gpu: Reuse transfer buffers more aggresively

gpu/command_buffer/service/command_buffer_service.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_COMMAND_BUFFER_SERVICE_H_
 #define GPU_COMMAND_BUFFER_SERVICE_COMMAND_BUFFER_SERVICE_H_
 
 #include "base/callback.h"
 #include "base/memory/shared_memory.h"
+#include "base/synchronization/lock.h"

[piman, 2014/02/07 22:58:20]

You don't need this, or the other changes in this file any more.

[jadahl, 2014/02/08 09:18:25]

Oops. Left them here unintentionally.

 #include "gpu/command_buffer/common/command_buffer.h"
 #include "gpu/command_buffer/common/command_buffer_shared.h"
 
 namespace gpu {
 
 class TransferBufferManagerInterface;
 
 // An object that implements a shared memory command buffer and a synchronous
 // API to manage the put and get pointers.
 class GPU_EXPORT CommandBufferService : public CommandBuffer {
@@ skipping 40 matching lines @@
   void UpdateState();
 
   // Register an existing shared memory object and get an ID that can be used
   // to identify it in the command buffer. Callee dups the handle until
   // DestroyTransferBuffer is called.
   bool RegisterTransferBuffer(int32 id,
                               base::SharedMemory* shared_memory,
                               size_t size);
 
  private:
+  State GetStateImpl();
+
   int32 ring_buffer_id_;
   Buffer ring_buffer_;
   scoped_ptr<base::SharedMemory> shared_state_shm_;
   CommandBufferSharedState* shared_state_;
   int32 num_entries_;
   int32 get_offset_;
   int32 put_offset_;
   base::Closure put_offset_change_callback_;
   GetBufferChangedCallback get_buffer_change_callback_;
   base::Closure parse_error_callback_;
   TransferBufferManagerInterface* transfer_buffer_manager_;
   int32 token_;
+  uint32 async_token_;
   uint32 generation_;
   error::Error error_;
   error::ContextLostReason context_lost_reason_;
+  base::Lock lock_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferService);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_COMMAND_BUFFER_SERVICE_H_