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// Copyright 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 BASE_MEMORY_DISCARDABLE_MEMORY_ASHMEM_H_
#define BASE_MEMORY_DISCARDABLE_MEMORY_ASHMEM_H_
#include "base/memory/discardable_memory.h"
#include "base/macros.h"
#include "base/memory/discardable_memory_manager.h"
namespace base {
namespace internal {
class DiscardableAshmemChunk;
class DiscardableMemoryAshmemAllocator;
class DiscardableMemoryManager;
class DiscardableMemoryAshmem
: public DiscardableMemory,
public internal::DiscardableMemoryManagerAllocation {
public:
explicit DiscardableMemoryAshmem(size_t bytes,
DiscardableMemoryAshmemAllocator* allocator,
DiscardableMemoryManager* manager);
virtual ~DiscardableMemoryAshmem();
bool Initialize();
// Overridden from DiscardableMemory:
virtual DiscardableMemoryLockStatus Lock() OVERRIDE;
virtual void Unlock() OVERRIDE;
virtual void* Memory() const OVERRIDE;
// Overridden from internal::DiscardableMemoryManagerAllocation:
virtual bool AllocateAndAcquireLock() OVERRIDE;
virtual void ReleaseLock() OVERRIDE;
virtual void Purge() OVERRIDE;
private:
const size_t bytes_;
DiscardableMemoryAshmemAllocator* const allocator_;
DiscardableMemoryManager* const manager_;
bool is_locked_;
scoped_ptr<DiscardableAshmemChunk> ashmem_chunk_;
DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryAshmem);
};
} // namespace internal
} // namespace base
#endif // BASE_MEMORY_DISCARDABLE_MEMORY_ASHMEM_H_
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