add c11 quick_exit and at_quick_exit functions
[musl] / src / exit / at_quick_exit.c
1 #include <stdlib.h>
2 #include "libc.h"
3
4 #define COUNT 32
5
6 static void (*funcs[COUNT])(void);
7 static int count;
8 static int lock[2];
9
10 void __funcs_on_quick_exit()
11 {
12         void (*func)(void);
13         LOCK(lock);
14         while (count > 0) {
15                 func = funcs[--count];
16                 UNLOCK(lock);
17                 func();
18                 LOCK(lock);
19         }
20 }
21
22 int at_quick_exit(void (*func)(void))
23 {
24         if (count == 32) return -1;
25         LOCK(lock);
26         funcs[count++] = func;
27         UNLOCK(lock);
28         return 0;
29 }