Merge branch 'master' of https://codeberg.org/river/river

Deprecate and ignore the riverctl commands for creating explicit
keyboard groups.

In my mind, the only reason to have more than one keyboard group is if
different keyboard devices are assigned different keymaps or repeat
rates. River does not currently allow such things to be configured
however.

When river eventually makes it possible to configure different keymaps
and repeat rates per keyboard device, there is no reason we can't 100%
automatically group keyboards based on the keymap/repeat rate.

Exposing this keyboard group abstraction to the user is just bad UX.

Failing to group keyboards automatically also creates confusing/buggy
behavior for the user if the hardware, for example, exposes some of the
the XF86 buttons on a laptop as a separate keyboard device from the main
keyboard. Creating keybindings for these XF86 buttons that use modifiers
doesn't work by default, but there's no reason it shouldn't just work.

Closes: https://codeberg.org/river/river/issues/1138

.builds/alpine.yml

@@ -14,7 +14,6 @@ packages:
   - xcb-util-wm-dev
   - pixman-dev
   - libevdev-dev
-  - wayland-dev
   - wayland-protocols
   - xwayland-dev
   - meson
@@ -24,11 +23,18 @@ packages:
   - xz
 sources:
   - https://codeberg.org/river/river
+  - https://gitlab.freedesktop.org/wayland/wayland.git
   - https://gitlab.freedesktop.org/wlroots/wlroots.git
 tasks:
   - install_deps: |
+      cd wayland
+      git checkout 1.23.0
+      meson setup build -Ddocumentation=false -Dtests=false --prefix /usr
+      sudo ninja -C build install
+      cd ..
+
       cd wlroots
-      git checkout 0.19.0
+      git checkout 0.18.0
       meson setup build --auto-features=enabled -Drenderers=gles2 \
             -Dcolor-management=disabled -Dlibliftoff=disabled \
             -Dexamples=false -Dwerror=false -Db_ndebug=false \
@@ -37,10 +43,10 @@ tasks:
       cd ..
 
       # Eat Github's resources rather than the Zig Software Foundation's resources!
-      wget -nv https://github.com/ifreund/zig-tarball-mirror/releases/download/0.15.1/zig-x86_64-linux-0.15.1.tar.xz
-      tar xf zig-x86_64-linux-0.15.1.tar.xz
-      sudo mv zig-x86_64-linux-0.15.1/zig /usr/bin/
-      sudo mv zig-x86_64-linux-0.15.1/lib /usr/lib/zig
+      wget -nv https://github.com/ifreund/zig-tarball-mirror/releases/download/0.13.0/zig-linux-x86_64-0.13.0.tar.xz
+      tar xf zig-linux-x86_64-0.13.0.tar.xz
+      sudo mv zig-linux-x86_64-0.13.0/zig /usr/bin/
+      sudo mv zig-linux-x86_64-0.13.0/lib /usr/lib/zig
   - build: |
       cd river
       zig build --summary all
@@ -53,3 +59,4 @@ tasks:
       zig fmt --check riverctl/
       zig fmt --check rivertile/
       zig fmt --check build.zig
+      zig fmt --check build.zig.zon

.builds/archlinux.yml

@@ -21,11 +21,18 @@ packages:
   - xz
 sources:
   - https://codeberg.org/river/river
+  - https://gitlab.freedesktop.org/wayland/wayland.git
   - https://gitlab.freedesktop.org/wlroots/wlroots.git
 tasks:
   - install_deps: |
+      cd wayland
+      git checkout 1.23.0
+      meson setup build -Ddocumentation=false -Dtests=false --prefix /usr
+      sudo ninja -C build install
+      cd ..
+
       cd wlroots
-      git checkout 0.19.0
+      git checkout 0.18.0
       meson setup build --auto-features=enabled -Drenderers=gles2 \
             -Dcolor-management=disabled -Dlibliftoff=disabled \
             -Dexamples=false -Dwerror=false -Db_ndebug=false \
@@ -34,10 +41,10 @@ tasks:
       cd ..
 
       # Eat Github's resources rather than the Zig Software Foundation's resources!
-      wget -nv https://github.com/ifreund/zig-tarball-mirror/releases/download/0.15.1/zig-x86_64-linux-0.15.1.tar.xz
-      tar xf zig-x86_64-linux-0.15.1.tar.xz
-      sudo mv zig-x86_64-linux-0.15.1/zig /usr/bin/
-      sudo mv zig-x86_64-linux-0.15.1/lib /usr/lib/zig
+      wget -nv https://github.com/ifreund/zig-tarball-mirror/releases/download/0.13.0/zig-linux-x86_64-0.13.0.tar.xz
+      tar xf zig-linux-x86_64-0.13.0.tar.xz
+      sudo mv zig-linux-x86_64-0.13.0/zig /usr/bin/
+      sudo mv zig-linux-x86_64-0.13.0/lib /usr/lib/zig
   - build: |
       cd river
       zig build --summary all
@@ -50,3 +57,4 @@ tasks:
       zig fmt --check riverctl/
       zig fmt --check rivertile/
       zig fmt --check build.zig
+      zig fmt --check build.zig.zon

.builds/freebsd.yml

@@ -7,7 +7,6 @@ packages:
   - devel/meson
   - devel/pkgconf
   - graphics/mesa-libs
-  - graphics/wayland
   - graphics/wayland-protocols
   - misc/hwdata
   - x11/libX11
@@ -27,13 +26,19 @@ packages:
   - wget
 sources:
   - https://codeberg.org/river/river
+  - https://gitlab.freedesktop.org/wayland/wayland.git
   - https://gitlab.freedesktop.org/wlroots/wlroots.git
 tasks:
   - install_deps: |
+      cd wayland
+      git checkout 1.23.0
+      meson setup build -Ddocumentation=false -Dtests=false --prefix /usr
+      sudo ninja -C build install
+      cd ..
+
       cd wlroots
-      git checkout 0.19.0
+      git checkout 0.18.0
       meson setup build --auto-features=enabled -Drenderers=gles2 \
-            -Dallocators=gbm \
             -Dcolor-management=disabled -Dlibliftoff=disabled \
             -Dexamples=false -Dwerror=false -Db_ndebug=false \
             -Dxcb-errors=disabled --prefix /usr
@@ -41,10 +46,10 @@ tasks:
       cd ..
 
       # Eat Github's resources rather than the Zig Software Foundation's resources!
-      wget -nv https://github.com/ifreund/zig-tarball-mirror/releases/download/0.15.1/zig-x86_64-freebsd-0.15.1.tar.xz
-      tar xf zig-x86_64-freebsd-0.15.1.tar.xz
-      sudo mv zig-x86_64-freebsd-0.15.1/zig /usr/bin/
-      sudo mv zig-x86_64-freebsd-0.15.1/lib /usr/lib/zig
+      wget -nv https://github.com/ifreund/zig-tarball-mirror/releases/download/0.13.0/zig-freebsd-x86_64-0.13.0.tar.xz
+      tar xf zig-freebsd-x86_64-0.13.0.tar.xz
+      sudo mv zig-freebsd-x86_64-0.13.0/zig /usr/bin/
+      sudo mv zig-freebsd-x86_64-0.13.0/lib /usr/lib/zig
   - build: |
       cd river
       zig build --summary all

.gitignore

@@ -1,2 +1,4 @@
 .zig-cache/
+zig-cache/
 zig-out/
+deps/

README.md

@@ -57,10 +57,10 @@ To compile river first ensure that you have the following dependencies
 installed. The "development" versions are required if applicable to your
 distribution.
 
-- [zig](https://ziglang.org/download/) 0.15
+- [zig](https://ziglang.org/download/) 0.13
 - wayland
 - wayland-protocols
-- [wlroots](https://gitlab.freedesktop.org/wlroots/wlroots) 0.19
+- [wlroots](https://gitlab.freedesktop.org/wlroots/wlroots) 0.18
 - xkbcommon
 - libevdev
 - pixman

build.zig

@@ -4,7 +4,13 @@ const Build = std.Build;
 const fs = std.fs;
 const mem = std.mem;
 
-const Scanner = @import("wayland").Scanner;
+const Scanner = @import("zig-wayland").Scanner;
+
+/// While a river release is in development, this string should contain the version in development
+/// with the "-dev" suffix.
+/// When a release is tagged, the "-dev" suffix should be removed for the commit that gets tagged.
+/// Directly after the tagged commit, the version should be bumped and the "-dev" suffix added.
+const version = "0.4.0-dev";
 
 pub fn build(b: *Build) !void {
     const target = b.standardTargetOptions(.{});
@@ -12,6 +18,7 @@ pub fn build(b: *Build) !void {
 
     const strip = b.option(bool, "strip", "Omit debug information") orelse false;
     const pie = b.option(bool, "pie", "Build a Position Independent Executable") orelse false;
+    const llvm = !(b.option(bool, "no-llvm", "(expirimental) Use non-LLVM x86 Zig backend") orelse false);
 
     const omit_frame_pointer = switch (optimize) {
         .Debug, .ReleaseSafe => false,
@@ -64,7 +71,7 @@ pub fn build(b: *Build) !void {
                 .Inherit,
             ) catch break :blk version;
 
-            var it = mem.splitScalar(u8, mem.trim(u8, git_describe_long, &std.ascii.whitespace), '-');
+            var it = mem.split(u8, mem.trim(u8, git_describe_long, &std.ascii.whitespace), "-");
             _ = it.next().?; // previous tag
             const commit_count = it.next().?;
             const commit_hash = it.next().?;
@@ -129,10 +136,10 @@ pub fn build(b: *Build) !void {
 
     const wayland = b.createModule(.{ .root_source_file = scanner.result });
 
-    const xkbcommon = b.dependency("xkbcommon", .{}).module("xkbcommon");
-    const pixman = b.dependency("pixman", .{}).module("pixman");
+    const xkbcommon = b.dependency("zig-xkbcommon", .{}).module("xkbcommon");
+    const pixman = b.dependency("zig-pixman", .{}).module("pixman");
 
-    const wlroots = b.dependency("wlroots", .{}).module("wlroots");
+    const wlroots = b.dependency("zig-wlroots", .{}).module("wlroots");
     wlroots.addImport("wayland", wayland);
     wlroots.addImport("xkbcommon", xkbcommon);
     wlroots.addImport("pixman", pixman);
@@ -141,7 +148,7 @@ pub fn build(b: *Build) !void {
     // exposed to the wlroots module for @cImport() to work. This seems to be
     // the best way to do so with the current std.Build API.
     wlroots.resolved_target = target;
-    wlroots.linkSystemLibrary("wlroots-0.19", .{});
+    wlroots.linkSystemLibrary("wlroots-0.18", .{});
 
     const flags = b.createModule(.{ .root_source_file = b.path("common/flags.zig") });
     const globber = b.createModule(.{ .root_source_file = b.path("common/globber.zig") });
@@ -149,12 +156,12 @@ pub fn build(b: *Build) !void {
     {
         const river = b.addExecutable(.{
             .name = "river",
-            .root_module = b.createModule(.{
             .root_source_file = b.path("river/main.zig"),
             .target = target,
             .optimize = optimize,
             .strip = strip,
-            }),
+            .use_llvm = llvm,
+            .use_lld = llvm,
         });
         river.root_module.addOptions("build_options", options);
 
@@ -162,7 +169,7 @@ pub fn build(b: *Build) !void {
         river.linkSystemLibrary("libevdev");
         river.linkSystemLibrary("libinput");
         river.linkSystemLibrary("wayland-server");
-        river.linkSystemLibrary("wlroots-0.19");
+        river.linkSystemLibrary("wlroots-0.18");
         river.linkSystemLibrary("xkbcommon");
         river.linkSystemLibrary("pixman-1");
 
@@ -187,12 +194,12 @@ pub fn build(b: *Build) !void {
     {
         const riverctl = b.addExecutable(.{
             .name = "riverctl",
-            .root_module = b.createModule(.{
             .root_source_file = b.path("riverctl/main.zig"),
             .target = target,
             .optimize = optimize,
             .strip = strip,
-            }),
+            .use_llvm = llvm,
+            .use_lld = llvm,
         });
         riverctl.root_module.addOptions("build_options", options);
 
@@ -210,12 +217,12 @@ pub fn build(b: *Build) !void {
     {
         const rivertile = b.addExecutable(.{
             .name = "rivertile",
-            .root_module = b.createModule(.{
             .root_source_file = b.path("rivertile/main.zig"),
             .target = target,
             .optimize = optimize,
             .strip = strip,
-            }),
+            .use_llvm = llvm,
+            .use_lld = llvm,
         });
         rivertile.root_module.addOptions("build_options", options);
 
@@ -274,11 +281,9 @@ pub fn build(b: *Build) !void {
 
     {
         const globber_test = b.addTest(.{
-            .root_module = b.createModule(.{
             .root_source_file = b.path("common/globber.zig"),
             .target = target,
             .optimize = optimize,
-            }),
         });
         const run_globber_test = b.addRunArtifact(globber_test);
 
@@ -286,31 +291,3 @@ pub fn build(b: *Build) !void {
         test_step.dependOn(&run_globber_test.step);
     }
 }
-
-const version = manifest.version;
-/// Getting rid of this wart requires upstream zig improvements.
-/// See: https://github.com/ziglang/zig/issues/22775
-const manifest: struct {
-    name: @Type(.enum_literal),
-    version: []const u8,
-    paths: []const []const u8,
-    dependencies: struct {
-        pixman: struct {
-            url: []const u8,
-            hash: []const u8,
-        },
-        wayland: struct {
-            url: []const u8,
-            hash: []const u8,
-        },
-        wlroots: struct {
-            url: []const u8,
-            hash: []const u8,
-        },
-        xkbcommon: struct {
-            url: []const u8,
-            hash: []const u8,
-        },
-    },
-    fingerprint: u64,
-} = @import("build.zig.zon");

build.zig.zon

@@ -1,29 +1,23 @@
 .{
-    .name = .river,
-    // While a river release is in development, this string should contain
-    // the version in development with the "-dev" suffix.
-    // When a release is tagged, the "-dev" suffix should be removed for the
-    // commit that gets tagged. Directly after the tagged commit, the version
-    // should be bumped and the "-dev" suffix added.
-    .version = "0.3.12",
+    .name = "river",
+    .version = "0.4.0-dev",
     .paths = .{""},
     .dependencies = .{
-        .pixman = .{
-            .url = "https://codeberg.org/ifreund/zig-pixman/archive/v0.3.0.tar.gz",
-            .hash = "pixman-0.3.0-LClMnz2VAAAs7QSCGwLimV5VUYx0JFnX5xWU6HwtMuDX",
+        .@"zig-pixman" = .{
+            .url = "https://codeberg.org/ifreund/zig-pixman/archive/v0.2.0.tar.gz",
+            .hash = "12209db20ce873af176138b76632931def33a10539387cba745db72933c43d274d56",
         },
-        .wayland = .{
-            .url = "https://codeberg.org/ifreund/zig-wayland/archive/v0.4.0.tar.gz",
-            .hash = "wayland-0.4.0-lQa1khbMAQAsLS2eBR7M5lofyEGPIbu2iFDmoz8lPC27",
+        .@"zig-wayland" = .{
+            .url = "https://codeberg.org/ifreund/zig-wayland/archive/bd8afd256fb6beed7d72e3580b00f33dea7155a1.tar.gz",
+            .hash = "1220218a0e5c2cd63a2311417f4d3f2411dd17d75815f67c704ee657bd846ecbc3e0",
         },
-        .wlroots = .{
-            .url = "https://codeberg.org/ifreund/zig-wlroots/archive/v0.19.3.tar.gz",
-            .hash = "wlroots-0.19.3-jmOlcuL_AwBHhLCwpFsXbTizE3q9BugFmGX-XIxqcPMc",
+        .@"zig-wlroots" = .{
+            .url = "https://codeberg.org/ifreund/zig-wlroots/archive/afbbbbe5579c750feed8de12b073fa50b0651137.tar.gz",
+            .hash = "122060ddef836b7872cb2088764a8bd2fb2e9254327673e8176b7f7a621ec897484f",
         },
-        .xkbcommon = .{
-            .url = "https://codeberg.org/ifreund/zig-xkbcommon/archive/v0.3.0.tar.gz",
-            .hash = "xkbcommon-0.3.0-VDqIe3K9AQB2fG5ZeRcMC9i7kfrp5m2rWgLrmdNn9azr",
+        .@"zig-xkbcommon" = .{
+            .url = "https://codeberg.org/ifreund/zig-xkbcommon/archive/v0.2.0.tar.gz",
+            .hash = "1220c90b2228d65fd8427a837d31b0add83e9fade1dcfa539bb56fd06f1f8461605f",
         },
     },
-    .fingerprint = 0xf5e3672b8e8d6efc,
 }

common/flags.zig

@@ -42,21 +42,21 @@ pub fn parser(comptime Arg: type, comptime flags: []const Flag) type {
                         .boolean => .{
                             .name = flag.name,
                             .type = bool,
-                            .default_value_ptr = &false,
+                            .default_value = &false,
                             .is_comptime = false,
                             .alignment = @alignOf(bool),
                         },
                         .arg => .{
                             .name = flag.name,
                             .type = ?[:0]const u8,
-                            .default_value_ptr = &@as(?[:0]const u8, null),
+                            .default_value = &@as(?[:0]const u8, null),
                             .is_comptime = false,
                             .alignment = @alignOf(?[:0]const u8),
                         },
                     };
                     fields = fields ++ [_]std.builtin.Type.StructField{field};
                 }
-                break :flags_type @Type(.{ .@"struct" = .{
+                break :flags_type @Type(.{ .Struct = .{
                     .layout = .auto,
                     .fields = fields,
                     .decls = &.{},

river/Control.zig

@@ -84,7 +84,7 @@ fn handleRequest(control_v1: *zriver.ControlV1, request: zriver.ControlV1.Reques
             };
         },
         .run_command => |run_command| {
-            const seat: *Seat = @ptrCast(@alignCast(wlr.Seat.Client.fromWlSeat(run_command.seat).?.seat.data));
+            const seat: *Seat = @ptrFromInt(wlr.Seat.Client.fromWlSeat(run_command.seat).?.seat.data);
 
             const callback = zriver.CommandCallbackV1.create(
                 control_v1.getClient(),

river/Cursor.zig

@@ -26,7 +26,7 @@ const wayland = @import("wayland");
 const wl = wayland.server.wl;
 const zwlr = wayland.server.zwlr;
 
-const c = @import("c.zig").c;
+const c = @import("c.zig");
 const server = &@import("main.zig").server;
 const util = @import("util.zig");
 
@@ -138,7 +138,7 @@ wlr_cursor: *wlr.Cursor,
 /// Xcursor manager for the currently configured Xcursor theme.
 xcursor_manager: *wlr.XcursorManager,
 image: Image = .none,
-image_surface_destroy: wl.Listener(*wlr.Surface) = .init(handleImageSurfaceDestroy),
+image_surface_destroy: wl.Listener(*wlr.Surface) = wl.Listener(*wlr.Surface).init(handleImageSurfaceDestroy),
 
 /// Number of distinct buttons currently pressed
 pressed_count: u32 = 0,
@@ -255,30 +255,6 @@ pub fn init(cursor: *Cursor, seat: *Seat) !void {
 }
 
 pub fn deinit(cursor: *Cursor) void {
-    cursor.axis.link.remove();
-    cursor.button.link.remove();
-    cursor.frame.link.remove();
-    cursor.motion_absolute.link.remove();
-    cursor.motion.link.remove();
-    cursor.swipe_begin.link.remove();
-    cursor.swipe_update.link.remove();
-    cursor.swipe_end.link.remove();
-    cursor.pinch_begin.link.remove();
-    cursor.pinch_update.link.remove();
-    cursor.pinch_end.link.remove();
-    cursor.request_set_cursor.link.remove();
-
-    cursor.touch_down.link.remove();
-    cursor.touch_motion.link.remove();
-    cursor.touch_up.link.remove();
-    cursor.touch_cancel.link.remove();
-    cursor.touch_frame.link.remove();
-
-    cursor.tablet_tool_axis.link.remove();
-    cursor.tablet_tool_proximity.link.remove();
-    cursor.tablet_tool_tip.link.remove();
-    cursor.tablet_tool_button.link.remove();
-
     cursor.hide_cursor_timer.remove();
     cursor.xcursor_manager.destroy();
     cursor.wlr_cursor.destroy();
@@ -296,7 +272,7 @@ pub fn setTheme(cursor: *Cursor, theme: ?[*:0]const u8, _size: ?u32) !void {
     // If this cursor belongs to the default seat, set the xcursor environment
     // variables as well as the xwayland cursor theme.
     if (cursor.seat == server.input_manager.defaultSeat()) {
-        const size_str = try std.fmt.allocPrintSentinel(util.gpa, "{}", .{size}, 0);
+        const size_str = try std.fmt.allocPrintZ(util.gpa, "{}", .{size});
         defer util.gpa.free(size_str);
         if (c.setenv("XCURSOR_SIZE", size_str.ptr, 1) < 0) return error.OutOfMemory;
         if (theme) |t| if (c.setenv("XCURSOR_THEME", t, 1) < 0) return error.OutOfMemory;
@@ -362,7 +338,7 @@ fn clearFocus(cursor: *Cursor) void {
 /// Axis event is a scroll wheel or similiar
 fn handleAxis(listener: *wl.Listener(*wlr.Pointer.event.Axis), event: *wlr.Pointer.event.Axis) void {
     const cursor: *Cursor = @fieldParentPtr("axis", listener);
-    const device: *InputDevice = @ptrCast(@alignCast(event.device.data));
+    const device: *InputDevice = @ptrFromInt(event.device.data);
 
     cursor.seat.handleActivity();
     cursor.unhide();
@@ -378,8 +354,8 @@ fn handleAxis(listener: *wl.Listener(*wlr.Pointer.event.Axis), event: *wlr.Point
             // @intFromFloat() call safe due to the max/min i32 not being exactly representable
             // by an f32. Dividing by 2 is a low effort way to ensure the value is in bounds and
             // allow users to set their scroll-factor to inf without crashing river.
-            @as(f32, @floatFromInt(math.minInt(i32) / 2)),
-            @as(f32, @floatFromInt(math.maxInt(i32) / 2)),
+            math.minInt(i32) / 2,
+            math.maxInt(i32) / 2,
         )),
         event.source,
         event.relative_direction,
@@ -482,7 +458,7 @@ fn updateKeyboardFocus(cursor: Cursor, result: Root.AtResult) void {
 /// Requires a call to Root.applyPending()
 fn updateOutputFocus(cursor: Cursor, lx: f64, ly: f64) void {
     if (server.root.output_layout.outputAt(lx, ly)) |wlr_output| {
-        const output: *Output = @ptrCast(@alignCast(wlr_output.data));
+        const output: *Output = @ptrFromInt(wlr_output.data);
         cursor.seat.focusOutput(output);
     }
 }
@@ -659,7 +635,7 @@ fn handleTabletToolAxis(
     _: *wl.Listener(*wlr.Tablet.event.Axis),
     event: *wlr.Tablet.event.Axis,
 ) void {
-    const device: *InputDevice = @ptrCast(@alignCast(event.device.data));
+    const device: *InputDevice = @ptrFromInt(event.device.data);
     const tablet: *Tablet = @fieldParentPtr("device", device);
 
     device.seat.handleActivity();
@@ -673,7 +649,7 @@ fn handleTabletToolProximity(
     _: *wl.Listener(*wlr.Tablet.event.Proximity),
     event: *wlr.Tablet.event.Proximity,
 ) void {
-    const device: *InputDevice = @ptrCast(@alignCast(event.device.data));
+    const device: *InputDevice = @ptrFromInt(event.device.data);
     const tablet: *Tablet = @fieldParentPtr("device", device);
 
     device.seat.handleActivity();
@@ -687,7 +663,7 @@ fn handleTabletToolTip(
     _: *wl.Listener(*wlr.Tablet.event.Tip),
     event: *wlr.Tablet.event.Tip,
 ) void {
-    const device: *InputDevice = @ptrCast(@alignCast(event.device.data));
+    const device: *InputDevice = @ptrFromInt(event.device.data);
     const tablet: *Tablet = @fieldParentPtr("device", device);
 
     device.seat.handleActivity();
@@ -701,7 +677,7 @@ fn handleTabletToolButton(
     _: *wl.Listener(*wlr.Tablet.event.Button),
     event: *wlr.Tablet.event.Button,
 ) void {
-    const device: *InputDevice = @ptrCast(@alignCast(event.device.data));
+    const device: *InputDevice = @ptrFromInt(event.device.data);
     const tablet: *Tablet = @fieldParentPtr("device", device);
 
     device.seat.handleActivity();
@@ -822,7 +798,6 @@ pub fn hide(cursor: *Cursor) void {
 
     cursor.hidden = true;
     cursor.wlr_cursor.unsetImage();
-    cursor.seat.wlr_seat.pointerNotifyClearFocus();
     cursor.hide_cursor_timer.timerUpdate(0) catch {
         log.err("failed to update cursor hide timeout", .{});
     };
@@ -1154,12 +1129,13 @@ pub fn updateState(cursor: *Cursor) void {
         .passthrough => {
             cursor.updateFocusFollowsCursorTarget();
             if (!cursor.hidden) {
-                const now = posix.clock_gettime(.MONOTONIC) catch @panic("CLOCK_MONOTONIC not supported");
+                var now: posix.timespec = undefined;
+                posix.clock_gettime(posix.CLOCK.MONOTONIC, &now) catch @panic("CLOCK_MONOTONIC not supported");
                 // 2^32-1 milliseconds is ~50 days, which is a realistic uptime.
                 // This means that we must wrap if the monotonic time is greater than
                 // 2^32-1 milliseconds and hope that clients don't get too confused.
                 const msec: u32 = @intCast(@rem(
-                    now.sec *% std.time.ms_per_s +% @divTrunc(now.nsec, std.time.ns_per_ms),
+                    now.tv_sec *% std.time.ms_per_s +% @divTrunc(now.tv_nsec, std.time.ns_per_ms),
                     math.maxInt(u32),
                 ));
                 cursor.passthrough(msec);
@@ -1301,7 +1277,7 @@ fn warp(cursor: *Cursor) void {
 fn updateDragIcons(cursor: *Cursor) void {
     var it = server.root.drag_icons.children.iterator(.forward);
     while (it.next()) |node| {
-        const icon: *DragIcon = @ptrCast(@alignCast(node.data));
+        const icon = @as(*DragIcon, @ptrFromInt(node.data));
 
         if (icon.wlr_drag_icon.drag.seat == cursor.seat.wlr_seat) {
             icon.updatePosition(cursor);

river/DragIcon.zig

@@ -42,7 +42,7 @@ pub fn create(wlr_drag_icon: *wlr.Drag.Icon, cursor: *Cursor) error{OutOfMemory}
         .wlr_drag_icon = wlr_drag_icon,
         .scene_drag_icon = scene_drag_icon,
     };
-    scene_drag_icon.node.data = drag_icon;
+    scene_drag_icon.node.data = @intFromPtr(drag_icon);
 
     drag_icon.updatePosition(cursor);
 

river/ForeignToplevelHandle.zig

@@ -89,7 +89,7 @@ fn handleForeignActivate(
 ) void {
     const handle: *ForeignToplevelHandle = @fieldParentPtr("foreign_activate", listener);
     const view: *View = @fieldParentPtr("foreign_toplevel_handle", handle);
-    const seat: *Seat = @ptrCast(@alignCast(event.seat.data));
+    const seat: *Seat = @ptrFromInt(event.seat.data);
 
     seat.focus(view);
     server.root.applyPending();

river/IdleInhibitManager.zig

@@ -30,29 +30,28 @@ const View = @import("View.zig");
 wlr_manager: *wlr.IdleInhibitManagerV1,
 new_idle_inhibitor: wl.Listener(*wlr.IdleInhibitorV1) =
     wl.Listener(*wlr.IdleInhibitorV1).init(handleNewIdleInhibitor),
-inhibitors: wl.list.Head(IdleInhibitor, .link),
+inhibitors: std.TailQueue(IdleInhibitor) = .{},
 
 pub fn init(inhibit_manager: *IdleInhibitManager) !void {
     inhibit_manager.* = .{
         .wlr_manager = try wlr.IdleInhibitManagerV1.create(server.wl_server),
-        .inhibitors = undefined,
     };
-    inhibit_manager.inhibitors.init();
     inhibit_manager.wlr_manager.events.new_inhibitor.add(&inhibit_manager.new_idle_inhibitor);
 }
 
 pub fn deinit(inhibit_manager: *IdleInhibitManager) void {
-    while (inhibit_manager.inhibitors.first()) |inhibitor| {
-        inhibitor.destroy();
+    while (inhibit_manager.inhibitors.pop()) |inhibitor| {
+        inhibitor.data.destroy.link.remove();
+        util.gpa.destroy(inhibitor);
     }
     inhibit_manager.new_idle_inhibitor.link.remove();
 }
 
 pub fn checkActive(inhibit_manager: *IdleInhibitManager) void {
     var inhibited = false;
-    var it = inhibit_manager.inhibitors.iterator(.forward);
-    while (it.next()) |inhibitor| {
-        const node_data = SceneNodeData.fromSurface(inhibitor.wlr_inhibitor.surface) orelse continue;
+    var it = inhibit_manager.inhibitors.first;
+    while (it) |node| : (it = node.next) {
+        const node_data = SceneNodeData.fromSurface(node.data.wlr_inhibitor.surface) orelse continue;
         switch (node_data.data) {
             .view => |view| {
                 if (view.current.output != null and
@@ -80,8 +79,13 @@ pub fn checkActive(inhibit_manager: *IdleInhibitManager) void {
 
 fn handleNewIdleInhibitor(listener: *wl.Listener(*wlr.IdleInhibitorV1), inhibitor: *wlr.IdleInhibitorV1) void {
     const inhibit_manager: *IdleInhibitManager = @fieldParentPtr("new_idle_inhibitor", listener);
-    IdleInhibitor.create(inhibitor, inhibit_manager) catch {
-        std.log.err("out of memory", .{});
+    const inhibitor_node = util.gpa.create(std.TailQueue(IdleInhibitor).Node) catch return;
+    inhibitor_node.data.init(inhibitor, inhibit_manager) catch {
+        util.gpa.destroy(inhibitor_node);
         return;
     };
+
+    inhibit_manager.inhibitors.append(inhibitor_node);
+
+    inhibit_manager.checkActive();
 }

river/IdleInhibitor.zig

@@ -28,38 +28,31 @@ const IdleInhibitManager = @import("IdleInhibitManager.zig");
 inhibit_manager: *IdleInhibitManager,
 wlr_inhibitor: *wlr.IdleInhibitorV1,
 
-listen_destroy: wl.Listener(*wlr.Surface) = wl.Listener(*wlr.Surface).init(handleDestroy),
-
-link: wl.list.Link,
-
-pub fn create(wlr_inhibitor: *wlr.IdleInhibitorV1, inhibit_manager: *IdleInhibitManager) !void {
-    const inhibitor = try util.gpa.create(IdleInhibitor);
-    errdefer util.gpa.destroy(inhibitor);
+destroy: wl.Listener(*wlr.Surface) = wl.Listener(*wlr.Surface).init(handleDestroy),
 
+pub fn init(
+    inhibitor: *IdleInhibitor,
+    wlr_inhibitor: *wlr.IdleInhibitorV1,
+    inhibit_manager: *IdleInhibitManager,
+) !void {
     inhibitor.* = .{
         .inhibit_manager = inhibit_manager,
         .wlr_inhibitor = wlr_inhibitor,
-        .link = undefined,
     };
-    wlr_inhibitor.events.destroy.add(&inhibitor.listen_destroy);
-
-    inhibit_manager.inhibitors.append(inhibitor);
+    wlr_inhibitor.events.destroy.add(&inhibitor.destroy);
 
     inhibit_manager.checkActive();
 }
 
-pub fn destroy(inhibitor: *IdleInhibitor) void {
-    inhibitor.listen_destroy.link.remove();
+fn handleDestroy(listener: *wl.Listener(*wlr.Surface), _: *wlr.Surface) void {
+    const inhibitor: *IdleInhibitor = @fieldParentPtr("destroy", listener);
 
-    inhibitor.link.remove();
+    inhibitor.destroy.link.remove();
+
+    const node: *std.TailQueue(IdleInhibitor).Node = @fieldParentPtr("data", inhibitor);
+    server.idle_inhibit_manager.inhibitors.remove(node);
 
     inhibitor.inhibit_manager.checkActive();
 
-    util.gpa.destroy(inhibitor);
-}
-
-fn handleDestroy(listener: *wl.Listener(*wlr.Surface), _: *wlr.Surface) void {
-    const inhibitor: *IdleInhibitor = @fieldParentPtr("listen_destroy", listener);
-
-    inhibitor.destroy();
+    util.gpa.destroy(node);
 }

river/InputConfig.zig

@@ -25,7 +25,7 @@ const wlr = @import("wlroots");
 
 const log = std.log.scoped(.input_config);
 
-const c = @import("c.zig").c;
+const c = @import("c.zig");
 
 const server = &@import("main.zig").server;
 const util = @import("util.zig");
@@ -307,7 +307,7 @@ pub fn apply(config: *const InputConfig, device: *InputDevice) void {
     const libinput_device: *c.libinput_device = @ptrCast(device.wlr_device.getLibinputDevice() orelse return);
     log.debug("applying input configuration '{s}' to device '{s}'.", .{ config.glob, device.identifier });
 
-    inline for (@typeInfo(InputConfig).@"struct".fields) |field| {
+    inline for (@typeInfo(InputConfig).Struct.fields) |field| {
         if (comptime mem.eql(u8, field.name, "glob")) continue;
 
         if (@field(config, field.name)) |setting| {
@@ -324,7 +324,7 @@ pub fn apply(config: *const InputConfig, device: *InputDevice) void {
 }
 
 pub fn parse(config: *InputConfig, setting: []const u8, value: []const u8) !void {
-    inline for (@typeInfo(InputConfig).@"struct".fields) |field| {
+    inline for (@typeInfo(InputConfig).Struct.fields) |field| {
         if (comptime mem.eql(u8, field.name, "glob")) continue;
 
         if (mem.eql(u8, setting, field.name)) {
@@ -358,8 +358,8 @@ pub fn parse(config: *InputConfig, setting: []const u8, value: []const u8) !void
                 }
                 config.@"map-to-output" = .{ .output_name = output_name_owned };
             } else {
-                const T = @typeInfo(field.type).optional.child;
-                if (@typeInfo(T) != .@"enum") {
+                const T = @typeInfo(field.type).Optional.child;
+                if (@typeInfo(T) != .Enum) {
                     @compileError("You forgot to implement parsing for an input configuration setting.");
                 }
                 @field(config, field.name) = meta.stringToEnum(T, value) orelse
@@ -373,10 +373,10 @@ pub fn parse(config: *InputConfig, setting: []const u8, value: []const u8) !void
     return error.UnknownCommand;
 }
 
-pub fn write(config: *InputConfig, writer: *std.Io.Writer) !void {
+pub fn write(config: *InputConfig, writer: anytype) !void {
     try writer.print("{s}\n", .{config.glob});
 
-    inline for (@typeInfo(InputConfig).@"struct".fields) |field| {
+    inline for (@typeInfo(InputConfig).Struct.fields) |field| {
         if (comptime mem.eql(u8, field.name, "glob")) continue;
 
         if (comptime mem.eql(u8, field.name, "map-to-output")) {
@@ -396,8 +396,8 @@ pub fn write(config: *InputConfig, writer: *std.Io.Writer) !void {
                     mem.sliceTo(c.libevdev_event_code_get_name(c.EV_KEY, setting.button), 0),
                 });
             } else {
-                const T = @typeInfo(field.type).optional.child;
-                if (@typeInfo(T) != .@"enum") {
+                const T = @typeInfo(field.type).Optional.child;
+                if (@typeInfo(T) != .Enum) {
                     @compileError("You forgot to implement listing for an input configuration setting.");
                 }
                 try writer.print("\t{s}: {s}\n", .{ field.name, @tagName(setting) });

river/InputDevice.zig

@@ -24,7 +24,7 @@ const wl = @import("wayland").server.wl;
 
 const globber = @import("globber");
 
-const c = @import("c.zig").c;
+const c = @import("c.zig");
 const server = &@import("main.zig").server;
 const util = @import("util.zig");
 
@@ -86,7 +86,7 @@ pub fn init(device: *InputDevice, seat: *Seat, wlr_device: *wlr.InputDevice) !vo
         .link = undefined,
     };
 
-    wlr_device.data = device;
+    wlr_device.data = @intFromPtr(device);
 
     wlr_device.events.destroy.add(&device.destroy);
 
@@ -117,7 +117,7 @@ pub fn deinit(device: *InputDevice) void {
         device.seat.updateCapabilities();
     }
 
-    device.wlr_device.data = null;
+    device.wlr_device.data = 0;
 
     device.* = undefined;
 }

river/InputManager.zig

@@ -55,10 +55,10 @@ tablet_manager: *wlr.TabletManagerV2,
 
 /// List of input device configurations. Ordered by glob generality, with
 /// the most general towards the start and the most specific towards the end.
-configs: std.ArrayList(InputConfig) = .{},
+configs: std.ArrayList(InputConfig),
 
 devices: wl.list.Head(InputDevice, .link),
-seats: wl.list.Head(Seat, .link),
+seats: std.TailQueue(Seat) = .{},
 
 exclusive_client: ?*wl.Client = null,
 
@@ -74,6 +74,9 @@ new_text_input: wl.Listener(*wlr.TextInputV3) =
     wl.Listener(*wlr.TextInputV3).init(handleNewTextInput),
 
 pub fn init(input_manager: *InputManager) !void {
+    const seat_node = try util.gpa.create(std.TailQueue(Seat).Node);
+    errdefer util.gpa.destroy(seat_node);
+
     input_manager.* = .{
         // These are automatically freed when the display is destroyed
         .idle_notifier = try wlr.IdleNotifierV1.create(server.wl_server),
@@ -85,14 +88,14 @@ pub fn init(input_manager: *InputManager) !void {
         .input_method_manager = try wlr.InputMethodManagerV2.create(server.wl_server),
         .text_input_manager = try wlr.TextInputManagerV3.create(server.wl_server),
         .tablet_manager = try wlr.TabletManagerV2.create(server.wl_server),
+        .configs = std.ArrayList(InputConfig).init(util.gpa),
 
-        .seats = undefined,
         .devices = undefined,
     };
-    input_manager.seats.init();
     input_manager.devices.init();
 
-    try Seat.create(default_seat_name);
+    input_manager.seats.prepend(seat_node);
+    try seat_node.data.init(default_seat_name);
 
     if (build_options.xwayland) {
         if (server.xwayland) |xwayland| {
@@ -118,18 +121,19 @@ pub fn deinit(input_manager: *InputManager) void {
     input_manager.new_input_method.link.remove();
     input_manager.new_text_input.link.remove();
 
-    while (input_manager.seats.first()) |seat| {
-        seat.destroy();
+    while (input_manager.seats.pop()) |seat_node| {
+        seat_node.data.deinit();
+        util.gpa.destroy(seat_node);
     }
 
     for (input_manager.configs.items) |*config| {
         config.deinit();
     }
-    input_manager.configs.deinit(util.gpa);
+    input_manager.configs.deinit();
 }
 
-pub fn defaultSeat(input_manager: *InputManager) *Seat {
-    return input_manager.seats.first().?;
+pub fn defaultSeat(input_manager: InputManager) *Seat {
+    return &input_manager.seats.first.?.data;
 }
 
 /// Returns true if input is currently allowed on the passed surface.
@@ -156,7 +160,7 @@ pub fn reconfigureDevices(input_manager: *InputManager) void {
 fn handleNewInput(listener: *wl.Listener(*wlr.InputDevice), wlr_device: *wlr.InputDevice) void {
     const input_manager: *InputManager = @fieldParentPtr("new_input", listener);
 
-    input_manager.defaultSeat().addDevice(wlr_device, false);
+    input_manager.defaultSeat().addDevice(wlr_device);
 }
 
 fn handleNewVirtualPointer(
@@ -174,53 +178,17 @@ fn handleNewVirtualPointer(
         log.debug("Ignoring output suggestion from virtual pointer", .{});
     }
 
-    input_manager.defaultSeat().addDevice(&event.new_pointer.pointer.base, true);
+    input_manager.defaultSeat().addDevice(&event.new_pointer.pointer.base);
 }
 
 fn handleNewVirtualKeyboard(
     _: *wl.Listener(*wlr.VirtualKeyboardV1),
     virtual_keyboard: *wlr.VirtualKeyboardV1,
 ) void {
-    const no_keymap = util.gpa.create(NoKeymapVirtKeyboard) catch {
-        log.err("out of memory", .{});
-        return;
-    };
-    errdefer util.gpa.destroy(no_keymap);
-
-    no_keymap.* = .{
-        .virtual_keyboard = virtual_keyboard,
-    };
-    virtual_keyboard.keyboard.base.events.destroy.add(&no_keymap.destroy);
-    virtual_keyboard.keyboard.events.keymap.add(&no_keymap.keymap);
+    const seat: *Seat = @ptrFromInt(virtual_keyboard.seat.data);
+    seat.addDevice(&virtual_keyboard.keyboard.base);
 }
 
-/// Ignore virtual keyboards completely until the client sets a keymap
-/// Yes, wlroots should probably do this for us.
-const NoKeymapVirtKeyboard = struct {
-    virtual_keyboard: *wlr.VirtualKeyboardV1,
-    destroy: wl.Listener(*wlr.InputDevice) = .init(handleDestroy),
-    keymap: wl.Listener(*wlr.Keyboard) = .init(handleKeymap),
-
-    fn handleDestroy(listener: *wl.Listener(*wlr.InputDevice), _: *wlr.InputDevice) void {
-        const no_keymap: *NoKeymapVirtKeyboard = @fieldParentPtr("destroy", listener);
-
-        no_keymap.destroy.link.remove();
-        no_keymap.keymap.link.remove();
-
-        util.gpa.destroy(no_keymap);
-    }
-
-    fn handleKeymap(listener: *wl.Listener(*wlr.Keyboard), _: *wlr.Keyboard) void {
-        const no_keymap: *NoKeymapVirtKeyboard = @fieldParentPtr("keymap", listener);
-        const virtual_keyboard = no_keymap.virtual_keyboard;
-
-        handleDestroy(&no_keymap.destroy, &virtual_keyboard.keyboard.base);
-
-        const seat: *Seat = @ptrCast(@alignCast(virtual_keyboard.seat.data));
-        seat.addDevice(&virtual_keyboard.keyboard.base, true);
-    }
-};
-
 fn handleNewConstraint(
     _: *wl.Listener(*wlr.PointerConstraintV1),
     wlr_constraint: *wlr.PointerConstraintV1,
@@ -232,7 +200,7 @@ fn handleNewConstraint(
 }
 
 fn handleNewInputMethod(_: *wl.Listener(*wlr.InputMethodV2), input_method: *wlr.InputMethodV2) void {
-    const seat: *Seat = @ptrCast(@alignCast(input_method.seat.data));
+    const seat: *Seat = @ptrFromInt(input_method.seat.data);
 
     log.debug("new input method on seat {s}", .{seat.wlr_seat.name});
 

river/Keyboard.zig

@@ -54,60 +54,41 @@ pub const Pressed = struct {
         // Furthermore, wlroots will continue to forward key press/release events to river if more
         // than 32 keys are pressed. Therefore river chooses to ignore keypresses that would take
         // the keyboard beyond 32 simultaneously pressed keys.
-        assert(capacity == @typeInfo(std.meta.fieldInfo(wlr.Keyboard, .keycodes).type).array.len);
+        assert(capacity == @typeInfo(std.meta.fieldInfo(wlr.Keyboard, .keycodes).type).Array.len);
     }
 
-    keys: [capacity]Key,
-    len: usize,
-
-    const empty: Pressed = .{ .keys = undefined, .len = 0 };
-
-    pub fn slice(pressed: *Pressed) []Key {
-        return pressed.keys[0..pressed.len];
-    }
+    keys: std.BoundedArray(Key, capacity) = .{},
 
     fn contains(pressed: *Pressed, code: u32) bool {
-        for (pressed.slice()) |item| {
+        for (pressed.keys.constSlice()) |item| {
             if (item.code == code) return true;
         }
         return false;
     }
 
     fn addAssumeCapacity(pressed: *Pressed, new: Key) void {
-        assert(pressed.len < pressed.keys.len);
         assert(!pressed.contains(new.code));
-        pressed.keys[pressed.len] = new;
-        pressed.len += 1;
+        pressed.keys.appendAssumeCapacity(new);
     }
 
     fn remove(pressed: *Pressed, code: u32) ?KeyConsumer {
-        for (pressed.slice(), 0..) |item, idx| {
-            if (item.code == code) return pressed.swapRemove(idx).consumer;
+        for (pressed.keys.constSlice(), 0..) |item, idx| {
+            if (item.code == code) return pressed.keys.swapRemove(idx).consumer;
         }
 
         return null;
     }
-
-    fn swapRemove(pressed: *Pressed, index: usize) Key {
-        defer pressed.len -= 1;
-        if (index == pressed.len - 1) {
-            return pressed.keys[index];
-        }
-        const ret = pressed.keys[index];
-        pressed.keys[index] = pressed.keys[pressed.len - 1];
-        return ret;
-    }
 };
 
 device: InputDevice,
 
 /// Pressed keys along with where their press event has been sent
-pressed: Pressed = .empty,
+pressed: Pressed = .{},
 
 key: wl.Listener(*wlr.Keyboard.event.Key) = wl.Listener(*wlr.Keyboard.event.Key).init(handleKey),
 modifiers: wl.Listener(*wlr.Keyboard) = wl.Listener(*wlr.Keyboard).init(handleModifiers),
 
-pub fn init(keyboard: *Keyboard, seat: *Seat, wlr_device: *wlr.InputDevice, virtual: bool) !void {
+pub fn init(keyboard: *Keyboard, seat: *Seat, wlr_device: *wlr.InputDevice) !void {
     keyboard.* = .{
         .device = undefined,
     };
@@ -115,9 +96,8 @@ pub fn init(keyboard: *Keyboard, seat: *Seat, wlr_device: *wlr.InputDevice, virt
     errdefer keyboard.device.deinit();
 
     const wlr_keyboard = keyboard.device.wlr_device.toKeyboard();
-    wlr_keyboard.data = keyboard;
+    wlr_keyboard.data = @intFromPtr(keyboard);
 
-    if (!virtual) {
     // wlroots will log a more detailed error if this fails.
     if (!wlr_keyboard.setKeymap(server.config.keymap)) return error.OutOfMemory;
 
@@ -125,7 +105,6 @@ pub fn init(keyboard: *Keyboard, seat: *Seat, wlr_device: *wlr.InputDevice, virt
         // wlroots will log an error on failure
         _ = seat.keyboard_group.addKeyboard(wlr_keyboard);
     }
-    }
 
     wlr_keyboard.setRepeatInfo(server.config.repeat_rate, server.config.repeat_delay);
 
@@ -222,9 +201,7 @@ fn handleKey(listener: *wl.Listener(*wlr.Keyboard.event.Key), event: *wlr.Keyboa
         // Ignore key presses beyond 32 simultaneously pressed keys (see comments in Pressed).
         // We must ensure capacity before calling handleMapping() to ensure that we either run
         // both the press and release mapping for certain key or neither mapping.
-        if (keyboard.pressed.len >= keyboard.pressed.keys.len) {
-            return;
-        }
+        keyboard.pressed.keys.ensureUnusedCapacity(1) catch return;
 
         if (keyboard.device.seat.handleMapping(keycode, modifiers, released, xkb_state)) {
             break :blk .mapping;

river/LayerSurface.zig

@@ -43,7 +43,7 @@ commit: wl.Listener(*wlr.Surface) = wl.Listener(*wlr.Surface).init(handleCommit)
 new_popup: wl.Listener(*wlr.XdgPopup) = wl.Listener(*wlr.XdgPopup).init(handleNewPopup),
 
 pub fn create(wlr_layer_surface: *wlr.LayerSurfaceV1) error{OutOfMemory}!void {
-    const output: *Output = @ptrCast(@alignCast(wlr_layer_surface.output.?.data));
+    const output: *Output = @ptrFromInt(wlr_layer_surface.output.?.data);
     const layer_surface = try util.gpa.create(LayerSurface);
     errdefer util.gpa.destroy(layer_surface);
 
@@ -59,7 +59,7 @@ pub fn create(wlr_layer_surface: *wlr.LayerSurfaceV1) error{OutOfMemory}!void {
     try SceneNodeData.attach(&layer_surface.scene_layer_surface.tree.node, .{ .layer_surface = layer_surface });
     try SceneNodeData.attach(&layer_surface.popup_tree.node, .{ .layer_surface = layer_surface });
 
-    wlr_layer_surface.surface.data = &layer_surface.scene_layer_surface.tree.node;
+    wlr_layer_surface.surface.data = @intFromPtr(&layer_surface.scene_layer_surface.tree.node);
 
     wlr_layer_surface.events.destroy.add(&layer_surface.destroy);
     wlr_layer_surface.surface.events.map.add(&layer_surface.map);
@@ -82,14 +82,13 @@ fn handleDestroy(listener: *wl.Listener(*wlr.LayerSurfaceV1), _: *wlr.LayerSurfa
     layer_surface.map.link.remove();
     layer_surface.unmap.link.remove();
     layer_surface.commit.link.remove();
-    layer_surface.new_popup.link.remove();
 
     layer_surface.destroyPopups();
 
     layer_surface.popup_tree.node.destroy();
 
     // The wlr_surface may outlive the wlr_layer_surface so we must clean up the user data.
-    layer_surface.wlr_layer_surface.surface.data = null;
+    layer_surface.wlr_layer_surface.surface.data = 0;
 
     util.gpa.destroy(layer_surface);
 }
@@ -157,7 +156,7 @@ fn handleKeyboardInteractiveExclusive(output: *Output, consider: ?*LayerSurface)
         var it = tree.children.iterator(.reverse);
         while (it.next()) |node| {
             assert(node.type == .tree);
-            if (@as(?*SceneNodeData, @ptrCast(@alignCast(node.data)))) |node_data| {
+            if (@as(?*SceneNodeData, @ptrFromInt(node.data))) |node_data| {
                 const layer_surface = node_data.data.layer_surface;
                 const wlr_layer_surface = layer_surface.wlr_layer_surface;
                 if (wlr_layer_surface.surface.mapped and
@@ -173,8 +172,10 @@ fn handleKeyboardInteractiveExclusive(output: *Output, consider: ?*LayerSurface)
         assert(s.wlr_layer_surface.current.keyboard_interactive != .none);
     }
 
-    var it = server.input_manager.seats.iterator(.forward);
-    while (it.next()) |seat| {
+    var it = server.input_manager.seats.first;
+    while (it) |node| : (it = node.next) {
+        const seat = &node.data;
+
         if (seat.focused_output == output) {
             if (to_focus) |s| {
                 // If we found a surface on the output that requires focus, grab the focus of all

river/Layout.zig

@@ -38,9 +38,6 @@ layout_v3: *river.LayoutV3,
 namespace: []const u8,
 output: *Output,
 
-// Output.layouts
-link: wl.list.Link,
-
 pub fn create(client: *wl.Client, version: u32, id: u32, output: *Output, namespace: []const u8) !void {
     const layout_v3 = try river.LayoutV3.create(client, version, id);
 
@@ -50,22 +47,21 @@ pub fn create(client: *wl.Client, version: u32, id: u32, output: *Output, namesp
         return;
     }
 
-    const layout = try util.gpa.create(Layout);
-    errdefer util.gpa.destroy(layout);
-    layout.* = .{
+    const node = try util.gpa.create(std.TailQueue(Layout).Node);
+    errdefer util.gpa.destroy(node);
+    node.data = .{
         .layout_v3 = layout_v3,
         .namespace = try util.gpa.dupe(u8, namespace),
         .output = output,
-        .link = undefined,
     };
-    output.layouts.append(layout);
+    output.layouts.append(node);
 
-    layout_v3.setHandler(*Layout, handleRequest, handleDestroy, layout);
+    layout_v3.setHandler(*Layout, handleRequest, handleDestroy, &node.data);
 
     // If the namespace matches that of the output, set the layout as
     // the active one of the output and arrange it.
     if (mem.eql(u8, namespace, output.layoutNamespace())) {
-        output.layout = layout;
+        output.layout = &node.data;
         server.root.applyPending();
     }
 }
@@ -75,17 +71,17 @@ pub fn create(client: *wl.Client, version: u32, id: u32, output: *Output, namesp
 fn namespaceInUse(namespace: []const u8, output: *Output, client: *wl.Client) bool {
     var output_it = server.root.active_outputs.iterator(.forward);
     while (output_it.next()) |o| {
-        var layout_it = output.layouts.iterator(.forward);
+        var layout_it = output.layouts.first;
         if (o == output) {
             // On this output, no other layout can have our namespace.
-            while (layout_it.next()) |layout| {
-                if (mem.eql(u8, namespace, layout.namespace)) return true;
+            while (layout_it) |layout_node| : (layout_it = layout_node.next) {
+                if (mem.eql(u8, namespace, layout_node.data.namespace)) return true;
             }
         } else {
             // Layouts on other outputs may share the namespace, if they come from the same client.
-            while (layout_it.next()) |layout| {
-                if (mem.eql(u8, namespace, layout.namespace) and
-                    client != layout.layout_v3.getClient()) return true;
+            while (layout_it) |layout_node| : (layout_it = layout_node.next) {
+                if (mem.eql(u8, namespace, layout_node.data.namespace) and
+                    client != layout_node.data.layout_v3.getClient()) return true;
             }
         }
     }
@@ -189,7 +185,9 @@ pub fn destroy(layout: *Layout) void {
         .{ layout.namespace, layout.output.wlr_output.name },
     );
 
-    layout.link.remove();
+    // Remove layout from the list
+    const node: *std.TailQueue(Layout).Node = @fieldParentPtr("data", layout);
+    layout.output.layouts.remove(node);
 
     // If we are the currently active layout of an output, clean up.
     if (layout.output.layout == layout) {
@@ -210,5 +208,5 @@ pub fn destroy(layout: *Layout) void {
     layout.layout_v3.setHandler(?*anyopaque, handleRequestInert, null, null);
 
     util.gpa.free(layout.namespace);
-    util.gpa.destroy(layout);
+    util.gpa.destroy(node);
 }

river/LayoutManager.zig

@@ -68,7 +68,7 @@ fn handleRequest(
         .get_layout => |req| {
             // Ignore if the output is inert
             const wlr_output = wlr.Output.fromWlOutput(req.output) orelse return;
-            const output: *Output = @ptrCast(@alignCast(wlr_output.data));
+            const output: *Output = @ptrFromInt(wlr_output.data);
 
             log.debug("bind layout '{s}' on output '{s}'", .{ req.namespace, output.wlr_output.name });
 

river/LockManager.zig

@@ -110,8 +110,9 @@ fn handleLock(listener: *wl.Listener(*wlr.SessionLockV1), lock: *wlr.SessionLock
         };
 
         {
-            var it = server.input_manager.seats.iterator(.forward);
-            while (it.next()) |seat| {
+            var it = server.input_manager.seats.first;
+            while (it) |node| : (it = node.next) {
+                const seat = &node.data;
                 seat.setFocusRaw(.none);
 
                 // Enter locked mode
@@ -212,8 +213,9 @@ fn handleUnlock(listener: *wl.Listener(void)) void {
     }
 
     {
-        var it = server.input_manager.seats.iterator(.forward);
-        while (it.next()) |seat| {
+        var it = server.input_manager.seats.first;
+        while (it) |node| : (it = node.next) {
+            const seat = &node.data;
             seat.setFocusRaw(.none);
 
             // Exit locked mode
@@ -264,7 +266,7 @@ pub fn updateLockSurfaceSize(manager: *LockManager, output: *Output) void {
 
     var it = lock.surfaces.iterator(.forward);
     while (it.next()) |wlr_lock_surface| {
-        const lock_surface: *LockSurface = @ptrCast(@alignCast(wlr_lock_surface.data));
+        const lock_surface: *LockSurface = @ptrFromInt(wlr_lock_surface.data);
         if (output == lock_surface.getOutput()) {
             lock_surface.configure();
         }

river/LockSurface.zig

@@ -44,7 +44,7 @@ pub fn create(wlr_lock_surface: *wlr.SessionLockSurfaceV1, lock: *wlr.SessionLoc
         .wlr_lock_surface = wlr_lock_surface,
         .lock = lock,
     };
-    wlr_lock_surface.data = lock_surface;
+    wlr_lock_surface.data = @intFromPtr(lock_surface);
 
     const output = lock_surface.getOutput();
     const tree = try output.locked_content.createSceneSubsurfaceTree(wlr_lock_surface.surface);
@@ -52,7 +52,7 @@ pub fn create(wlr_lock_surface: *wlr.SessionLockSurfaceV1, lock: *wlr.SessionLoc
 
     try SceneNodeData.attach(&tree.node, .{ .lock_surface = lock_surface });
 
-    wlr_lock_surface.surface.data = &tree.node;
+    wlr_lock_surface.surface.data = @intFromPtr(&tree.node);
 
     wlr_lock_surface.surface.events.map.add(&lock_surface.map);
     wlr_lock_surface.events.destroy.add(&lock_surface.surface_destroy);
@@ -65,11 +65,12 @@ pub fn destroy(lock_surface: *LockSurface) void {
         var surface_it = lock_surface.lock.surfaces.iterator(.forward);
         const new_focus: Seat.FocusTarget = while (surface_it.next()) |surface| {
             if (surface != lock_surface.wlr_lock_surface)
-                break .{ .lock_surface = @ptrCast(@alignCast(surface.data)) };
+                break .{ .lock_surface = @ptrFromInt(surface.data) };
         } else .none;
 
-        var seat_it = server.input_manager.seats.iterator(.forward);
-        while (seat_it.next()) |seat| {
+        var seat_it = server.input_manager.seats.first;
+        while (seat_it) |node| : (seat_it = node.next) {
+            const seat = &node.data;
             if (seat.focused == .lock_surface and seat.focused.lock_surface == lock_surface) {
                 seat.setFocusRaw(new_focus);
             }
@@ -85,13 +86,13 @@ pub fn destroy(lock_surface: *LockSurface) void {
     lock_surface.surface_destroy.link.remove();
 
     // The wlr_surface may outlive the wlr_lock_surface so we must clean up the user data.
-    lock_surface.wlr_lock_surface.surface.data = null;
+    lock_surface.wlr_lock_surface.surface.data = 0;
 
     util.gpa.destroy(lock_surface);
 }
 
 pub fn getOutput(lock_surface: *LockSurface) *Output {
-    return @ptrCast(@alignCast(lock_surface.wlr_lock_surface.output.data));
+    return @ptrFromInt(lock_surface.wlr_lock_surface.output.data);
 }
 
 pub fn configure(lock_surface: *LockSurface) void {
@@ -121,8 +122,9 @@ fn handleMap(listener: *wl.Listener(void)) void {
 }
 
 fn updateFocus(lock_surface: *LockSurface) void {
-    var it = server.input_manager.seats.iterator(.forward);
-    while (it.next()) |seat| {
+    var it = server.input_manager.seats.first;
+    while (it) |node| : (it = node.next) {
+        const seat = &node.data;
         if (seat.focused != .lock_surface) {
             seat.setFocusRaw(.{ .lock_surface = lock_surface });
         }

river/Output.zig

@@ -125,6 +125,10 @@ lock_render_state: enum {
     lock_surface,
 } = .blanked,
 
+/// Set to true if a gamma control client makes a set gamma request.
+/// This request is handled while rendering the next frame in handleFrame().
+gamma_dirty: bool = false,
+
 /// The state of the output that is directly acted upon/modified through user input.
 ///
 /// Pending state will be copied to the inflight state and communicated to clients
@@ -167,7 +171,7 @@ previous_tags: u32 = 1 << 0,
 attach_mode: ?Config.AttachMode = null,
 
 /// List of all layouts
-layouts: wl.list.Head(Layout, .link),
+layouts: std.TailQueue(Layout) = .{},
 
 /// The current layout namespace of the output. If null,
 /// config.default_layout_namespace should be used instead.
@@ -290,11 +294,8 @@ pub fn create(wlr_output: *wlr.Output) !void {
             .height = height,
         },
         .status = undefined,
-        .layouts = undefined,
     };
-    wlr_output.data = output;
-
-    output.layouts.init();
+    wlr_output.data = @intFromPtr(output);
 
     output.pending.focus_stack.init();
     output.pending.wm_stack.init();
@@ -363,7 +364,7 @@ fn sendLayerConfigures(
         var it = tree.children.safeIterator(.forward);
         while (it.next()) |node| {
             assert(node.type == .tree);
-            if (@as(?*SceneNodeData, @ptrCast(@alignCast(node.data)))) |node_data| {
+            if (@as(?*SceneNodeData, @ptrFromInt(node.data))) |node_data| {
                 const layer_surface = node_data.data.layer_surface;
 
                 if (!layer_surface.wlr_layer_surface.initialized) continue;
@@ -419,7 +420,7 @@ fn handleDestroy(listener: *wl.Listener(*wlr.Output), _: *wlr.Output) void {
     assert(output.inflight.focus_stack.empty());
     assert(output.inflight.wm_stack.empty());
     assert(output.inflight.layout_demand == null);
-    assert(output.layouts.length() == 0);
+    assert(output.layouts.len == 0);
 
     output.all_link.remove();
 
@@ -432,7 +433,7 @@ fn handleDestroy(listener: *wl.Listener(*wlr.Output), _: *wlr.Output) void {
 
     if (output.layout_namespace) |namespace| util.gpa.free(namespace);
 
-    output.wlr_output.data = null;
+    output.wlr_output.data = 0;
 
     util.gpa.destroy(output);
 
@@ -455,7 +456,7 @@ fn handleRequestState(listener: *wl.Listener(*wlr.Output.event.RequestState), ev
 // TODO double buffer output state changes for frame perfection and cleaner code.
 // Schedule a frame and commit in the frame handler.
 // Get rid of this function.
-pub fn applyState(output: *Output, state: *const wlr.Output.State) error{CommitFailed}!void {
+pub fn applyState(output: *Output, state: *wlr.Output.State) error{CommitFailed}!void {
 
     // We need to be precise about this state change to make assertions
     // in updateLockRenderStateOnEnableDisable() possible.
@@ -479,6 +480,7 @@ pub fn applyState(output: *Output, state: *const wlr.Output.State) error{CommitF
 
 fn handleEnableDisable(output: *Output) void {
     output.updateLockRenderStateOnEnableDisable();
+    output.gamma_dirty = true;
 
     if (output.wlr_output.enabled) {
         // Add the output to root.active_outputs and the output layout if it has not
@@ -530,21 +532,44 @@ fn handleFrame(listener: *wl.Listener(*wlr.Output), _: *wlr.Output) void {
 
     // TODO this should probably be retried on failure
     output.renderAndCommit(scene_output) catch |err| switch (err) {
+        error.OutOfMemory => log.err("out of memory", .{}),
         error.CommitFailed => log.err("output commit failed for {s}", .{output.wlr_output.name}),
     };
 
-    var now = posix.clock_gettime(.MONOTONIC) catch @panic("CLOCK_MONOTONIC not supported");
+    var now: posix.timespec = undefined;
+    posix.clock_gettime(posix.CLOCK.MONOTONIC, &now) catch @panic("CLOCK_MONOTONIC not supported");
     scene_output.sendFrameDone(&now);
 }
 
 fn renderAndCommit(output: *Output, scene_output: *wlr.SceneOutput) !void {
-    if (!scene_output.needsFrame()) return;
+    // TODO(wlroots): replace this with wlr_scene_output_needs_frame()
+    if (!output.wlr_output.needs_frame and !output.gamma_dirty and
+        !scene_output.pending_commit_damage.notEmpty())
+    {
+        return;
+    }
 
     var state = wlr.Output.State.init();
     defer state.finish();
 
     if (!scene_output.buildState(&state, null)) return error.CommitFailed;
 
+    if (output.gamma_dirty) {
+        const control = server.root.gamma_control_manager.getControl(output.wlr_output);
+        if (!wlr.GammaControlV1.apply(control, &state)) return error.OutOfMemory;
+
+        // TODO(wlroots): remove this isHeadless() workaround after upstream fix is available
+        // in a release: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4868
+        if (!output.wlr_output.testState(&state) or output.wlr_output.isHeadless()) {
+            wlr.GammaControlV1.sendFailedAndDestroy(control);
+            state.clearGammaLut();
+            // If the backend does not support gamma LUTs it will reject any
+            // state with the gamma LUT committed bit set even if the state
+            // has a null LUT. The wayland backend for example has this behavior.
+            state.committed.gamma_lut = false;
+        }
+    }
+
     if (output.current.fullscreen) |fullscreen| {
         if (fullscreen.allowTearing()) {
             state.tearing_page_flip = true;
@@ -559,6 +584,8 @@ fn renderAndCommit(output: *Output, scene_output: *wlr.SceneOutput) !void {
 
     if (!output.wlr_output.commitState(&state)) return error.CommitFailed;
 
+    output.gamma_dirty = false;
+
     if (server.lock_manager.state == .locked or
         (server.lock_manager.state == .waiting_for_lock_surfaces and output.locked_content.node.enabled) or
         server.lock_manager.state == .waiting_for_blank)
@@ -622,7 +649,7 @@ fn handlePresent(
 }
 
 fn setTitle(output: Output) void {
-    const title = fmt.allocPrintSentinel(util.gpa, "river - {s}", .{output.wlr_output.name}, 0) catch return;
+    const title = fmt.allocPrintZ(util.gpa, "river - {s}", .{output.wlr_output.name}) catch return;
     defer util.gpa.free(title);
     if (output.wlr_output.isWl()) {
         output.wlr_output.wlSetTitle(title);
@@ -634,9 +661,9 @@ fn setTitle(output: Output) void {
 pub fn handleLayoutNamespaceChange(output: *Output) void {
     // The user changed the layout namespace of this output. Try to find a
     // matching layout.
-    var it = output.layouts.iterator(.forward);
-    output.layout = while (it.next()) |layout| {
-        if (mem.eql(u8, output.layoutNamespace(), layout.namespace)) break layout;
+    var it = output.layouts.first;
+    output.layout = while (it) |node| : (it = node.next) {
+        if (mem.eql(u8, output.layoutNamespace(), node.data.namespace)) break &node.data;
     } else null;
     server.root.applyPending();
 }

river/PointerConstraint.zig

@@ -47,7 +47,7 @@ commit: wl.Listener(*wlr.Surface) = wl.Listener(*wlr.Surface).init(handleCommit)
 node_destroy: wl.Listener(void) = wl.Listener(void).init(handleNodeDestroy),
 
 pub fn create(wlr_constraint: *wlr.PointerConstraintV1) error{OutOfMemory}!void {
-    const seat: *Seat = @ptrCast(@alignCast(wlr_constraint.seat.data));
+    const seat: *Seat = @ptrFromInt(wlr_constraint.seat.data);
 
     const constraint = try util.gpa.create(PointerConstraint);
     errdefer util.gpa.destroy(constraint);
@@ -55,7 +55,7 @@ pub fn create(wlr_constraint: *wlr.PointerConstraintV1) error{OutOfMemory}!void
     constraint.* = .{
         .wlr_constraint = wlr_constraint,
     };
-    wlr_constraint.data = constraint;
+    wlr_constraint.data = @intFromPtr(constraint);
 
     wlr_constraint.events.destroy.add(&constraint.destroy);
     wlr_constraint.surface.events.commit.add(&constraint.commit);
@@ -70,7 +70,7 @@ pub fn create(wlr_constraint: *wlr.PointerConstraintV1) error{OutOfMemory}!void
 }
 
 pub fn maybeActivate(constraint: *PointerConstraint) void {
-    const seat: *Seat = @ptrCast(@alignCast(constraint.wlr_constraint.seat.data));
+    const seat: *Seat = @ptrFromInt(constraint.wlr_constraint.seat.data);
 
     assert(seat.cursor.constraint == constraint);
 
@@ -102,7 +102,7 @@ pub fn maybeActivate(constraint: *PointerConstraint) void {
 
 /// Called when the cursor position or content in the scene graph changes
 pub fn updateState(constraint: *PointerConstraint) void {
-    const seat: *Seat = @ptrCast(@alignCast(constraint.wlr_constraint.seat.data));
+    const seat: *Seat = @ptrFromInt(constraint.wlr_constraint.seat.data);
 
     constraint.maybeActivate();
 
@@ -154,7 +154,7 @@ pub fn confine(constraint: *PointerConstraint, dx: *f64, dy: *f64) void {
 }
 
 pub fn deactivate(constraint: *PointerConstraint) void {
-    const seat: *Seat = @ptrCast(@alignCast(constraint.wlr_constraint.seat.data));
+    const seat: *Seat = @ptrFromInt(constraint.wlr_constraint.seat.data);
 
     assert(seat.cursor.constraint == constraint);
     assert(constraint.state == .active);
@@ -167,7 +167,7 @@ pub fn deactivate(constraint: *PointerConstraint) void {
 }
 
 fn warpToHintIfSet(constraint: *PointerConstraint) void {
-    const seat: *Seat = @ptrCast(@alignCast(constraint.wlr_constraint.seat.data));
+    const seat: *Seat = @ptrFromInt(constraint.wlr_constraint.seat.data);
 
     if (constraint.wlr_constraint.current.cursor_hint.enabled) {
         var lx: i32 = undefined;
@@ -190,7 +190,7 @@ fn handleNodeDestroy(listener: *wl.Listener(void)) void {
 
 fn handleDestroy(listener: *wl.Listener(*wlr.PointerConstraintV1), _: *wlr.PointerConstraintV1) void {
     const constraint: *PointerConstraint = @fieldParentPtr("destroy", listener);
-    const seat: *Seat = @ptrCast(@alignCast(constraint.wlr_constraint.seat.data));
+    const seat: *Seat = @ptrFromInt(constraint.wlr_constraint.seat.data);
 
     if (constraint.state == .active) {
         // We can't simply call deactivate() here as it calls sendDeactivated(),
@@ -215,7 +215,7 @@ fn handleDestroy(listener: *wl.Listener(*wlr.PointerConstraintV1), _: *wlr.Point
 // the surface changes.
 fn handleCommit(listener: *wl.Listener(*wlr.Surface), _: *wlr.Surface) void {
     const constraint: *PointerConstraint = @fieldParentPtr("commit", listener);
-    const seat: *Seat = @ptrCast(@alignCast(constraint.wlr_constraint.seat.data));
+    const seat: *Seat = @ptrFromInt(constraint.wlr_constraint.seat.data);
 
     switch (constraint.state) {
         .active => |state| {

river/Root.zig

@@ -97,6 +97,8 @@ power_manager_set_mode: wl.Listener(*wlr.OutputPowerManagerV1.event.SetMode) =
     wl.Listener(*wlr.OutputPowerManagerV1.event.SetMode).init(handlePowerManagerSetMode),
 
 gamma_control_manager: *wlr.GammaControlManagerV1,
+gamma_control_set_gamma: wl.Listener(*wlr.GammaControlManagerV1.event.SetGamma) =
+    wl.Listener(*wlr.GammaControlManagerV1.event.SetGamma).init(handleSetGamma),
 
 /// A list of all outputs
 all_outputs: wl.list.Head(Output, .all_link),
@@ -121,11 +123,6 @@ pub fn init(root: *Root) !void {
     const scene = try wlr.Scene.create();
     errdefer scene.tree.node.destroy();
 
-    const gamma_control_manager = try wlr.GammaControlManagerV1.create(server.wl_server);
-    scene.setGammaControlManagerV1(gamma_control_manager);
-
-    if (server.linux_dmabuf) |linux_dmabuf| scene.setLinuxDmabufV1(linux_dmabuf);
-
     const interactive_content = try scene.tree.createSceneTree();
     const drag_icons = try scene.tree.createSceneTree();
     const hidden_tree = try scene.tree.createSceneTree();
@@ -166,11 +163,11 @@ pub fn init(root: *Root) !void {
         .all_outputs = undefined,
         .active_outputs = undefined,
 
-        .presentation = try wlr.Presentation.create(server.wl_server, server.backend, 2),
+        .presentation = try wlr.Presentation.create(server.wl_server, server.backend),
         .xdg_output_manager = try wlr.XdgOutputManagerV1.create(server.wl_server, output_layout),
         .output_manager = try wlr.OutputManagerV1.create(server.wl_server),
         .power_manager = try wlr.OutputPowerManagerV1.create(server.wl_server),
-        .gamma_control_manager = gamma_control_manager,
+        .gamma_control_manager = try wlr.GammaControlManagerV1.create(server.wl_server),
         .transaction_timeout = transaction_timeout,
     };
     root.hidden.pending.focus_stack.init();
@@ -190,14 +187,10 @@ pub fn init(root: *Root) !void {
     root.output_manager.events.@"test".add(&root.manager_test);
     root.output_layout.events.change.add(&root.layout_change);
     root.power_manager.events.set_mode.add(&root.power_manager_set_mode);
+    root.gamma_control_manager.events.set_gamma.add(&root.gamma_control_set_gamma);
 }
 
 pub fn deinit(root: *Root) void {
-    root.manager_apply.link.remove();
-    root.manager_test.link.remove();
-    root.layout_change.link.remove();
-    root.power_manager_set_mode.link.remove();
-
     root.output_layout.destroy();
     root.transaction_timeout.remove();
 }
@@ -330,15 +323,16 @@ pub fn deactivateOutput(root: *Root, output: *Output) void {
         var it = tree.children.safeIterator(.forward);
         while (it.next()) |scene_node| {
             assert(scene_node.type == .tree);
-            if (@as(?*SceneNodeData, @ptrCast(@alignCast(scene_node.data)))) |node_data| {
+            if (@as(?*SceneNodeData, @ptrFromInt(scene_node.data))) |node_data| {
                 node_data.data.layer_surface.wlr_layer_surface.destroy();
             }
         }
     }
 
     // If any seat has the removed output focused, focus the fallback one
-    var seat_it = server.input_manager.seats.iterator(.forward);
-    while (seat_it.next()) |seat| {
+    var seat_it = server.input_manager.seats.first;
+    while (seat_it) |seat_node| : (seat_it = seat_node.next) {
+        const seat = &seat_node.data;
         if (seat.focused_output == output) {
             seat.focusOutput(fallback_output);
         }
@@ -352,7 +346,7 @@ pub fn deactivateOutput(root: *Root, output: *Output) void {
         output.inflight.layout_demand = null;
         root.notifyLayoutDemandDone();
     }
-    while (output.layouts.first()) |layout| layout.destroy();
+    while (output.layouts.first) |node| node.data.destroy();
 
     // We must call reconfigureDevices here to unmap devices that might be mapped to this output
     // in order to prevent a segfault in wlroots.
@@ -396,8 +390,9 @@ pub fn activateOutput(root: *Root, output: *Output) void {
         }
         {
             // Focus the new output with all seats
-            var it = server.input_manager.seats.iterator(.forward);
-            while (it.next()) |seat| {
+            var it = server.input_manager.seats.first;
+            while (it) |seat_node| : (it = seat_node.next) {
+                const seat = &seat_node.data;
                 seat.focusOutput(output);
             }
         }
@@ -433,8 +428,8 @@ pub fn applyPending(root: *Root) void {
         // state consistent. Instead of having focus(null) calls spread all
         // around the codebase and risk forgetting one, always ensure focus
         // state is synchronized here.
-        var it = server.input_manager.seats.iterator(.forward);
-        while (it.next()) |seat| seat.focus(null);
+        var it = server.input_manager.seats.first;
+        while (it) |node| : (it = node.next) node.data.focus(null);
     }
 
     // If there is already a transaction inflight, wait until it completes.
@@ -544,9 +539,11 @@ pub fn applyPending(root: *Root) void {
     }
 
     {
-        var it = server.input_manager.seats.iterator(.forward);
-        while (it.next()) |seat| {
-            switch (seat.cursor.mode) {
+        var it = server.input_manager.seats.first;
+        while (it) |node| : (it = node.next) {
+            const cursor = &node.data.cursor;
+
+            switch (cursor.mode) {
                 .passthrough, .down => {},
                 inline .move, .resize => |data| {
                     if (data.view.inflight.output == null or
@@ -554,14 +551,14 @@ pub fn applyPending(root: *Root) void {
                         (!data.view.inflight.float and data.view.inflight.output.?.layout != null) or
                         data.view.inflight.fullscreen)
                     {
-                        seat.cursor.mode = .passthrough;
+                        cursor.mode = .passthrough;
                         data.view.pending.resizing = false;
                         data.view.inflight.resizing = false;
                     }
                 },
             }
 
-            seat.cursor.inflight_mode = seat.cursor.mode;
+            cursor.inflight_mode = cursor.mode;
         }
     }
 
@@ -706,8 +703,11 @@ fn commitTransaction(root: *Root) void {
     }
 
     {
-        var it = server.input_manager.seats.iterator(.forward);
-        while (it.next()) |seat| seat.cursor.updateState();
+        var it = server.input_manager.seats.first;
+        while (it) |node| : (it = node.next) {
+            node.data.cursor.updateState();
+            node.data.sendFocusedView();
+        }
     }
 
     {
@@ -798,7 +798,7 @@ fn processOutputConfig(
     var it = config.heads.iterator(.forward);
     while (it.next()) |head| {
         const wlr_output = head.state.output;
-        const output: *Output = @ptrCast(@alignCast(wlr_output.data));
+        const output: *Output = @ptrFromInt(wlr_output.data);
 
         var proposed_state = wlr.Output.State.init();
         head.state.apply(&proposed_state);
@@ -850,7 +850,7 @@ fn handlePowerManagerSetMode(
     event: *wlr.OutputPowerManagerV1.event.SetMode,
 ) void {
     // The output may have been destroyed, in which case there is nothing to do
-    const output: *Output = @ptrCast(@alignCast(event.output.data orelse return));
+    const output = @as(?*Output, @ptrFromInt(event.output.data)) orelse return;
 
     std.log.debug("client requested dpms {s} for output {s}", .{
         @tagName(event.mode),
@@ -880,4 +880,18 @@ fn handlePowerManagerSetMode(
     }
 
     output.updateLockRenderStateOnEnableDisable();
+    output.gamma_dirty = true;
+}
+
+fn handleSetGamma(
+    _: *wl.Listener(*wlr.GammaControlManagerV1.event.SetGamma),
+    event: *wlr.GammaControlManagerV1.event.SetGamma,
+) void {
+    // The output may have been destroyed, in which case there is nothing to do
+    const output = @as(?*Output, @ptrFromInt(event.output.data)) orelse return;
+
+    std.log.debug("client requested to set gamma", .{});
+
+    output.gamma_dirty = true;
+    output.wlr_output.scheduleFrame();
 }

river/SceneNodeData.zig

@@ -46,7 +46,7 @@ pub fn attach(node: *wlr.SceneNode, data: Data) error{OutOfMemory}!void {
         .node = node,
         .data = data,
     };
-    node.data = scene_node_data;
+    node.data = @intFromPtr(scene_node_data);
 
     node.events.destroy.add(&scene_node_data.destroy);
 }
@@ -54,7 +54,7 @@ pub fn attach(node: *wlr.SceneNode, data: Data) error{OutOfMemory}!void {
 pub fn fromNode(node: *wlr.SceneNode) ?*SceneNodeData {
     var n = node;
     while (true) {
-        if (@as(?*SceneNodeData, @ptrCast(@alignCast(n.data)))) |scene_node_data| {
+        if (@as(?*SceneNodeData, @ptrFromInt(n.data))) |scene_node_data| {
             return scene_node_data;
         }
         if (n.parent) |parent_tree| {
@@ -66,7 +66,7 @@ pub fn fromNode(node: *wlr.SceneNode) ?*SceneNodeData {
 }
 
 pub fn fromSurface(surface: *wlr.Surface) ?*SceneNodeData {
-    if (@as(?*wlr.SceneNode, @ptrCast(@alignCast(surface.getRootSurface().data)))) |node| {
+    if (@as(?*wlr.SceneNode, @ptrFromInt(surface.getRootSurface().data))) |node| {
         return fromNode(node);
     }
     return null;
@@ -76,7 +76,7 @@ fn handleDestroy(listener: *wl.Listener(void)) void {
     const scene_node_data: *SceneNodeData = @fieldParentPtr("destroy", listener);
 
     scene_node_data.destroy.link.remove();
-    scene_node_data.node.data = null;
+    scene_node_data.node.data = 0;
 
     util.gpa.destroy(scene_node_data);
 }

river/Seat.zig

@@ -91,7 +91,7 @@ focused_output: ?*Output = null,
 focused: FocusTarget = .none,
 
 /// List of status tracking objects relaying changes to this seat to clients.
-status_trackers: wl.list.Head(SeatStatus, .link),
+status_trackers: std.SinglyLinkedList(SeatStatus) = .{},
 
 /// The currently in progress drag operation type.
 drag: enum {
@@ -109,13 +109,7 @@ drag_destroy: wl.Listener(*wlr.Drag) = wl.Listener(*wlr.Drag).init(handleDragDes
 request_set_primary_selection: wl.Listener(*wlr.Seat.event.RequestSetPrimarySelection) =
     wl.Listener(*wlr.Seat.event.RequestSetPrimarySelection).init(handleRequestSetPrimarySelection),
 
-// InputManager.seats
-link: wl.list.Link = undefined,
-
-pub fn create(name: [*:0]const u8) !void {
-    const seat = try util.gpa.create(Seat);
-    errdefer util.gpa.destroy(seat);
-
+pub fn init(seat: *Seat, name: [*:0]const u8) !void {
     const event_loop = server.wl_server.getEventLoop();
     const mapping_repeat_timer = try event_loop.addTimer(*Seat, handleMappingRepeatTimeout, seat);
     errdefer mapping_repeat_timer.remove();
@@ -127,18 +121,13 @@ pub fn create(name: [*:0]const u8) !void {
         .relay = undefined,
         .mapping_repeat_timer = mapping_repeat_timer,
         .keyboard_group = try wlr.KeyboardGroup.create(),
-        .status_trackers = undefined,
-        .link = undefined,
     };
-    seat.wlr_seat.data = seat;
-
-    server.input_manager.seats.append(seat);
-    seat.status_trackers.init();
+    seat.wlr_seat.data = @intFromPtr(seat);
 
     try seat.cursor.init(seat);
     seat.relay.init();
 
-    try seat.tryAddDevice(&seat.keyboard_group.keyboard.base, false);
+    try seat.tryAddDevice(&seat.keyboard_group.keyboard.base);
 
     seat.wlr_seat.events.request_set_selection.add(&seat.request_set_selection);
     seat.wlr_seat.events.request_start_drag.add(&seat.request_start_drag);
@@ -146,7 +135,7 @@ pub fn create(name: [*:0]const u8) !void {
     seat.wlr_seat.events.request_set_primary_selection.add(&seat.request_set_primary_selection);
 }
 
-pub fn destroy(seat: *Seat) void {
+pub fn deinit(seat: *Seat) void {
     {
         var it = server.input_manager.devices.iterator(.forward);
         while (it.next()) |device| assert(device.seat != seat);
@@ -162,10 +151,6 @@ pub fn destroy(seat: *Seat) void {
     seat.start_drag.link.remove();
     if (seat.drag != .none) seat.drag_destroy.link.remove();
     seat.request_set_primary_selection.link.remove();
-
-    seat.link.remove();
-
-    util.gpa.destroy(seat);
 }
 
 /// Set the current focus. If a visible view is passed it will be focused.
@@ -304,7 +289,7 @@ pub fn setFocusRaw(seat: *Seat, new_focus: FocusTarget) void {
             if (seat.cursor.constraint) |constraint| {
                 assert(constraint.wlr_constraint == wlr_constraint);
             } else {
-                seat.cursor.constraint = @ptrCast(@alignCast(wlr_constraint.data));
+                seat.cursor.constraint = @ptrFromInt(wlr_constraint.data);
                 assert(seat.cursor.constraint != null);
             }
         }
@@ -315,10 +300,7 @@ pub fn setFocusRaw(seat: *Seat, new_focus: FocusTarget) void {
     seat.cursor.may_need_warp = true;
 
     // Inform any clients tracking status of the change
-    var it = seat.status_trackers.iterator(.forward);
-    while (it.next()) |tracker| {
-        tracker.sendFocusedView();
-    }
+    seat.sendFocusedView();
 }
 
 /// Send keyboard enter/leave events and handle pointer constraints
@@ -334,17 +316,16 @@ pub fn keyboardEnterOrLeave(seat: *Seat, target_surface: ?*wlr.Surface) void {
 
 fn keyboardNotifyEnter(seat: *Seat, wlr_surface: *wlr.Surface) void {
     if (seat.wlr_seat.getKeyboard()) |wlr_keyboard| {
-        const keyboard: *Keyboard = @ptrCast(@alignCast(wlr_keyboard.data));
+        const keyboard: *Keyboard = @ptrFromInt(wlr_keyboard.data);
 
-        var buffer: [Keyboard.Pressed.capacity]u32 = undefined;
-        var keycodes: std.ArrayList(u32) = .initBuffer(&buffer);
-        for (keyboard.pressed.slice()) |item| {
+        var keycodes: std.BoundedArray(u32, Keyboard.Pressed.capacity) = .{};
+        for (keyboard.pressed.keys.constSlice()) |item| {
             if (item.consumer == .focus) keycodes.appendAssumeCapacity(item.code);
         }
 
         seat.wlr_seat.keyboardNotifyEnter(
             wlr_surface,
-            keycodes.items,
+            keycodes.constSlice(),
             &wlr_keyboard.modifiers,
         );
     } else {
@@ -357,15 +338,15 @@ pub fn focusOutput(seat: *Seat, output: ?*Output) void {
     if (seat.focused_output == output) return;
 
     if (seat.focused_output) |old| {
-        var it = seat.status_trackers.iterator(.forward);
-        while (it.next()) |tracker| tracker.sendOutput(old, .unfocused);
+        var it = seat.status_trackers.first;
+        while (it) |node| : (it = node.next) node.data.sendOutput(old, .unfocused);
     }
 
     seat.focused_output = output;
 
     if (seat.focused_output) |new| {
-        var it = seat.status_trackers.iterator(.forward);
-        while (it.next()) |tracker| tracker.sendOutput(new, .focused);
+        var it = seat.status_trackers.first;
+        while (it) |node| : (it = node.next) node.data.sendOutput(new, .focused);
     }
 
     // Depending on configuration and cursor position, changing output focus
@@ -380,9 +361,9 @@ pub fn handleActivity(seat: Seat) void {
 pub fn enterMode(seat: *Seat, mode_id: u32) void {
     seat.mode_id = mode_id;
 
-    var it = seat.status_trackers.iterator(.forward);
-    while (it.next()) |tracker| {
-        tracker.sendMode(server.config.modes.items[mode_id].name);
+    var it = seat.status_trackers.first;
+    while (it) |node| : (it = node.next) {
+        node.data.sendMode(server.config.modes.items[mode_id].name);
     }
 }
 
@@ -476,8 +457,8 @@ pub fn runCommand(seat: *Seat, args: []const [:0]const u8) void {
         return;
     };
     if (out) |s| {
-        var stdout = std.fs.File.stdout().writer(&.{});
-        stdout.interface.print("{s}", .{s}) catch |err| {
+        const stdout = std.io.getStdOut().writer();
+        stdout.print("{s}", .{s}) catch |err| {
             std.log.scoped(.command).err("{s}: write to stdout failed {}", .{ args[0], err });
         };
     }
@@ -503,19 +484,19 @@ fn handleMappingRepeatTimeout(seat: *Seat) c_int {
     return 0;
 }
 
-pub fn addDevice(seat: *Seat, wlr_device: *wlr.InputDevice, virtual: bool) void {
-    seat.tryAddDevice(wlr_device, virtual) catch |err| switch (err) {
+pub fn addDevice(seat: *Seat, wlr_device: *wlr.InputDevice) void {
+    seat.tryAddDevice(wlr_device) catch |err| switch (err) {
         error.OutOfMemory => log.err("out of memory", .{}),
     };
 }
 
-fn tryAddDevice(seat: *Seat, wlr_device: *wlr.InputDevice, virtual: bool) !void {
+fn tryAddDevice(seat: *Seat, wlr_device: *wlr.InputDevice) !void {
     switch (wlr_device.type) {
         .keyboard => {
             const keyboard = try util.gpa.create(Keyboard);
             errdefer util.gpa.destroy(keyboard);
 
-            try keyboard.init(seat, wlr_device, virtual);
+            try keyboard.init(seat, wlr_device);
 
             seat.wlr_seat.setKeyboard(keyboard.device.wlr_device.toKeyboard());
             if (seat.wlr_seat.keyboard_state.focused_surface) |wlr_surface| {

river/SeatStatus.zig

@@ -33,19 +33,8 @@ const View = @import("View.zig");
 seat: *Seat,
 seat_status_v1: *zriver.SeatStatusV1,
 
-link: wl.list.Link,
-
-pub fn create(seat: *Seat, seat_status_v1: *zriver.SeatStatusV1) !void {
-    const seat_status = try util.gpa.create(SeatStatus);
-    errdefer util.gpa.destroy(seat_status);
-
-    seat_status.* = .{
-        .seat = seat,
-        .seat_status_v1 = seat_status_v1,
-        .link = undefined,
-    };
-    seat.status_trackers.append(seat_status);
-    errdefer comptime unreachable;
+pub fn init(seat_status: *SeatStatus, seat: *Seat, seat_status_v1: *zriver.SeatStatusV1) void {
+    seat_status.* = .{ .seat = seat, .seat_status_v1 = seat_status_v1 };
 
     seat_status_v1.setHandler(*SeatStatus, handleRequest, handleDestroy, seat_status);
 
@@ -62,8 +51,9 @@ fn handleRequest(seat_status_v1: *zriver.SeatStatusV1, request: zriver.SeatStatu
 }
 
 fn handleDestroy(_: *zriver.SeatStatusV1, seat_status: *SeatStatus) void {
-    seat_status.link.remove();
-    util.gpa.destroy(seat_status);
+    const node: *std.SinglyLinkedList(SeatStatus).Node = @fieldParentPtr("data", seat_status);
+    seat_status.seat.status_trackers.remove(node);
+    util.gpa.destroy(node);
 }
 
 pub fn sendOutput(seat_status: SeatStatus, output: *Output, state: enum { focused, unfocused }) void {

river/Server.zig

@@ -24,7 +24,7 @@ const posix = std.posix;
 const wlr = @import("wlroots");
 const wl = @import("wayland").server.wl;
 
-const c = @import("c.zig").c;
+const c = @import("c.zig");
 const util = @import("util.zig");
 
 const Config = @import("Config.zig");
@@ -61,8 +61,8 @@ allocator: *wlr.Allocator,
 security_context_manager: *wlr.SecurityContextManagerV1,
 
 shm: *wlr.Shm,
+drm: ?*wlr.Drm = null,
 linux_dmabuf: ?*wlr.LinuxDmabufV1 = null,
-linux_drm_syncobj_manager: ?*wlr.LinuxDrmSyncobjManagerV1 = null,
 single_pixel_buffer_manager: *wlr.SinglePixelBufferManagerV1,
 
 viewporter: *wlr.Viewporter,
@@ -85,8 +85,6 @@ screencopy_manager: *wlr.ScreencopyManagerV1,
 
 foreign_toplevel_manager: *wlr.ForeignToplevelManagerV1,
 
-foreign_toplevel_list: *wlr.ExtForeignToplevelListV1,
-
 tearing_control_manager: *wlr.TearingControlManagerV1,
 
 alpha_modifier: *wlr.AlphaModifierV1,
@@ -166,8 +164,6 @@ pub fn init(server: *Server, runtime_xwayland: bool) !void {
 
         .foreign_toplevel_manager = try wlr.ForeignToplevelManagerV1.create(wl_server),
 
-        .foreign_toplevel_list = try wlr.ExtForeignToplevelListV1.create(wl_server, 1),
-
         .tearing_control_manager = try wlr.TearingControlManagerV1.create(wl_server, 1),
 
         .alpha_modifier = try wlr.AlphaModifierV1.create(wl_server),
@@ -184,14 +180,14 @@ pub fn init(server: *Server, runtime_xwayland: bool) !void {
     };
 
     if (renderer.getTextureFormats(@intFromEnum(wlr.BufferCap.dmabuf)) != null) {
+        // wl_drm is a legacy interface and all clients should switch to linux_dmabuf.
+        // However, enough widely used clients still rely on wl_drm that the pragmatic option
+        // is to keep it around for the near future.
+        // TODO remove wl_drm support
+        server.drm = try wlr.Drm.create(wl_server, renderer);
+
         server.linux_dmabuf = try wlr.LinuxDmabufV1.createWithRenderer(wl_server, 4, renderer);
     }
-    if (renderer.features.timeline and backend.features.timeline) {
-        const drm_fd = renderer.getDrmFd();
-        if (drm_fd >= 0) {
-            server.linux_drm_syncobj_manager = wlr.LinuxDrmSyncobjManagerV1.create(wl_server, 1, drm_fd);
-        }
-    }
 
     if (build_options.xwayland and runtime_xwayland) {
         server.xwayland = try wlr.Xwayland.create(wl_server, compositor, false);
@@ -237,8 +233,6 @@ pub fn deinit(server: *Server) void {
 
     server.wl_server.destroyClients();
 
-    server.input_manager.new_input.link.remove();
-    server.root.new_output.link.remove();
     server.backend.destroy();
 
     // The scene graph needs to be destroyed after the backend but before the renderer
@@ -299,12 +293,8 @@ fn globalFilter(client: *const wl.Client, global: *const wl.Global, server: *Ser
 
 /// Returns true if the global is allowlisted for security contexts
 fn allowlist(server: *Server, global: *const wl.Global) bool {
-    if (server.linux_dmabuf) |linux_dmabuf| {
-        if (global == linux_dmabuf.global) return true;
-    }
-    if (server.linux_drm_syncobj_manager) |linux_drm_syncobj_manager| {
-        if (global == linux_drm_syncobj_manager.global) return true;
-    }
+    if (server.drm) |drm| if (global == drm.global) return true;
+    if (server.linux_dmabuf) |linux_dmabuf| if (global == linux_dmabuf.global) return true;
 
     // We must use the getInterface() approach for dynamically created globals
     // such as wl_output and wl_seat since the wl_global_create() function will
@@ -348,7 +338,6 @@ fn blocklist(server: *Server, global: *const wl.Global) bool {
     return global == server.security_context_manager.global or
         global == server.layer_shell.global or
         global == server.foreign_toplevel_manager.global or
-        global == server.foreign_toplevel_list.global or
         global == server.screencopy_manager.global or
         global == server.export_dmabuf_manager.global or
         global == server.data_control_manager.global or
@@ -510,7 +499,7 @@ fn handleRequestSetCursorShape(
     _: *wl.Listener(*wlr.CursorShapeManagerV1.event.RequestSetShape),
     event: *wlr.CursorShapeManagerV1.event.RequestSetShape,
 ) void {
-    const seat: *Seat = @ptrCast(@alignCast(event.seat_client.seat.data));
+    const seat: *Seat = @ptrFromInt(event.seat_client.seat.data);
 
     if (event.tablet_tool) |wp_tool| {
         assert(event.device_type == .tablet_tool);

river/StatusManager.zig

@@ -69,7 +69,7 @@ fn handleRequest(
         .get_river_output_status => |req| {
             // ignore if the output is inert
             const wlr_output = wlr.Output.fromWlOutput(req.output) orelse return;
-            const output: *Output = @ptrCast(@alignCast(wlr_output.data));
+            const output: *Output = @ptrFromInt(wlr_output.data);
 
             const resource = zriver.OutputStatusV1.create(
                 status_manager_v1.getClient(),
@@ -86,7 +86,13 @@ fn handleRequest(
         .get_river_seat_status => |req| {
             // ignore if the seat is inert
             const wlr_seat = wlr.Seat.Client.fromWlSeat(req.seat) orelse return;
-            const seat: *Seat = @ptrCast(@alignCast(wlr_seat.seat.data));
+            const seat: *Seat = @ptrFromInt(wlr_seat.seat.data);
+
+            const node = util.gpa.create(std.SinglyLinkedList(SeatStatus).Node) catch {
+                status_manager_v1.getClient().postNoMemory();
+                log.err("out of memory", .{});
+                return;
+            };
 
             const seat_status = zriver.SeatStatusV1.create(
                 status_manager_v1.getClient(),
@@ -94,15 +100,13 @@ fn handleRequest(
                 req.id,
             ) catch {
                 status_manager_v1.getClient().postNoMemory();
+                util.gpa.destroy(node);
                 log.err("out of memory", .{});
                 return;
             };
 
-            SeatStatus.create(seat, seat_status) catch {
-                status_manager_v1.getClient().postNoMemory();
-                log.err("out of memory", .{});
-                return;
-            };
+            node.data.init(seat, seat_status);
+            seat.status_trackers.prepend(node);
         },
     }
 }

river/TabletTool.zig

@@ -59,7 +59,7 @@ set_cursor: wl.Listener(*wlr.TabletV2TabletTool.event.SetCursor) =
     wl.Listener(*wlr.TabletV2TabletTool.event.SetCursor).init(handleSetCursor),
 
 pub fn get(wlr_seat: *wlr.Seat, wlr_tool: *wlr.TabletTool) error{OutOfMemory}!*TabletTool {
-    if (@as(?*TabletTool, @ptrCast(@alignCast(wlr_tool.data)))) |tool| {
+    if (@as(?*TabletTool, @ptrFromInt(wlr_tool.data))) |tool| {
         return tool;
     } else {
         return TabletTool.create(wlr_seat, wlr_tool);
@@ -81,7 +81,7 @@ fn create(wlr_seat: *wlr.Seat, wlr_tool: *wlr.TabletTool) error{OutOfMemory}!*Ta
         .wlr_cursor = wlr_cursor,
     };
 
-    wlr_tool.data = tool;
+    wlr_tool.data = @intFromPtr(tool);
 
     wlr_tool.events.destroy.add(&tool.destroy);
     tool.wp_tool.events.set_cursor.add(&tool.set_cursor);
@@ -92,7 +92,7 @@ fn create(wlr_seat: *wlr.Seat, wlr_tool: *wlr.TabletTool) error{OutOfMemory}!*Ta
 fn handleDestroy(listener: *wl.Listener(*wlr.TabletTool), _: *wlr.TabletTool) void {
     const tool: *TabletTool = @fieldParentPtr("destroy", listener);
 
-    tool.wp_tool.wlr_tool.data = null;
+    tool.wp_tool.wlr_tool.data = 0;
 
     tool.wlr_cursor.destroy();
 

river/TextInput.zig

@@ -43,7 +43,7 @@ destroy: wl.Listener(*wlr.TextInputV3) =
     wl.Listener(*wlr.TextInputV3).init(handleDestroy),
 
 pub fn create(wlr_text_input: *wlr.TextInputV3) !void {
-    const seat: *Seat = @ptrCast(@alignCast(wlr_text_input.seat.data));
+    const seat: *Seat = @ptrFromInt(wlr_text_input.seat.data);
 
     const text_input = try util.gpa.create(TextInput);
 
@@ -64,7 +64,7 @@ pub fn create(wlr_text_input: *wlr.TextInputV3) !void {
 
 fn handleEnable(listener: *wl.Listener(*wlr.TextInputV3), _: *wlr.TextInputV3) void {
     const text_input: *TextInput = @fieldParentPtr("enable", listener);
-    const seat: *Seat = @ptrCast(@alignCast(text_input.wlr_text_input.seat.data));
+    const seat: *Seat = @ptrFromInt(text_input.wlr_text_input.seat.data);
 
     if (text_input.wlr_text_input.focused_surface == null) {
         log.err("client requested to enable text input without focus, ignoring request", .{});
@@ -91,7 +91,7 @@ fn handleEnable(listener: *wl.Listener(*wlr.TextInputV3), _: *wlr.TextInputV3) v
 
 fn handleCommit(listener: *wl.Listener(*wlr.TextInputV3), _: *wlr.TextInputV3) void {
     const text_input: *TextInput = @fieldParentPtr("commit", listener);
-    const seat: *Seat = @ptrCast(@alignCast(text_input.wlr_text_input.seat.data));
+    const seat: *Seat = @ptrFromInt(text_input.wlr_text_input.seat.data);
 
     if (seat.relay.text_input != text_input) {
         log.err("inactive text input tried to commit an update, client bug?", .{});
@@ -105,7 +105,7 @@ fn handleCommit(listener: *wl.Listener(*wlr.TextInputV3), _: *wlr.TextInputV3) v
 
 fn handleDisable(listener: *wl.Listener(*wlr.TextInputV3), _: *wlr.TextInputV3) void {
     const text_input: *TextInput = @fieldParentPtr("disable", listener);
-    const seat: *Seat = @ptrCast(@alignCast(text_input.wlr_text_input.seat.data));
+    const seat: *Seat = @ptrFromInt(text_input.wlr_text_input.seat.data);
 
     if (seat.relay.text_input == text_input) {
         seat.relay.disableTextInput();
@@ -114,7 +114,7 @@ fn handleDisable(listener: *wl.Listener(*wlr.TextInputV3), _: *wlr.TextInputV3)
 
 fn handleDestroy(listener: *wl.Listener(*wlr.TextInputV3), _: *wlr.TextInputV3) void {
     const text_input: *TextInput = @fieldParentPtr("destroy", listener);
-    const seat: *Seat = @ptrCast(@alignCast(text_input.wlr_text_input.seat.data));
+    const seat: *Seat = @ptrFromInt(text_input.wlr_text_input.seat.data);
 
     if (seat.relay.text_input == text_input) {
         seat.relay.disableTextInput();

river/View.zig

@@ -181,8 +181,6 @@ post_fullscreen_box: wlr.Box = undefined,
 
 foreign_toplevel_handle: ForeignToplevelHandle = .{},
 
-ext_foreign_toplevel_handle: ?*wlr.ExtForeignToplevelHandleV1 = null,
-
 /// Connector name of the output this view occupied before an evacuation.
 output_before_evac: ?[]const u8 = null,
 
@@ -277,12 +275,11 @@ pub fn resizeUpdatePosition(view: *View, width: i32, height: i32) void {
     assert(view.inflight.resizing);
 
     const data = blk: {
-        var it = server.input_manager.seats.iterator(.forward);
-        while (it.next()) |seat| {
-            if (seat.cursor.inflight_mode == .resize and
-                seat.cursor.inflight_mode.resize.view == view)
-            {
-                break :blk seat.cursor.inflight_mode.resize;
+        var it = server.input_manager.seats.first;
+        while (it) |node| : (it = node.next) {
+            const cursor = &node.data.cursor;
+            if (cursor.inflight_mode == .resize and cursor.inflight_mode.resize.view == view) {
+                break :blk cursor.inflight_mode.resize;
             }
         } else {
             // The view resizing state should never be set when the view is
@@ -449,11 +446,7 @@ pub fn updateSceneState(view: *View) void {
         for (&view.borders, &border_boxes) |border, *border_box| {
             border_box.x += box.x;
             border_box.y += box.y;
-            if (!border_box.intersection(border_box, &output_box)) {
-                // TODO(wlroots): remove this redundant code after fixed upstream
-                // https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/5084
-                border_box.* = .{ .x = 0, .y = 0, .width = 0, .height = 0 };
-            }
+            _ = border_box.intersection(border_box, &output_box);
             border_box.x -= box.x;
             border_box.y -= box.y;
 
@@ -489,7 +482,8 @@ pub fn rootSurface(view: View) ?*wlr.Surface {
 pub fn sendFrameDone(view: View) void {
     assert(view.mapped and !view.destroying);
 
-    const now = posix.clock_gettime(.MONOTONIC) catch @panic("CLOCK_MONOTONIC not supported");
+    var now: posix.timespec = undefined;
+    posix.clock_gettime(posix.CLOCK.MONOTONIC, &now) catch @panic("CLOCK_MONOTONIC not supported");
     view.rootSurface().?.sendFrameDone(&now);
 }
 
@@ -595,7 +589,7 @@ pub fn allowTearing(view: *View) bool {
         .window_hint => {
             if (server.config.allow_tearing) {
                 if (view.rootSurface()) |root_surface| {
-                    return server.tearing_control_manager.hintFromSurface(root_surface) == .async;
+                    return server.tearing_control_manager.hintFromSurface(root_surface) == .@"async";
                 }
             }
             return false;
@@ -659,15 +653,6 @@ pub fn map(view: *View) !void {
     assert(!view.mapped and !view.destroying);
     view.mapped = true;
 
-    if (wlr.ExtForeignToplevelHandleV1.create(server.foreign_toplevel_list, &.{
-        .title = view.getTitle(),
-        .app_id = view.getAppId(),
-    })) |handle| {
-        view.ext_foreign_toplevel_handle = handle;
-    } else |_| {
-        log.err("failed to create ext foreign toplevel handle", .{});
-    }
-
     view.foreign_toplevel_handle.map();
 
     if (server.config.rules.float.match(view)) |float| {
@@ -721,8 +706,8 @@ pub fn map(view: *View) !void {
     if (output) |o| {
         view.setPendingOutput(o);
 
-        var it = server.input_manager.seats.iterator(.forward);
-        while (it.next()) |seat| seat.focus(view);
+        var it = server.input_manager.seats.first;
+        while (it) |seat_node| : (it = seat_node.next) seat_node.data.focus(view);
     } else {
         log.debug("no output available for newly mapped view, adding to fallback stacks", .{});
 
@@ -767,10 +752,6 @@ pub fn unmap(view: *View) void {
     assert(view.mapped and !view.destroying);
     view.mapped = false;
 
-    if (view.ext_foreign_toplevel_handle) |handle| {
-        handle.destroy();
-        view.ext_foreign_toplevel_handle = null;
-    }
     view.foreign_toplevel_handle.unmap();
 
     server.root.applyPending();
@@ -781,19 +762,12 @@ pub fn notifyState(view: *const View) void {
         if (view.getTitle()) |title| wlr_handle.setTitle(title);
     }
     // Send title and tags to all status listeners attached to a seat which focuses this view
-    if (view.ext_foreign_toplevel_handle) |handle| {
-        handle.updateState(&.{
-            .title = view.getTitle(),
-            .app_id = view.getAppId(),
-        });
-    }
-    // Send title to all status listeners attached to a seat which focuses this view
-    var seat_it = server.input_manager.seats.iterator(.forward);
-    while (seat_it.next()) |seat| {
-        if (seat.focused == .view and seat.focused.view == view) {
-            var it = seat.status_trackers.iterator(.forward);
-            while (it.next()) |tracker| {
-                tracker.sendFocusedView();
+    var seat_it = server.input_manager.seats.first;
+    while (seat_it) |seat_node| : (seat_it = seat_node.next) {
+        if (seat_node.data.focused == .view and seat_node.data.focused.view == view) {
+            var client_it = seat_node.data.status_trackers.first;
+            while (client_it) |client_node| : (client_it = client_node.next) {
+                client_node.data.sendFocusedView();
             }
         }
     }
@@ -803,11 +777,4 @@ pub fn notifyAppId(view: View) void {
     if (view.foreign_toplevel_handle.wlr_handle) |wlr_handle| {
         if (view.getAppId()) |app_id| wlr_handle.setAppId(app_id);
     }
-
-    if (view.ext_foreign_toplevel_handle) |handle| {
-        handle.updateState(&.{
-            .title = view.getTitle(),
-            .app_id = view.getAppId(),
-        });
-    }
 }

river/XdgDecoration.zig

@@ -34,7 +34,7 @@ request_mode: wl.Listener(*wlr.XdgToplevelDecorationV1) =
     wl.Listener(*wlr.XdgToplevelDecorationV1).init(handleRequestMode),
 
 pub fn init(wlr_decoration: *wlr.XdgToplevelDecorationV1) void {
-    const toplevel: *XdgToplevel = @ptrCast(@alignCast(wlr_decoration.toplevel.base.data));
+    const toplevel: *XdgToplevel = @ptrFromInt(wlr_decoration.toplevel.base.data);
 
     toplevel.decoration = .{ .wlr_decoration = wlr_decoration };
     const decoration = &toplevel.decoration.?;
@@ -48,7 +48,7 @@ pub fn init(wlr_decoration: *wlr.XdgToplevelDecorationV1) void {
 }
 
 pub fn deinit(decoration: *XdgDecoration) void {
-    const toplevel: *XdgToplevel = @ptrCast(@alignCast(decoration.wlr_decoration.toplevel.base.data));
+    const toplevel: *XdgToplevel = @ptrFromInt(decoration.wlr_decoration.toplevel.base.data);
 
     decoration.destroy.link.remove();
     decoration.request_mode.link.remove();
@@ -72,7 +72,7 @@ fn handleRequestMode(
 ) void {
     const decoration: *XdgDecoration = @fieldParentPtr("request_mode", listener);
 
-    const toplevel: *XdgToplevel = @ptrCast(@alignCast(decoration.wlr_decoration.toplevel.base.data));
+    const toplevel: *XdgToplevel = @ptrFromInt(decoration.wlr_decoration.toplevel.base.data);
     const view = toplevel.view;
 
     const ssd = server.config.rules.ssd.match(toplevel.view) orelse

river/XdgToplevel.zig

@@ -100,8 +100,8 @@ pub fn create(wlr_toplevel: *wlr.XdgToplevel) error{OutOfMemory}!void {
 
     toplevel.view = view;
 
-    wlr_toplevel.base.data = toplevel;
-    wlr_toplevel.base.surface.data = &view.tree.node;
+    wlr_toplevel.base.data = @intFromPtr(toplevel);
+    wlr_toplevel.base.surface.data = @intFromPtr(&view.tree.node);
 
     // Add listeners that are active over the toplevel's entire lifetime
     wlr_toplevel.events.destroy.add(&toplevel.destroy);
@@ -216,7 +216,7 @@ fn handleDestroy(listener: *wl.Listener(void)) void {
     toplevel.new_popup.link.remove();
 
     // The wlr_surface may outlive the wlr_xdg_toplevel so we must clean up the user data.
-    toplevel.wlr_toplevel.base.surface.data = null;
+    toplevel.wlr_toplevel.base.surface.data = 0;
 
     const view = toplevel.view;
     view.impl = .none;
@@ -235,7 +235,7 @@ fn handleMap(listener: *wl.Listener(void)) void {
     toplevel.wlr_toplevel.events.set_title.add(&toplevel.set_title);
     toplevel.wlr_toplevel.events.set_app_id.add(&toplevel.set_app_id);
 
-    toplevel.geometry = toplevel.wlr_toplevel.base.geometry;
+    toplevel.wlr_toplevel.base.getGeometry(&toplevel.geometry);
 
     view.pending.box = .{
         .x = 0,
@@ -338,7 +338,7 @@ fn handleCommit(listener: *wl.Listener(*wlr.Surface), _: *wlr.Surface) void {
     switch (toplevel.configure_state) {
         .idle, .committed, .timed_out => {
             const old_geometry = toplevel.geometry;
-            toplevel.geometry = toplevel.wlr_toplevel.base.geometry;
+            toplevel.wlr_toplevel.base.getGeometry(&toplevel.geometry);
 
             const size_changed = toplevel.geometry.width != old_geometry.width or
                 toplevel.geometry.height != old_geometry.height;
@@ -381,7 +381,7 @@ fn handleCommit(listener: *wl.Listener(*wlr.Surface), _: *wlr.Surface) void {
         // stashed buffer from when the transaction started.
         .inflight => view.sendFrameDone(),
         .acked, .timed_out_acked => {
-            toplevel.geometry = toplevel.wlr_toplevel.base.geometry;
+            toplevel.wlr_toplevel.base.getGeometry(&toplevel.geometry);
 
             if (view.inflight.resizing) {
                 view.resizeUpdatePosition(toplevel.geometry.width, toplevel.geometry.height);
@@ -423,7 +423,7 @@ fn handleRequestMove(
     event: *wlr.XdgToplevel.event.Move,
 ) void {
     const toplevel: *XdgToplevel = @fieldParentPtr("request_move", listener);
-    const seat: *Seat = @ptrCast(@alignCast(event.seat.seat.data));
+    const seat: *Seat = @ptrFromInt(event.seat.seat.data);
     const view = toplevel.view;
 
     if (view.pending.fullscreen) return;
@@ -446,7 +446,7 @@ fn handleRequestMove(
 
 fn handleRequestResize(listener: *wl.Listener(*wlr.XdgToplevel.event.Resize), event: *wlr.XdgToplevel.event.Resize) void {
     const toplevel: *XdgToplevel = @fieldParentPtr("request_resize", listener);
-    const seat: *Seat = @ptrCast(@alignCast(event.seat.seat.data));
+    const seat: *Seat = @ptrFromInt(event.seat.seat.data);
     const view = toplevel.view;
 
     if (view.pending.fullscreen) return;

river/XwaylandOverrideRedirect.zig

@@ -120,7 +120,7 @@ fn mapImpl(override_redirect: *XwaylandOverrideRedirect) error{OutOfMemory}!void
         .override_redirect = override_redirect,
     });
 
-    surface.data = &override_redirect.surface_tree.?.node;
+    surface.data = @intFromPtr(&override_redirect.surface_tree.?.node);
 
     override_redirect.surface_tree.?.node.setPosition(
         override_redirect.xwayland_surface.x,
@@ -159,14 +159,15 @@ fn handleUnmap(listener: *wl.Listener(void)) void {
 
     override_redirect.set_geometry.link.remove();
 
-    override_redirect.xwayland_surface.surface.?.data = null;
+    override_redirect.xwayland_surface.surface.?.data = 0;
     override_redirect.surface_tree.?.node.destroy();
     override_redirect.surface_tree = null;
 
     // If the unmapped surface is currently focused, pass keyboard focus
     // to the most appropriate surface.
-    var seat_it = server.input_manager.seats.iterator(.forward);
-    while (seat_it.next()) |seat| {
+    var seat_it = server.input_manager.seats.first;
+    while (seat_it) |seat_node| : (seat_it = seat_node.next) {
+        const seat = &seat_node.data;
         if (seat.focused == .view and seat.focused.view.impl == .xwayland_view and
             seat.focused.view.impl.xwayland_view.xwayland_surface.pid == override_redirect.xwayland_surface.pid and
             seat.wlr_seat.keyboard_state.focused_surface == override_redirect.xwayland_surface.surface)

river/XwaylandView.zig

@@ -164,7 +164,7 @@ pub fn handleMap(listener: *wl.Listener(void)) void {
 
     const xwayland_surface = xwayland_view.xwayland_surface;
     const surface = xwayland_surface.surface.?;
-    surface.data = &view.tree.node;
+    surface.data = @intFromPtr(&view.tree.node);
 
     // Add listeners that are only active while mapped
     xwayland_surface.events.set_title.add(&xwayland_view.set_title);
@@ -215,12 +215,11 @@ pub fn handleMap(listener: *wl.Listener(void)) void {
 fn handleUnmap(listener: *wl.Listener(void)) void {
     const xwayland_view: *XwaylandView = @fieldParentPtr("unmap", listener);
 
-    xwayland_view.xwayland_surface.surface.?.data = null;
+    xwayland_view.xwayland_surface.surface.?.data = 0;
 
     // Remove listeners that are only active while mapped
     xwayland_view.set_title.link.remove();
     xwayland_view.set_class.link.remove();
-    xwayland_view.set_decorations.link.remove();
     xwayland_view.request_fullscreen.link.remove();
     xwayland_view.request_minimize.link.remove();
 

river/c.zig

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-pub const c = @cImport({
+pub usingnamespace @cImport({
     @cDefine("_POSIX_C_SOURCE", "200809L");
 
     @cInclude("stdlib.h");

river/command.zig

@@ -122,7 +122,6 @@ pub const Error = error{
     CannotParseFile,
     UnknownOption,
     ConflictingOptions,
-    WriteFailed,
     OutOfMemory,
     Other,
 };
@@ -166,7 +165,7 @@ pub fn errToMsg(err: Error) [:0]const u8 {
         Error.InvalidValue => "invalid value",
         Error.CannotReadFile => "cannot read file",
         Error.CannotParseFile => "cannot parse file",
-        Error.WriteFailed, Error.OutOfMemory => "out of memory",
+        Error.OutOfMemory => "out of memory",
         Error.Other => unreachable,
     };
 }

river/command/cursor.zig

@@ -35,8 +35,9 @@ pub fn cursor(
         if (args.len < 3) return Error.NotEnoughArguments;
         if (args.len > 3) return Error.TooManyArguments;
         server.config.cursor_hide_timeout = try std.fmt.parseInt(u31, args[2], 10);
-        var seat_it = server.input_manager.seats.iterator(.forward);
-        while (seat_it.next()) |seat| {
+        var seat_it = server.input_manager.seats.first;
+        while (seat_it) |seat_node| : (seat_it = seat_node.next) {
+            const seat = &seat_node.data;
             seat.cursor.unhide();
         }
     } else if (std.mem.eql(u8, "when-typing", args[1])) {

river/command/input.zig

@@ -34,8 +34,8 @@ pub fn listInputs(
 ) Error!void {
     if (args.len > 1) return error.TooManyArguments;
 
-    var aw: std.Io.Writer.Allocating = .init(util.gpa);
-
+    var input_list = std.ArrayList(u8).init(util.gpa);
+    const writer = input_list.writer();
     var prev = false;
 
     var it = server.input_manager.devices.iterator(.forward);
@@ -46,16 +46,16 @@ pub fn listInputs(
             }
         } else false;
 
-        if (prev) try aw.writer.writeByte('\n');
+        if (prev) try input_list.appendSlice("\n");
         prev = true;
 
-        try aw.writer.print("{s}\n\tconfigured: {}\n", .{
+        try writer.print("{s}\n\tconfigured: {}\n", .{
             device.identifier,
             configured,
         });
     }
 
-    out.* = try aw.toOwnedSlice();
+    out.* = try input_list.toOwnedSlice();
 }
 
 pub fn listInputConfigs(
@@ -65,14 +65,15 @@ pub fn listInputConfigs(
 ) Error!void {
     if (args.len > 1) return error.TooManyArguments;
 
-    var aw: std.Io.Writer.Allocating = .init(util.gpa);
+    var input_list = std.ArrayList(u8).init(util.gpa);
+    const writer = input_list.writer();
 
     for (server.input_manager.configs.items, 0..) |*input_config, i| {
-        if (i > 0) try aw.writer.writeByte('\n');
-        try input_config.write(&aw.writer);
+        if (i > 0) try writer.writeByte('\n');
+        try input_config.write(writer);
     }
 
-    out.* = try aw.toOwnedSlice();
+    out.* = try input_list.toOwnedSlice();
 }
 
 pub fn input(
@@ -98,7 +99,7 @@ pub fn input(
         };
         errdefer util.gpa.free(input_config.glob);
 
-        try server.input_manager.configs.ensureUnusedCapacity(util.gpa, 1);
+        try server.input_manager.configs.ensureUnusedCapacity(1);
 
         try input_config.parse(args[2], args[3]);
 

river/command/layout.zig

@@ -71,8 +71,9 @@ pub fn sendLayoutCmd(
     const output = seat.focused_output orelse return;
     const target_namespace = args[1];
 
-    var it = output.layouts.iterator(.forward);
-    const layout = while (it.next()) |layout| {
+    var it = output.layouts.first;
+    const layout = while (it) |node| : (it = node.next) {
+        const layout = &node.data;
         if (mem.eql(u8, layout.namespace, target_namespace)) break layout;
     } else return;
 

river/command/map.zig

@@ -22,7 +22,7 @@ const wlr = @import("wlroots");
 const xkb = @import("xkbcommon");
 const flags = @import("flags");
 
-const c = @import("../c.zig").c;
+const c = @import("../c.zig");
 const server = &@import("../main.zig").server;
 const util = @import("../util.zig");
 
@@ -285,7 +285,7 @@ fn parseKeysym(name: [:0]const u8, out: *?[]const u8) !xkb.Keysym {
 }
 
 fn parseModifiers(modifiers_str: []const u8, out: *?[]const u8) !wlr.Keyboard.ModifierMask {
-    var it = mem.splitScalar(u8, modifiers_str, '+');
+    var it = mem.split(u8, modifiers_str, "+");
     var modifiers = wlr.Keyboard.ModifierMask{};
     outer: while (it.next()) |mod_name| {
         if (mem.eql(u8, mod_name, "None")) continue;

river/command/output.zig

@@ -109,7 +109,7 @@ fn getOutput(seat: *Seat, str: []const u8) !?*Output {
                 .previous => link.prev.?,
             };
         }
-        return @fieldParentPtr("active_link", link);
+        return @as(*Output, @fieldParentPtr("active_link", link));
     } else if (std.meta.stringToEnum(wlr.OutputLayout.Direction, str)) |direction| { // Spacial direction
         var focus_box: wlr.Box = undefined;
         server.root.output_layout.getBox(seat.focused_output.?.wlr_output, &focus_box);
@@ -121,7 +121,7 @@ fn getOutput(seat: *Seat, str: []const u8) !?*Output {
             @floatFromInt(focus_box.x + @divTrunc(focus_box.width, 2)),
             @floatFromInt(focus_box.y + @divTrunc(focus_box.height, 2)),
         ) orelse return null;
-        return @ptrCast(@alignCast(wlr_output.data));
+        return @as(*Output, @ptrFromInt(wlr_output.data));
     } else {
         // Check if an output matches by name
         var it = server.root.active_outputs.iterator(.forward);

river/command/rule.zig

@@ -15,7 +15,6 @@
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
 const std = @import("std");
-const assert = std.debug.assert;
 const fmt = std.fmt;
 
 const globber = @import("globber");
@@ -28,7 +27,6 @@ const Error = @import("../command.zig").Error;
 const Seat = @import("../Seat.zig");
 const View = @import("../View.zig");
 const Anchor = @import("../Config.zig").Anchor;
-const RuleGlobs = @import("../rule_list.zig").RuleGlobs;
 
 const Action = enum {
     float,
@@ -189,7 +187,7 @@ pub fn ruleDel(_: *Seat, args: []const [:0]const u8, _: *?[]const u8) Error!void
 
     const action = std.meta.stringToEnum(Action, result.args[0]) orelse return Error.UnknownOption;
 
-    const rule: RuleGlobs = .{
+    const rule = .{
         .app_id_glob = result.flags.@"app-id" orelse "*",
         .title_glob = result.flags.title orelse "*",
     };
@@ -251,12 +249,6 @@ fn apply_tearing_rules() void {
     }
 }
 
-fn alignLeft(buf: []const u8, width: usize, writer: *std.io.Writer) Error!void {
-    assert(buf.len <= width);
-    try writer.writeAll(buf);
-    try writer.splatByteAll(' ', width - buf.len);
-}
-
 pub fn listRules(_: *Seat, args: []const [:0]const u8, out: *?[]const u8) Error!void {
     if (args.len < 2) return error.NotEnoughArguments;
     if (args.len > 2) return error.TooManyArguments;
@@ -278,12 +270,11 @@ pub fn listRules(_: *Seat, args: []const [:0]const u8, out: *?[]const u8) Error!
     const app_id_column_max = 2 + @max("app-id".len, max_glob_len.app_id);
     const title_column_max = 2 + @max("title".len, max_glob_len.title);
 
-    var buffer = std.io.Writer.Allocating.init(util.gpa);
-    defer buffer.deinit();
-    const writer = &buffer.writer;
+    var buffer = std.ArrayList(u8).init(util.gpa);
+    const writer = buffer.writer();
 
-    try alignLeft("title", title_column_max, writer);
-    try alignLeft("app-id", app_id_column_max, writer);
+    try fmt.formatBuf("title", .{ .width = title_column_max, .alignment = .left }, writer);
+    try fmt.formatBuf("app-id", .{ .width = app_id_column_max, .alignment = .left }, writer);
     try writer.writeAll("action\n");
 
     switch (rule_list) {
@@ -298,8 +289,8 @@ pub fn listRules(_: *Seat, args: []const [:0]const u8, out: *?[]const u8) Error!
                 else => unreachable,
             };
             for (rules) |rule| {
-                try alignLeft(rule.title_glob, title_column_max, writer);
-                try alignLeft(rule.app_id_glob, app_id_column_max, writer);
+                try fmt.formatBuf(rule.title_glob, .{ .width = title_column_max, .alignment = .left }, writer);
+                try fmt.formatBuf(rule.app_id_glob, .{ .width = app_id_column_max, .alignment = .left }, writer);
                 try writer.print("{s}\n", .{switch (list) {
                     .float => if (rule.value) "float" else "no-float",
                     .ssd => if (rule.value) "ssd" else "csd",
@@ -313,22 +304,22 @@ pub fn listRules(_: *Seat, args: []const [:0]const u8, out: *?[]const u8) Error!
         },
         .tags => {
             for (server.config.rules.tags.rules.items) |rule| {
-                try alignLeft(rule.title_glob, title_column_max, writer);
-                try alignLeft(rule.app_id_glob, app_id_column_max, writer);
+                try fmt.formatBuf(rule.title_glob, .{ .width = title_column_max, .alignment = .left }, writer);
+                try fmt.formatBuf(rule.app_id_glob, .{ .width = app_id_column_max, .alignment = .left }, writer);
                 try writer.print("{b}\n", .{rule.value});
             }
         },
         .position => {
             for (server.config.rules.position.rules.items) |rule| {
-                try alignLeft(rule.title_glob, title_column_max, writer);
-                try alignLeft(rule.app_id_glob, app_id_column_max, writer);
-                try writer.print("{s},{d},{d}\n", .{ @tagName(rule.value.anchor), rule.value.x, rule.value.y });
+                try fmt.formatBuf(rule.title_glob, .{ .width = title_column_max, .alignment = .left }, writer);
+                try fmt.formatBuf(rule.app_id_glob, .{ .width = app_id_column_max, .alignment = .left }, writer);
+                try writer.print("{s},{d},{d}", .{ @tagName(rule.value.anchor), rule.value.x, rule.value.y });
             }
         },
         .dimensions => {
             for (server.config.rules.dimensions.rules.items) |rule| {
-                try alignLeft(rule.title_glob, title_column_max, writer);
-                try alignLeft(rule.app_id_glob, app_id_column_max, writer);
+                try fmt.formatBuf(rule.title_glob, .{ .width = title_column_max, .alignment = .left }, writer);
+                try fmt.formatBuf(rule.app_id_glob, .{ .width = app_id_column_max, .alignment = .left }, writer);
                 try writer.print("{d}x{d}\n", .{ rule.value.width, rule.value.height });
             }
         },

river/command/spawn.zig

@@ -17,7 +17,7 @@
 const std = @import("std");
 const posix = std.posix;
 
-const c = @import("../c.zig").c;
+const c = @import("../c.zig");
 const util = @import("../util.zig");
 const process = @import("../process.zig");
 

river/main.zig

@@ -18,13 +18,14 @@ const build_options = @import("build_options");
 const std = @import("std");
 const mem = std.mem;
 const fs = std.fs;
+const io = std.io;
 const log = std.log;
 const posix = std.posix;
 const builtin = @import("builtin");
 const wlr = @import("wlroots");
 const flags = @import("flags");
 
-const c = @import("c.zig").c;
+const c = @import("c.zig");
 const util = @import("util.zig");
 const process = @import("process.zig");
 
@@ -51,21 +52,21 @@ pub fn main() anyerror!void {
         .{ .name = "log-level", .kind = .arg },
         .{ .name = "no-xwayland", .kind = .boolean },
     }).parse(std.os.argv[1..]) catch {
-        try fs.File.stderr().writeAll(usage);
+        try io.getStdErr().writeAll(usage);
         posix.exit(1);
     };
     if (result.flags.h) {
-        try fs.File.stdout().writeAll(usage);
+        try io.getStdOut().writeAll(usage);
         posix.exit(0);
     }
     if (result.args.len != 0) {
         log.err("unknown option '{s}'", .{result.args[0]});
-        try fs.File.stderr().writeAll(usage);
+        try io.getStdErr().writeAll(usage);
         posix.exit(1);
     }
 
     if (result.flags.version) {
-        try fs.File.stdout().writeAll(build_options.version ++ "\n");
+        try io.getStdOut().writeAll(build_options.version ++ "\n");
         posix.exit(0);
     }
     if (result.flags.@"log-level") |level| {
@@ -79,7 +80,7 @@ pub fn main() anyerror!void {
             runtime_log_level = .debug;
         } else {
             log.err("invalid log level '{s}'", .{level});
-            try fs.File.stderr().writeAll(usage);
+            try io.getStdErr().writeAll(usage);
             posix.exit(1);
         }
     }
@@ -188,8 +189,8 @@ pub fn logFn(
 
     const scope_prefix = if (scope == .default) ": " else "(" ++ @tagName(scope) ++ "): ";
 
-    var stderr = fs.File.stderr().writer(&.{});
-    stderr.interface.print(level.asText() ++ scope_prefix ++ format ++ "\n", args) catch {};
+    const stderr = io.getStdErr().writer();
+    stderr.print(level.asText() ++ scope_prefix ++ format ++ "\n", args) catch {};
 }
 
 /// See wlroots_log_wrapper.c

river/process.zig

@@ -17,7 +17,7 @@
 const std = @import("std");
 const posix = std.posix;
 
-const c = @import("c.zig").c;
+const c = @import("c.zig");
 
 var original_rlimit: ?posix.rlimit = null;
 
@@ -26,10 +26,10 @@ pub fn setup() void {
     // has had its read end closed by another process.
     const sig_ign = posix.Sigaction{
         .handler = .{ .handler = posix.SIG.IGN },
-        .mask = posix.sigemptyset(),
+        .mask = posix.empty_sigset,
         .flags = 0,
     };
-    posix.sigaction(posix.SIG.PIPE, &sig_ign, null);
+    posix.sigaction(posix.SIG.PIPE, &sig_ign, null) catch unreachable;
 
     // Most unix systems have a default limit of 1024 file descriptors and it
     // seems unlikely for this default to be universally raised due to the
@@ -61,14 +61,14 @@ pub fn setup() void {
 
 pub fn cleanupChild() void {
     if (c.setsid() < 0) unreachable;
-    if (posix.system.sigprocmask(posix.SIG.SETMASK, &posix.sigemptyset(), null) < 0) unreachable;
+    if (posix.system.sigprocmask(posix.SIG.SETMASK, &posix.empty_sigset, null) < 0) unreachable;
 
     const sig_dfl = posix.Sigaction{
         .handler = .{ .handler = posix.SIG.DFL },
-        .mask = posix.sigemptyset(),
+        .mask = posix.empty_sigset,
         .flags = 0,
     };
-    posix.sigaction(posix.SIG.PIPE, &sig_dfl, null);
+    posix.sigaction(posix.SIG.PIPE, &sig_dfl, null) catch unreachable;
 
     if (original_rlimit) |original| {
         posix.setrlimit(.NOFILE, original) catch {

river/rule_list.zig

@@ -23,11 +23,6 @@ const util = @import("util.zig");
 
 const View = @import("View.zig");
 
-pub const RuleGlobs = struct {
-    app_id_glob: []const u8,
-    title_glob: []const u8,
-};
-
 pub const MaxGlobLen = struct {
     app_id: usize,
     title: usize,
@@ -88,7 +83,7 @@ pub fn RuleList(comptime T: type) type {
             });
         }
 
-        pub fn del(list: *List, rule: RuleGlobs) ?T {
+        pub fn del(list: *List, rule: struct { app_id_glob: []const u8, title_glob: []const u8 }) ?T {
             for (list.rules.items, 0..) |existing, i| {
                 if (mem.eql(u8, rule.app_id_glob, existing.app_id_glob) and
                     mem.eql(u8, rule.title_glob, existing.title_glob))

riverctl/main.zig

@@ -16,7 +16,7 @@
 
 const std = @import("std");
 const mem = std.mem;
-const fs = std.fs;
+const io = std.io;
 const posix = std.posix;
 const assert = std.debug.assert;
 const builtin = @import("builtin");
@@ -73,15 +73,15 @@ fn _main() !void {
         .{ .name = "h", .kind = .boolean },
         .{ .name = "version", .kind = .boolean },
     }).parse(std.os.argv[1..]) catch {
-        try fs.File.stderr().writeAll(usage);
+        try io.getStdErr().writeAll(usage);
         posix.exit(1);
     };
     if (result.flags.h) {
-        try fs.File.stdout().writeAll(usage);
+        try io.getStdOut().writeAll(usage);
         posix.exit(0);
     }
     if (result.flags.version) {
-        try fs.File.stdout().writeAll(@import("build_options").version ++ "\n");
+        try io.getStdOut().writeAll(@import("build_options").version ++ "\n");
         posix.exit(0);
     }
 
@@ -125,8 +125,8 @@ fn callbackListener(_: *zriver.CommandCallbackV1, event: zriver.CommandCallbackV
     switch (event) {
         .success => |success| {
             if (mem.len(success.output) > 0) {
-                var stdout = fs.File.stdout().writer(&.{});
-                stdout.interface.print("{s}\n", .{success.output}) catch @panic("failed to write to stdout");
+                const stdout = io.getStdOut().writer();
+                stdout.print("{s}\n", .{success.output}) catch @panic("failed to write to stdout");
             }
             posix.exit(0);
         },
@@ -134,7 +134,7 @@ fn callbackListener(_: *zriver.CommandCallbackV1, event: zriver.CommandCallbackV
             // A small hack to provide usage text when river reports an unknown command.
             if (mem.orderZ(u8, failure.failure_message, "unknown command") == .eq) {
                 std.log.err("unknown command", .{});
-                fs.File.stderr().writeAll(usage) catch {};
+                io.getStdErr().writeAll(usage) catch {};
                 posix.exit(1);
             }
             fatal("{s}", .{failure.failure_message});

rivertile/main.zig

@@ -91,12 +91,15 @@ const gpa = std.heap.c_allocator;
 const Context = struct {
     initialized: bool = false,
     layout_manager: ?*river.LayoutManagerV3 = null,
-    outputs: wl.list.Head(Output, .link),
+    outputs: std.TailQueue(Output) = .{},
 
     fn addOutput(context: *Context, registry: *wl.Registry, name: u32) !void {
         const wl_output = try registry.bind(name, wl.Output, 3);
         errdefer wl_output.release();
-        try Output.create(context, wl_output, name);
+        const node = try gpa.create(std.TailQueue(Output).Node);
+        errdefer gpa.destroy(node);
+        try node.data.init(context, wl_output, name);
+        context.outputs.append(node);
     }
 };
 
@@ -110,21 +113,15 @@ const Output = struct {
 
     layout: *river.LayoutV3 = undefined,
 
-    link: wl.list.Link,
-
-    fn create(context: *Context, wl_output: *wl.Output, name: u32) !void {
-        const output = try gpa.create(Output);
-        errdefer gpa.destroy(output);
+    fn init(output: *Output, context: *Context, wl_output: *wl.Output, name: u32) !void {
         output.* = .{
             .wl_output = wl_output,
             .name = name,
             .main_location = default_main_location,
             .main_count = default_main_count,
             .main_ratio = default_main_ratio,
-            .link = undefined,
         };
         if (context.initialized) try output.getLayout(context);
-        context.outputs.append(output);
     }
 
     fn getLayout(output: *Output, context: *Context) !void {
@@ -133,11 +130,9 @@ const Output = struct {
         output.layout.setListener(*Output, layoutListener, output);
     }
 
-    fn destroy(output: *Output) void {
+    fn deinit(output: *Output) void {
         output.wl_output.release();
         output.layout.destroy();
-        output.link.remove();
-        gpa.destroy(output);
     }
 
     fn layoutListener(layout: *river.LayoutV3, event: river.LayoutV3.Event, output: *Output) void {
@@ -145,7 +140,7 @@ const Output = struct {
             .namespace_in_use => fatal("namespace 'rivertile' already in use.", .{}),
 
             .user_command => |ev| {
-                var it = mem.tokenizeScalar(u8, mem.span(ev.command), ' ');
+                var it = mem.tokenize(u8, mem.span(ev.command), " ");
                 const raw_cmd = it.next() orelse {
                     std.log.err("not enough arguments", .{});
                     return;
@@ -317,17 +312,17 @@ pub fn main() !void {
         .{ .name = "main-count", .kind = .arg },
         .{ .name = "main-ratio", .kind = .arg },
     }).parse(std.os.argv[1..]) catch {
-        try std.fs.File.stderr().writeAll(usage);
+        try std.io.getStdErr().writeAll(usage);
         posix.exit(1);
     };
     if (result.flags.h) {
-        try std.fs.File.stdout().writeAll(usage);
+        try std.io.getStdOut().writeAll(usage);
         posix.exit(0);
     }
     if (result.args.len != 0) fatalPrintUsage("unknown option '{s}'", .{result.args[0]});
 
     if (result.flags.version) {
-        try std.fs.File.stdout().writeAll(@import("build_options").version ++ "\n");
+        try std.io.getStdOut().writeAll(@import("build_options").version ++ "\n");
         posix.exit(0);
     }
     if (result.flags.@"view-padding") |raw| {
@@ -361,10 +356,7 @@ pub fn main() !void {
     };
     defer display.disconnect();
 
-    var context: Context = .{
-        .outputs = undefined,
-    };
-    context.outputs.init();
+    var context: Context = .{};
 
     const registry = try display.getRegistry();
     registry.setListener(*Context, registryListener, &context);
@@ -376,8 +368,9 @@ pub fn main() !void {
 
     context.initialized = true;
 
-    var it = context.outputs.iterator(.forward);
-    while (it.next()) |output| {
+    var it = context.outputs.first;
+    while (it) |node| : (it = node.next) {
+        const output = &node.data;
         try output.getLayout(&context);
     }
 
@@ -396,10 +389,13 @@ fn registryListener(registry: *wl.Registry, event: wl.Registry.Event, context: *
             }
         },
         .global_remove => |ev| {
-            var it = context.outputs.safeIterator(.forward);
-            while (it.next()) |output| {
+            var it = context.outputs.first;
+            while (it) |node| : (it = node.next) {
+                const output = &node.data;
                 if (output.name == ev.name) {
-                    output.destroy();
+                    context.outputs.remove(node);
+                    output.deinit();
+                    gpa.destroy(node);
                     break;
                 }
             }
@@ -414,7 +410,7 @@ fn fatal(comptime format: []const u8, args: anytype) noreturn {
 
 fn fatalPrintUsage(comptime format: []const u8, args: anytype) noreturn {
     std.log.err(format, args);
-    std.fs.File.stderr().writeAll(usage) catch {};
+    std.io.getStdErr().writeAll(usage) catch {};
     posix.exit(1);
 }