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// Copyright (c) 2014 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_COMMON_BUFFER_H_
#define GPU_COMMAND_BUFFER_COMMON_BUFFER_H_
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/shared_memory.h"
#include "gpu/command_buffer/common/types.h"
#include "gpu/gpu_export.h"
namespace base {
class SharedMemory;
}
namespace gpu {
// Buffer owns a piece of shared-memory of a certain size.
class GPU_EXPORT Buffer : public base::RefCountedThreadSafe<Buffer> {
public:
Buffer(scoped_ptr<base::SharedMemory> shared_memory, size_t size);
base::SharedMemory* shared_memory() const { return shared_memory_.get(); }
void* memory() const { return memory_; }
size_t size() const { return size_; }
// Returns NULL if the address overflows the memory.
void* GetDataAddress(uint32 data_offset, uint32 data_size) const;
private:
friend class base::RefCountedThreadSafe<Buffer>;
~Buffer();
scoped_ptr<base::SharedMemory> shared_memory_;
void* memory_;
size_t size_;
DISALLOW_COPY_AND_ASSIGN(Buffer);
};
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_COMMON_BUFFER_H_
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