reactos/lib/3rdparty/mingw/crtdll.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 within this package.
   5  */
   6
   7 #ifdef CRTDLL
   8 #undef CRTDLL
   9 #ifndef _DLL
  10 #define _DLL
  11 #endif
  12
  13 #include <oscalls.h>
  14 #include <internal.h>
  15 #include <stdlib.h>
  16 #include <windows.h>
  17 #define _DECL_DLLMAIN
  18 #include <process.h>
  19 #include <crtdbg.h>
  20
  21 #ifndef _CRTIMP
  22 #ifdef CRTDLL
  23 #define _CRTIMP __declspec(dllexport)
  24 #else
  25 #ifdef _DLL
  26 #define _CRTIMP __declspec(dllimport)
  27 #else
  28 #define _CRTIMP
  29 #endif
  30 #endif
  31 #endif
  32 #include <sect_attribs.h>
  33 #include <locale.h>
  34
  35 extern void __cdecl _initterm(_PVFV *,_PVFV *);
  36 extern void __main ();
  37 extern void _pei386_runtime_relocator (void);
  38 extern _CRTALLOC(".CRT$XIA") _PIFV __xi_a[];
  39 extern _CRTALLOC(".CRT$XIZ") _PIFV __xi_z[];
  40 extern _CRTALLOC(".CRT$XCA") _PVFV __xc_a[];
  41 extern _CRTALLOC(".CRT$XCZ") _PVFV __xc_z[];
  42
  43 extern const PIMAGE_TLS_CALLBACK __dyn_tls_init_callback;
  44
  45 static int __proc_attached = 0;
  46
  47 extern _PVFV *__onexitbegin;
  48 extern _PVFV *__onexitend;
  49
  50 extern int mingw_app_type;
  51
  52 extern BOOL WINAPI DllMain (HANDLE hDllHandle, DWORD dwReason, LPVOID lpreserved);
  53
  54 extern BOOL WINAPI DllEntryPoint (HANDLE, DWORD, LPVOID);
  55
  56 static int pre_c_init (void);
  57
  58 _CRTALLOC(".CRT$XIAA") _PIFV pcinit = pre_c_init;
  59
  60 static int
  61 pre_c_init (void)
  62 {
  63   _PVFV *onexitbegin;
  64
  65   onexitbegin = (_PVFV *) malloc (32 * sizeof (_PVFV));
  66   __onexitend = __onexitbegin = (_PVFV *) _encode_pointer (onexitbegin);
  67
  68   if (onexitbegin == NULL)
  69     return 1;
  70   *onexitbegin = (_PVFV) NULL;
  71   return 0;
  72 }
  73
  74 BOOL WINAPI _CRT_INIT (HANDLE hDllHandle, DWORD dwReason, LPVOID lpreserved)
  75 {
  76   if (dwReason == DLL_PROCESS_DETACH)
  77     {
  78       if (__proc_attached > 0)
  79         __proc_attached--;
  80       else
  81         return FALSE;
  82     }
  83   if (dwReason == DLL_PROCESS_ATTACH)
  84     {
  85       void *lock_free = NULL;
  86       void *fiberid = ((PNT_TIB)NtCurrentTeb ())->StackBase;
  87       int nested = FALSE;
  88
  89       while ((lock_free = InterlockedCompareExchangePointer ((volatile PVOID *) &__native_startup_lock,
  90                                                              fiberid, 0)) != 0)
  91         {
  92           if (lock_free == fiberid)
  93             {
  94               nested = TRUE;
  95               break;
  96             }
  97           Sleep(1000);
  98         }
  99       if (__native_startup_state != __uninitialized)
 100         {
 101           _amsg_exit(31);
 102         }
 103       else
 104         {
 105           __native_startup_state = __initializing;
 106
 107           _initterm ((_PVFV *) (void *) __xi_a, (_PVFV *) (void *) __xi_z);
 108           _initterm (__xc_a,__xc_z);
 109           __native_startup_state = __initialized;
 110         }
 111       if (! nested)
 112         {
 113           InterlockedExchangePointer ((volatile PVOID *) &__native_startup_lock, 0);
 114         }
 115       if (__dyn_tls_init_callback != NULL &&
 116           _IsNonwritableInCurrentImage ((PBYTE) &__dyn_tls_init_callback))
 117         {
 118           __dyn_tls_init_callback (hDllHandle, DLL_THREAD_ATTACH, lpreserved);
 119         }
 120       __proc_attached++;
 121     }
 122   else if (dwReason == DLL_PROCESS_DETACH)
 123     {
 124       void *lock_free = NULL;
 125       while ((lock_free = InterlockedCompareExchangePointer ((volatile PVOID *) &__native_startup_lock,(PVOID) 1, 0)) != 0)
 126         {
 127           Sleep(1000);
 128         }
 129       if(__native_startup_state!=__initialized)
 130         {
 131           _amsg_exit (31);
 132         }
 133       else
 134         {
 135           _PVFV * onexitbegin = (_PVFV *) _decode_pointer (__onexitbegin);
 136           if (onexitbegin)
 137             {
 138               _PVFV *onexitend = (_PVFV *) _decode_pointer (__onexitend);
 139               while (--onexitend >= onexitbegin)
 140                 if (*onexitend != NULL)
 141                   (**onexitend) ();
 142               free (onexitbegin);
 143               __onexitbegin = __onexitend = (_PVFV *) NULL;
 144             }
 145           __native_startup_state = __uninitialized;
 146           InterlockedExchangePointer ((volatile PVOID *) &__native_startup_lock, 0);
 147         }
 148     }
 149   return TRUE;
 150 }
 151
 152 static BOOL __DllMainCRTStartup (HANDLE, DWORD, LPVOID);
 153
 154 BOOL WINAPI
 155 DllMainCRTStartup(HANDLE hDllHandle,DWORD dwReason,LPVOID lpreserved)
 156 {
 157   mingw_app_type = 0;
 158   if (dwReason == DLL_PROCESS_ATTACH)
 159     {
 160       __security_init_cookie ();
 161     }
 162   return __DllMainCRTStartup (hDllHandle, dwReason, lpreserved);
 163 }
 164
 165 __declspec(noinline) BOOL
 166 __DllMainCRTStartup (HANDLE hDllHandle, DWORD dwReason, LPVOID lpreserved)
 167 {
 168   BOOL retcode = TRUE;
 169
 170   __native_dllmain_reason = dwReason;
 171   if (dwReason == DLL_PROCESS_DETACH && __proc_attached == 0)
 172     {
 173         retcode = FALSE;
 174         goto i__leave;
 175     }
 176   if (dwReason == DLL_PROCESS_ATTACH || dwReason == DLL_THREAD_ATTACH)
 177     {
 178         retcode = DllEntryPoint (hDllHandle, dwReason, lpreserved);
 179         if (retcode)
 180           retcode = _CRT_INIT (hDllHandle, dwReason, lpreserved);
 181         if (! retcode)
 182           goto i__leave;
 183     }
 184   _pei386_runtime_relocator ();
 185   if (retcode && dwReason == DLL_PROCESS_ATTACH)
 186     __main ();
 187   retcode = DllMain(hDllHandle,dwReason,lpreserved);
 188   if ((dwReason == DLL_PROCESS_ATTACH) && ! retcode)
 189     {
 190         DllMain (hDllHandle, DLL_PROCESS_DETACH, lpreserved);
 191         _CRT_INIT (hDllHandle, DLL_PROCESS_DETACH, lpreserved);
 192         DllEntryPoint (hDllHandle, DLL_PROCESS_DETACH, lpreserved);
 193     }
 194   if (dwReason == DLL_PROCESS_DETACH || dwReason == DLL_THREAD_DETACH)
 195     {
 196         if (_CRT_INIT (hDllHandle, dwReason, lpreserved) == FALSE)
 197           {
 198             retcode = FALSE;
 199           }
 200         if (retcode)
 201           {
 202             retcode = DllEntryPoint (hDllHandle, dwReason, lpreserved);
 203           }
 204     }
 205 i__leave:
 206   __native_dllmain_reason = UINT_MAX;
 207   return retcode ;
 208 }
 209 #endif