gpu: Add GpuFence framework.

gpu/command_buffer/client/gles2_implementation.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 6267 matching lines @@
                      << "] glCreateGpuMemoryBufferImageCHROMIUM(" << width
                      << ", " << height << ", "
                      << GLES2Util::GetStringImageInternalFormat(internalformat)
                      << ", " << GLES2Util::GetStringImageUsage(usage) << ")");
   GLuint image_id = CreateGpuMemoryBufferImageCHROMIUMHelper(
       width, height, internalformat, usage);
   CheckGLError();
   return image_id;
 }
 
+GLuint GLES2Implementation::CreateFenceCHROMIUMHelper(ClientFence fence) {
+  int32_t fence_id = gpu_control_->CreateFence(fence);
+  if (fence_id < 0) {
+    SetGLError(GL_OUT_OF_MEMORY, "glCreateFenceCHROMIUM", "fence_id < 0");
+    return 0;
+  }
+  return fence_id;
+}
+
+GLuint GLES2Implementation::CreateFenceCHROMIUM(ClientFence fence) {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glCreateFenceCHROMIUM()");
+  GLuint fence_id = CreateFenceCHROMIUMHelper(fence);
+  CheckGLError();
+  return fence_id;
+}
+
+void GLES2Implementation::DestroyFenceCHROMIUMHelper(GLuint fence_id) {
+  // Flush the command stream to make sure all pending commands
+  // that may refer to the fence_id are executed on the service side.
+  helper_->CommandBufferHelper::Flush();
+  gpu_control_->DestroyFence(fence_id);
+}
+
+void GLES2Implementation::DestroyFenceCHROMIUM(GLuint fence_id) {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glDestroyFenceCHROMIUM("
+                     << fence_id << ")");
+  DestroyFenceCHROMIUMHelper(fence_id);
+  CheckGLError();
+}
+
 bool GLES2Implementation::ValidateSize(const char* func, GLsizeiptr size) {
   if (size < 0) {
     SetGLError(GL_INVALID_VALUE, func, "size < 0");
     return false;
   }
   if (!base::IsValueInRangeForNumericType<int32_t>(size)) {
     SetGLError(GL_INVALID_OPERATION, func, "size more than 32-bit");
     return false;
   }
   return true;
@@ skipping 732 matching lines @@
   cached_extensions_.clear();
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/client/gles2_implementation_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu