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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_MACH_H_
#define BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_
#include "base/memory/discardable_memory.h"
#include "base/mac/scoped_mach_vm.h"
#include "base/memory/discardable_memory_manager.h"
namespace base {
namespace internal {
class DiscardableMemoryMach
: public DiscardableMemory,
public internal::DiscardableMemoryManagerAllocation {
public:
explicit DiscardableMemoryMach(size_t bytes);
~DiscardableMemoryMach() override;
static void PurgeForTesting();
bool Initialize();
// Overridden from DiscardableMemory:
DiscardableMemoryLockStatus Lock() override;
void Unlock() override;
void* Memory() const override;
// Overridden from internal::DiscardableMemoryManagerAllocation:
bool AllocateAndAcquireLock() override;
void ReleaseLock() override;
void Purge() override;
bool IsMemoryResident() const override;
private:
mac::ScopedMachVM memory_;
const size_t bytes_;
bool is_locked_;
DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryMach);
};
} // namespace internal
} // namespace base
#endif // BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_
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