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 #endif
  13
  14 BOOL WINAPI
  15 DllMain(HINSTANCE hInstance, DWORD Reason, LPVOID Reserved)
  16 {
  17 #ifdef OPENGL32_USE_TLS
  18     struct Opengl32_ThreadData* ThreadData;
  19 #endif
  20     switch ( Reason )
  21     {
  22         case DLL_PROCESS_ATTACH:
  23 #ifdef OPENGL32_USE_TLS
  24             OglTlsIndex = TlsAlloc();
  25             if(OglTlsIndex == TLS_OUT_OF_INDEXES)
  26                 return FALSE;
  27 #endif
  28             /* Initialize Context list */
  29             InitializeListHead(&ContextListHead);
  30             /* no break */
  31         case DLL_THREAD_ATTACH:
  32 #ifdef OPENGL32_USE_TLS
  33             ThreadData = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ThreadData));
  34             if(!ThreadData)
  35                 return FALSE;
  36             TlsSetValue(OglTlsIndex, ThreadData);
  37             ThreadData->glDispatchTable = &StubTable.glDispatchTable;
  38             ThreadData->hglrc = NULL;
  39             ThreadData->hdc = NULL;
  40             ThreadData->dc_data = NULL;
  41 #else
  42             NtCurrentTeb()->glTable = &StubTable.glDispatchTable;
  43 #endif // defined(OPENGL32_USE_TLS)
  44             break;
  45
  46         case DLL_THREAD_DETACH:
  47             /* Set NULL context for this thread */
  48             wglMakeCurrent(NULL, NULL);
  49             /* Clean up */
  50 #ifdef OPENGL32_USE_TLS
  51             ThreadData = TlsGetValue(OglTlsIndex);
  52             if(ThreadData)
  53                 HeapFree(GetProcessHeap(), 0, ThreadData);
  54 #else
  55             NtCurrentTeb()->glTable = NULL;
  56 #endif // defined(OPENGL32_USE_TLS)
  57         break;
  58         case DLL_PROCESS_DETACH:
  59             /* Clean up */
  60             if (!Reserved)
  61             {
  62                 /* The process is not shutting down: release everything */
  63                 wglMakeCurrent(NULL, NULL);
  64                 IntDeleteAllContexts();
  65                 IntDeleteAllICDs();
  66 #ifdef OPENGL32_USE_TLS
  67                 ThreadData = TlsGetValue(OglTlsIndex);
  68                 if(ThreadData)
  69                     HeapFree(GetProcessHeap(), 0, ThreadData);
  70 #endif
  71             }
  72 #ifdef OPENGL32_USE_TLS
  73             TlsFree(OglTlsIndex);
  74 #endif
  75             break;
  76     }
  77
  78     return TRUE;
  79 }