32 lines
1.3 KiB
Zig
32 lines
1.3 KiB
Zig
// This file is part of river, a dynamic tiling wayland compositor.
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//
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// Copyright 2020 Isaac Freund
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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const std = @import("std");
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/// The global general-purpose allocator used throughout river's code
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pub const gpa = std.heap.c_allocator;
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/// Take a pointer to c_void and cast it to a pointer to T. This function
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/// exists to avoid having the verbosity of the required alignment casts all
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/// over the code.
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pub fn voidCast(comptime T: type, ptr: var) *T {
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// See https://github.com/ziglang/zig/issues/5618
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if (@TypeOf(ptr) != *c_void)
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@compileError("voidCast takes *c_void but " ++ @typeName(@TypeOf(ptr)) ++ " was provided");
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return @ptrCast(*T, @alignCast(@alignOf(*T), ptr));
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}
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