cosmopolitan/libc/runtime/gc.h

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#ifndef COSMOPOLITAN_LIBC_RUNTIME_GC_H_
#define COSMOPOLITAN_LIBC_RUNTIME_GC_H_
#include "libc/calls/calls.h"
#include "libc/nexgen32e/stackframe.h"
#include "libc/runtime/runtime.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
void *_gc(void *) hidden;
void *_defer(void *, void *) hidden;
void __defer(struct StackFrame *, void *, void *) hidden;
void __deferer(struct StackFrame *, void *, void *) hidden;
void _gclongjmp(jmp_buf, int) dontthrow wontreturn;
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
#define _gc(THING) _defer((void *)_weakfree, (void *)(THING))
#define _defer(FN, ARG) \
({ \
autotype(ARG) Arg = (ARG); \
/* prevent weird opts like tail call */ \
asm volatile("" : "+g"(Arg) : : "memory"); \
__defer((struct StackFrame *)__builtin_frame_address(0), FN, Arg); \
asm volatile("" : "+g"(Arg) : : "memory"); \
Arg; \
})
#endif /* defined(__GNUC__) && !defined(__STRICT_ANSI__) */
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_RUNTIME_GC_H_ */