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src/gc.h

@@ -0,0 +1,23 @@
+#ifndef INCLUDED_GC_H
+#define INCLUDED_GC_H
+
+#include <stddef.h>
+
+typedef struct GCEntry {
+    void *obj;
+    struct GCEntry *prev;
+    struct GCEntry *next;
+} GCEntry;
+
+typedef struct {
+    unsigned int immortal : 1;
+    unsigned int mark : 1;
+    GCEntry *entry;
+} ObjectGCInfo;
+
+// the argument is a LispVal *
+void lisp_gc_register_object(void *obj);
+
+size_t lisp_gc_now(void);
+
+#endif