com32/lib/onexit.c

   1 /*
   2  * onexit.c
   3  */
   4
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7 #include "atexit.h"
   8
   9 static struct atexit *__atexit_list;
  10
  11 static __noreturn on_exit_exit(int rv)
  12 {
  13     struct atexit *ap;
  14
  15     for (ap = __atexit_list; ap; ap = ap->next) {
  16         ap->fctn(rv, ap->arg);  /* This assumes extra args are harmless */
  17     }
  18
  19     _exit(rv);
  20 }
  21
  22 int on_exit(void (*fctn) (int, void *), void *arg)
  23 {
  24     struct atexit *as = malloc(sizeof(struct atexit));
  25
  26     if (!as)
  27         return -1;
  28
  29     as->fctn = fctn;
  30     as->arg = arg;
  31
  32     as->next = __atexit_list;
  33     __atexit_list = as;
  34
  35     return 0;
  36 }