reactos/lib/sdk/crt/startup/atonexit.c

   1 /**
   2  * This file has no copyright assigned and is placed in the Public Domain.
   3  * This file is part of the w64 mingw-runtime package.
   4  * No warranty is given; refer to the file DISCLAIMER.PD within this package.
   5  */
   6
   7 #undef CRTDLL
   8 #ifndef _DLL
   9 #define _DLL
  10 #endif
  11
  12 #include <oscalls.h>
  13 #include <internal.h>
  14 #include <stdlib.h>
  15 #include <crtdefs.h>
  16 #include <limits.h>
  17 #include <windows.h>
  18
  19 #define _EXIT_LOCK1 8
  20
  21   void __cdecl _lock (int _File);
  22   void __cdecl _unlock (int _File);
  23
  24 _PVFV *__onexitbegin;
  25 _PVFV *__onexitend;
  26
  27 extern _CRTIMP _onexit_t __dllonexit (_onexit_t, _PVFV**, _PVFV**);
  28 extern _onexit_t (__cdecl * __MINGW_IMP_SYMBOL(_onexit)) (_onexit_t func);
  29
  30 /* Choose a different name to prevent name conflicts. The CRT one works fine.  */
  31 _onexit_t __cdecl mingw_onexit(_onexit_t func);
  32
  33 _onexit_t __cdecl mingw_onexit(_onexit_t func)
  34 {
  35   _PVFV *onexitbegin;
  36   _PVFV *onexitend;
  37   _onexit_t retval;
  38
  39   onexitbegin = (_PVFV *) _decode_pointer (__onexitbegin);
  40
  41   if (onexitbegin == (_PVFV *) -1)
  42     return (* __MINGW_IMP_SYMBOL(_onexit)) (func);
  43   _lock (_EXIT_LOCK1);
  44   onexitbegin = (_PVFV *) _decode_pointer (__onexitbegin);
  45   onexitend = (_PVFV *) _decode_pointer (__onexitend);
  46
  47   retval = __dllonexit (func, &onexitbegin, &onexitend);
  48
  49   __onexitbegin = (_PVFV *) _encode_pointer (onexitbegin);
  50   __onexitend = (_PVFV *) _encode_pointer (onexitend);
  51   _unlock (_EXIT_LOCK1);
  52   return retval;
  53 }
  54
  55 int __cdecl
  56 atexit (_PVFV func)
  57 {
  58   return (mingw_onexit((_onexit_t)func) == NULL) ? -1 : 0;
  59 }