dll/opengl/opengl32/dllmain.c

   1 /*
   2  * COPYRIGHT:            See COPYING in the top level directory
   3  * PROJECT:              ReactOS
   4  * FILE:                 dll/opengl/opengl32/dllmain.c
   5  * PURPOSE:              OpenGL32 DLL
   6  */
   7
   8 #include "opengl32.h"
   9
  10 #ifdef OPENGL32_USE_TLS
  11 DWORD OglTlsIndex = 0xFFFFFFFF;
  12
  13 BOOL init_tls_data(void)
  14 {
  15     struct Opengl32_ThreadData* ThreadData;
  16
  17     ThreadData = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ThreadData));
  18     if(!ThreadData)
  19         return FALSE;
  20     TlsSetValue(OglTlsIndex, ThreadData);
  21     ThreadData->glDispatchTable = &StubTable.glDispatchTable;
  22     ThreadData->hglrc = NULL;
  23     ThreadData->hdc = NULL;
  24     ThreadData->dc_data = NULL;
  25     return TRUE;
  26 }
  27
  28 #endif
  29
  30 BOOL WINAPI
  31 DllMain(HINSTANCE hInstance, DWORD Reason, LPVOID Reserved)
  32 {
  33 #ifdef OPENGL32_USE_TLS
  34     struct Opengl32_ThreadData* ThreadData;
  35 #endif
  36     switch ( Reason )
  37     {
  38         case DLL_PROCESS_ATTACH:
  39 #ifdef OPENGL32_USE_TLS
  40             OglTlsIndex = TlsAlloc();
  41             if(OglTlsIndex == TLS_OUT_OF_INDEXES)
  42                 return FALSE;
  43 #endif
  44             /* Initialize Context list */
  45             InitializeListHead(&ContextListHead);
  46             /* no break */
  47         case DLL_THREAD_ATTACH:
  48 #ifdef OPENGL32_USE_TLS
  49             if (!init_tls_data())
  50                 return FALSE;
  51 #endif // defined(OPENGL32_USE_TLS)
  52             IntSetCurrentDispatchTable(&StubTable.glDispatchTable);
  53             break;
  54
  55         case DLL_THREAD_DETACH:
  56             /* Set NULL context for this thread */
  57             wglMakeCurrent(NULL, NULL);
  58             /* Clean up */
  59 #ifdef OPENGL32_USE_TLS
  60             ThreadData = TlsGetValue(OglTlsIndex);
  61             if(ThreadData)
  62                 HeapFree(GetProcessHeap(), 0, ThreadData);
  63 #else
  64             NtCurrentTeb()->glTable = NULL;
  65 #endif // defined(OPENGL32_USE_TLS)
  66         break;
  67         case DLL_PROCESS_DETACH:
  68             /* Clean up */
  69             if (!Reserved)
  70             {
  71                 /* The process is not shutting down: release everything */
  72                 wglMakeCurrent(NULL, NULL);
  73                 IntDeleteAllContexts();
  74                 IntDeleteAllICDs();
  75 #ifdef OPENGL32_USE_TLS
  76                 ThreadData = TlsGetValue(OglTlsIndex);
  77                 if(ThreadData)
  78                     HeapFree(GetProcessHeap(), 0, ThreadData);
  79 #endif
  80             }
  81 #ifdef OPENGL32_USE_TLS
  82             TlsFree(OglTlsIndex);
  83 #endif
  84             break;
  85     }
  86
  87     return TRUE;
  88 }