kc3-lang/angle/src/libGLESv2/Fence.cpp

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• Author : apatrick@chromium.org
  Date : 2012-01-11 20:03:29
  Hash : f289ee8d
  Message : Allocate D3D queries from a pool for the Display. This is a workaround for an Intel bug. The crash looks like this: 0x5f816c53 [d3d9.dll + 0x00036c53] CQuery::~CQuery() 0x5f816bec [d3d9.dll + 0x00036bec] CQuery::`vector deleting destructor'(unsigned int) 0x5f7e8129 [d3d9.dll + 0x00008129] CBaseObject::~CBaseObject() 0x5f9e19c7 [libglesv2.dll + 0x000319c7] gl::Fence::`vector deleting destructor'(unsigned int) 0x5f9de78e [libglesv2.dll - context.cpp:975] gl::Context::deleteFence(unsigned int) 0x5f9e1491 [libglesv2.dll - context.cpp:198] gl::Context::~Context() 0x5f9e182f [libglesv2.dll - context.cpp:3936] glDestroyContext 0x717654ec [libegl.dll - display.cpp:749] egl::Display::destroyContext(gl::Context *) 0x7176a3da [libegl.dll - libegl.cpp:907] eglDestroyContext 0x64fbaf33 [chrome.dll - gl_context_egl.cc:75] gfx::GLContextEGL::Destroy() The vendor ID is always 8086 (Intel). Not an XP issue - it's happening on Win 7. With this change, D3D queries are only released when the display is destroyed or reset or if a very high number of D3D queries have been allocated. Tested by stepping exercising the NV_fence entry points in a debugger. Review URL: http://codereview.appspot.com/5534065 git-svn-id: https://angleproject.googlecode.com/svn/trunk@941 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/libGLESv2/Fence.cpp

• //
  // Copyright (c) 2002-2010 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.
  //
  
  // Fence.cpp: Implements the gl::Fence class, which supports the GL_NV_fence extension.
  
  #include "libGLESv2/Fence.h"
  
  #include "libGLESv2/main.h"
  
  namespace gl
  {
  
  Fence::Fence()
  { 
      mQuery = NULL;
      mCondition = GL_NONE;
      mStatus = GL_FALSE;
  }
  
  Fence::~Fence()
  {
      if (mQuery != NULL)
      {
          getDisplay()->freeEventQuery(mQuery);
      }
  }
  
  GLboolean Fence::isFence()
  {
      // GL_NV_fence spec:
      // A name returned by GenFencesNV, but not yet set via SetFenceNV, is not the name of an existing fence.
      return mQuery != NULL;
  }
  
  void Fence::setFence(GLenum condition)
  {
      if (!mQuery)
      {
          mQuery = getDisplay()->allocateEventQuery();
          if (!mQuery)
          {
              return error(GL_OUT_OF_MEMORY);
          }
      }
  
      HRESULT result = mQuery->Issue(D3DISSUE_END);
      ASSERT(SUCCEEDED(result));
  
      mCondition = condition;
      mStatus = GL_FALSE;
  }
  
  GLboolean Fence::testFence()
  {
      if (mQuery == NULL)
      {
          return error(GL_INVALID_OPERATION, GL_TRUE);
      }
  
      HRESULT result = mQuery->GetData(NULL, 0, D3DGETDATA_FLUSH);
  
      if (checkDeviceLost(result))
      {
         return error(GL_OUT_OF_MEMORY, GL_TRUE);
      }
  
      ASSERT(result == S_OK || result == S_FALSE);
      mStatus = result == S_OK;
      return mStatus;
  }
  
  void Fence::finishFence()
  {
      if (mQuery == NULL)
      {
          return error(GL_INVALID_OPERATION);
      }
  
      while (!testFence())
      {
          Sleep(0);
      }
  }
  
  void Fence::getFenceiv(GLenum pname, GLint *params)
  {
      if (mQuery == NULL)
      {
          return error(GL_INVALID_OPERATION);
      }
  
      switch (pname)
      {
          case GL_FENCE_STATUS_NV:
          {
              // GL_NV_fence spec:
              // Once the status of a fence has been finished (via FinishFenceNV) or tested and the returned status is TRUE (via either TestFenceNV
              // or GetFenceivNV querying the FENCE_STATUS_NV), the status remains TRUE until the next SetFenceNV of the fence.
              if (mStatus)
              {
                  params[0] = GL_TRUE;
                  return;
              }
              
              HRESULT result = mQuery->GetData(NULL, 0, 0);
              
              if (checkDeviceLost(result))
              {
                  params[0] = GL_TRUE;
                  return error(GL_OUT_OF_MEMORY);
              }
  
              ASSERT(result == S_OK || result == S_FALSE);
              mStatus = result == S_OK;
              params[0] = mStatus;
              
              break;
          }
          case GL_FENCE_CONDITION_NV:
              params[0] = mCondition;
              break;
          default:
              return error(GL_INVALID_ENUM);
              break;
      }
  }
  
  }