Created an abstract rx::Fence class.

src/build_angle.gypi

@@ -262,6 +262,7 @@
             'libGLESv2/Renderbuffer.h',
             'libGLESv2/renderer/Blit.cpp',
             'libGLESv2/renderer/Blit.h',
+            'libGLESv2/renderer/FenceImpl.h',
             'libGLESv2/renderer/generatemip.h',
             'libGLESv2/renderer/Image.cpp',
             'libGLESv2/renderer/Image.h',

src/libGLESv2/libGLESv2.vcxproj

@@ -302,6 +302,7 @@ copy "$(OutDir)libGLESv2.lib" "$(ProjectDir)..\..\lib\$(Configuration)\"
     <ClInclude Include="..\common\RefCountObject.h" />
     <ClInclude Include="Renderbuffer.h" />
     <ClInclude Include="renderer\Blit.h" />
+    <ClInclude Include="renderer\FenceImpl.h" />
     <ClInclude Include="renderer\generatemip.h" />
     <ClInclude Include="renderer\Image.h" />
     <ClInclude Include="renderer\Image11.h" />

src/libGLESv2/libGLESv2.vcxproj.filters

@@ -412,6 +412,9 @@
     <ClInclude Include="renderer\Query9.h">
       <Filter>Renderer</Filter>
     </ClInclude>
+    <ClInclude Include="renderer\FenceImpl.h">
+      <Filter>Renderer</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="libGLESv2.def">

src/libGLESv2/renderer/FenceImpl.h

+//
+// Copyright (c) 2013 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.
+//
+
+// FenceImpl.h: Defines the rx::FenceImpl class.
+
+#ifndef LIBGLESV2_RENDERER_FENCEIMPL_H_
+#define LIBGLESV2_RENDERER_FENCEIMPL_H_
+
+#define GL_APICALL
+#include <GLES2/gl2.h>
+
+#include "common/angleutils.h"
+
+namespace rx
+{
+
+class FenceImpl
+{
+  public:
+    FenceImpl() : mStatus(GL_FALSE), mCondition(GL_NONE) { };
+    virtual ~FenceImpl() { };
+
+    virtual GLboolean isFence() = 0;
+    virtual void setFence(GLenum condition) = 0;
+    virtual GLboolean testFence() = 0;
+    virtual void finishFence() = 0;
+    virtual void getFenceiv(GLenum pname, GLint *params) = 0;
+
+  protected:
+    void setStatus(GLboolean status) { mStatus = status; }
+    GLboolean getStatus() const { return mStatus; }
+
+    void setCondition(GLuint condition) { mCondition = condition; }
+    GLuint getCondition() const { return mCondition; }
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(FenceImpl);
+
+    GLboolean mStatus;
+    GLenum mCondition;
+};
+
+}
+
+#endif // LIBGLESV2_RENDERER_FENCEIMPL_H_