1#include <stdlib.h>
 2#include "libc.h"
 3#include "lock.h"
 4#include "fork_impl.h"
 5
 6#define COUNT 32
 7
 8static void (*funcs[COUNT])(void);
 9static int count;
10#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
11static volatile int lock[1];
12volatile int *const __at_quick_exit_lockptr = lock;
13#endif
14
15void __funcs_on_quick_exit()
16{
17	void (*func)(void);
18	LOCK(lock);
19	while (count > 0) {
20		func = funcs[--count];
21		UNLOCK(lock);
22		func();
23		LOCK(lock);
24	}
25}
26
27int at_quick_exit(void (*func)(void))
28{
29	int r = 0;
30	LOCK(lock);
31	if (count == 32) r = -1;
32	else funcs[count++] = func;
33	UNLOCK(lock);
34	return r;
35}