newlib/libc/stdlib/cxa_atexit.c

   1 /*
   2  * Implementation of __cxa_atexit.
   3  */
   4
   5 #include <stddef.h>
   6 #include <stdlib.h>
   7 #include <reent.h>
   8 #include <sys/lock.h>
   9 #include "atexit.h"
  10
  11 #ifdef _REENT_SMALL
  12
  13 #include "on_exit_args.h"
  14
  15 /* force linking of static instance of _on_exit_args */
  16 const void * const __cxa_atexit_dummy = &__on_exit_args;
  17
  18 #endif  /* def _REENT_SMALL */
  19
  20 /*
  21  * Register a function to be performed at exit or DSO unload.
  22  */
  23
  24 int
  25 __cxa_atexit (void (*fn) (void *),
  26         void *arg,
  27         void *d)
  28 {
  29 #ifdef _LITE_EXIT
  30   /* Refer to comments in __atexit.c for more details of lite exit.  */
  31   int __register_exitproc (int, void (*fn) (void), void *, void *)
  32     __attribute__ ((weak));
  33
  34   if (!__register_exitproc)
  35     return 0;
  36   else
  37 #endif
  38     return __register_exitproc (__et_cxa, (void (*)(void)) fn, arg, d);
  39 }