gpu: Add GpuFence framework.

gpu/ipc/service/gpu_command_buffer_stub.cc

Index: gpu/ipc/service/gpu_command_buffer_stub.cc
diff --git a/gpu/ipc/service/gpu_command_buffer_stub.cc b/gpu/ipc/service/gpu_command_buffer_stub.cc
index 5b29e2ca28ca161e22bece542ffb544293f6908e..999a6cf81738f59e1af8d01ee9d3daa153fb682c 100644
--- a/gpu/ipc/service/gpu_command_buffer_stub.cc
+++ b/gpu/ipc/service/gpu_command_buffer_stub.cc
@@ -20,6 +20,7 @@
 #include "gpu/command_buffer/common/gpu_memory_buffer_support.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "gpu/command_buffer/common/sync_token.h"
+#include "gpu/command_buffer/service/fence_manager.h"
 #include "gpu/command_buffer/service/gl_context_virtual.h"
 #include "gpu/command_buffer/service/gl_state_restorer_impl.h"
 #include "gpu/command_buffer/service/image_manager.h"
@@ -41,6 +42,7 @@
 #include "gpu/ipc/service/image_transport_surface.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
+#include "ui/gl/gl_fence.h"
 #include "ui/gl/gl_image.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_switches.h"
@@ -256,6 +258,8 @@ bool GpuCommandBufferStub::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyImage, OnDestroyImage);
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_CreateStreamTexture,
                         OnCreateStreamTexture)
+    IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_CreateFence, OnCreateFence);
+    IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyFence, OnDestroyFence);
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -1079,6 +1083,47 @@ void GpuCommandBufferStub::OnDestroyImage(int32_t id) {
   image_manager->RemoveImage(id);
 }
 
+void GpuCommandBufferStub::OnCreateFence(
+    const GpuCommandBufferMsg_CreateFence_Params& params) {
+  TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnCreateFence");
+  const int32_t id = params.id;
+  const gfx::GpuFenceHandle& handle = params.gpu_fence;
+
+  if (!decoder_)
+    return;
+
+  gles2::FenceManager* fence_manager = decoder_->GetFenceManager();
+  DCHECK(fence_manager);
+  if (fence_manager->LookupFence(id)) {
+    LOG(ERROR) << "Fence already exists with same ID.";
+    return;
+  }
+
+  std::unique_ptr<gl::GLFence> fence =
+      channel()->CreateFenceForGpuFence(handle);
+  if (!fence) {
+    DLOG(ERROR) << "Failed to create GLFence from GpuFence handle.";
+    return;
+  }
+
+  fence_manager->AddFence(std::move(fence), id);
+}
+
+void GpuCommandBufferStub::OnDestroyFence(int32_t id) {
+  TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyFence");
+
+  if (!decoder_)
+    return;
+
+  gles2::FenceManager* fence_manager = decoder_->GetFenceManager();
+  DCHECK(fence_manager);
+  if (!fence_manager->LookupFence(id)) {
+    LOG(ERROR) << "Fence with ID doesn't exist.";
+    return;
+  }
+  fence_manager->RemoveFence(id);
+}
+
 void GpuCommandBufferStub::SendConsoleMessage(int32_t id,
                                               const std::string& message) {
   GPUCommandBufferConsoleMessage console_message;