1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_
6 #define BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_
8 #include "base/memory/discardable_memory.h"
10 #include "base/mac/scoped_mach_vm.h"
11 #include "base/memory/discardable_memory_manager.h"
16 class DiscardableMemoryMach
17 : public DiscardableMemory,
18 public internal::DiscardableMemoryManagerAllocation {
20 explicit DiscardableMemoryMach(size_t bytes);
21 ~DiscardableMemoryMach() override;
23 static void PurgeForTesting();
27 // Overridden from DiscardableMemory:
28 DiscardableMemoryLockStatus Lock() override;
29 void Unlock() override;
30 void* Memory() const override;
32 // Overridden from internal::DiscardableMemoryManagerAllocation:
33 bool AllocateAndAcquireLock() override;
34 void ReleaseLock() override;
35 void Purge() override;
36 bool IsMemoryResident() const override;
39 mac::ScopedMachVM memory_;
43 DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryMach);
46 } // namespace internal
49 #endif // BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_