kc3-lang/angle/src/libEGL/main.cpp

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• Author : Geoff Lang
  Date : 2014-05-30 11:50:07
  Hash : 44fa7594
  Message : Refactor platform related functionality into platform.h and tls.h. Since libGLESv2 and libEGL will eventually be cross platform, it will be useful to have platform defines and TLS functions that work everywhere. BUG=angle:664 Change-Id: Ia357925a0992d82e8b446d88d32a1984d319e6e8 Reviewed-on: https://chromium-review.googlesource.com/202133 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• src/libEGL/main.cpp

• //
  // Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // main.cpp: DLL entry point and management of thread-local data.
  
  #include "libEGL/main.h"
  
  #include "common/debug.h"
  #include "common/tls.h"
  
  static TLSIndex currentTLS = TLS_OUT_OF_INDEXES;
  
  namespace egl
  {
  
  Current *AllocateCurrent()
  {
      ASSERT(currentTLS != TLS_OUT_OF_INDEXES);
      if (currentTLS == TLS_OUT_OF_INDEXES)
      {
          return NULL;
      }
  
      Current *current = new Current();
      current->error = EGL_SUCCESS;
      current->API = EGL_OPENGL_ES_API;
      current->display = EGL_NO_DISPLAY;
      current->drawSurface = EGL_NO_SURFACE;
      current->readSurface = EGL_NO_SURFACE;
  
      if (!SetTLSValue(currentTLS, current))
      {
          ERR("Could not set thread local storage.");
          return NULL;
      }
  
      return current;
  }
  
  void DeallocateCurrent()
  {
      Current *current = reinterpret_cast<Current*>(GetTLSValue(currentTLS));
      SafeDelete(current);
      SetTLSValue(currentTLS, NULL);
  }
  
  }
  
  extern "C" BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
  {
      switch (reason)
      {
        case DLL_PROCESS_ATTACH:
          {
  #if defined(ANGLE_ENABLE_TRACE)
              FILE *debug = fopen(TRACE_OUTPUT_FILE, "rt");
  
              if (debug)
              {
                  fclose(debug);
                  debug = fopen(TRACE_OUTPUT_FILE, "wt");   // Erase
                  
                  if (debug)
                  {
                      fclose(debug);
                  }
              }
  #endif
  
              currentTLS = CreateTLSIndex();
              if (currentTLS == TLS_OUT_OF_INDEXES)
              {
                  return FALSE;
              }
          }
          // Fall through to initialize index
        case DLL_THREAD_ATTACH:
          {
              egl::AllocateCurrent();
          }
          break;
        case DLL_THREAD_DETACH:
          {
              egl::DeallocateCurrent();
          }
          break;
        case DLL_PROCESS_DETACH:
          {
              egl::DeallocateCurrent();
              DestroyTLSIndex(currentTLS);
          }
          break;
        default:
          break;
      }
  
      return TRUE;
  }
  
  namespace egl
  {
  
  Current *GetCurrentData()
  {
      Current *current = reinterpret_cast<Current*>(GetTLSValue(currentTLS));
  
      // ANGLE issue 488: when the dll is loaded after thread initialization,
      // thread local storage (current) might not exist yet.
      return (current ? current : AllocateCurrent());
  }
  
  void setCurrentError(EGLint error)
  {
      Current *current = GetCurrentData();
  
      current->error = error;
  }
  
  EGLint getCurrentError()
  {
      Current *current = GetCurrentData();
  
      return current->error;
  }
  
  void setCurrentAPI(EGLenum API)
  {
      Current *current = GetCurrentData();
  
      current->API = API;
  }
  
  EGLenum getCurrentAPI()
  {
      Current *current = GetCurrentData();
  
      return current->API;
  }
  
  void setCurrentDisplay(EGLDisplay dpy)
  {
      Current *current = GetCurrentData();
  
      current->display = dpy;
  }
  
  EGLDisplay getCurrentDisplay()
  {
      Current *current = GetCurrentData();
  
      return current->display;
  }
  
  void setCurrentDrawSurface(EGLSurface surface)
  {
      Current *current = GetCurrentData();
  
      current->drawSurface = surface;
  }
  
  EGLSurface getCurrentDrawSurface()
  {
      Current *current = GetCurrentData();
  
      return current->drawSurface;
  }
  
  void setCurrentReadSurface(EGLSurface surface)
  {
      Current *current = GetCurrentData();
  
      current->readSurface = surface;
  }
  
  EGLSurface getCurrentReadSurface()
  {
      Current *current = GetCurrentData();
  
      return current->readSurface;
  }
  
  void error(EGLint errorCode)
  {
      egl::setCurrentError(errorCode);
  }
  
  }