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         /* The DLL is loading due to process
  23          * initialization or a call to LoadLibrary.
  24          */
  25         case DLL_PROCESS_ATTACH:
  26 #ifdef OPENGL32_USE_TLS
  27             OglTlsIndex = TlsAlloc();
  28             if(OglTlsIndex == TLS_OUT_OF_INDEXES)
  29                 return FALSE;
  30 #endif
  31         /* Fall through */
  32         case DLL_THREAD_ATTACH:
  33 #ifdef OPENGL32_USE_TLS
  34             ThreadData = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ThreadData));
  35             if(!ThreadData)
  36                 return FALSE;
  37             TlsSetValue(OglTlsIndex, ThreadData);
  38             ThreadData->glDispatchTable = &StubTable.glDispatchTable;
  39             ThreadData->hglrc = NULL;
  40             ThreadData->hdc = NULL;
  41             ThreadData->dc_data = NULL;
  42 #else
  43             NtCurrentTeb()->glTable = &StubTable.glDispatchTable;
  44 #endif // defined(OPENGL32_USE_TLS)
  45             break;
  46
  47         case DLL_THREAD_DETACH:
  48             /* Clean up */
  49 #ifdef OPENGL32_USE_TLS
  50             ThreadData = TlsGetValue(OglTlsIndex);
  51             if(ThreadData)
  52                 HeapFree(GetProcessHeap(), 0, ThreadData);
  53 #else
  54             NtCurrentTeb->glTable = NULL;
  55 #endif // defined(OPENGL32_USE_TLS)
  56             break;
  57
  58         case DLL_PROCESS_DETACH:
  59             /* Clean up */
  60 #ifdef OPENGL32_USE_TLS
  61             ThreadData = TlsGetValue(OglTlsIndex);
  62             if(ThreadData)
  63                 HeapFree(GetProcessHeap(), 0, ThreadData);
  64             TlsFree(OglTlsIndex);
  65 #else
  66             NtCurrentTeb->glTable = NULL;
  67 #endif // defined(OPENGL32_USE_TLS)
  68             break;
  69     }
  70
  71     return TRUE;
  72 }