src/exit/at_quick_exit.c

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