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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_ | 5 #ifndef BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_ |
6 #define BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_ | 6 #define BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_ |
7 | 7 |
8 #include "base/memory/discardable_memory.h" | 8 #include "base/memory/discardable_memory.h" |
9 | 9 |
10 #include "base/mac/scoped_mach_vm.h" | 10 #include "base/mac/scoped_mach_vm.h" |
11 #include "base/memory/discardable_memory_manager.h" | 11 #include "base/memory/discardable_memory_manager.h" |
12 | 12 |
13 namespace base { | 13 namespace base { |
14 namespace internal { | 14 namespace internal { |
15 | 15 |
16 class DiscardableMemoryMach | 16 class DiscardableMemoryMach |
17 : public DiscardableMemory, | 17 : public DiscardableMemory, |
18 public internal::DiscardableMemoryManagerAllocation { | 18 public internal::DiscardableMemoryManagerAllocation { |
19 public: | 19 public: |
20 explicit DiscardableMemoryMach(size_t bytes); | 20 explicit DiscardableMemoryMach(size_t bytes); |
21 virtual ~DiscardableMemoryMach(); | 21 ~DiscardableMemoryMach() override; |
22 | 22 |
23 static void PurgeForTesting(); | 23 static void PurgeForTesting(); |
24 | 24 |
25 bool Initialize(); | 25 bool Initialize(); |
26 | 26 |
27 // Overridden from DiscardableMemory: | 27 // Overridden from DiscardableMemory: |
28 virtual DiscardableMemoryLockStatus Lock() override; | 28 DiscardableMemoryLockStatus Lock() override; |
29 virtual void Unlock() override; | 29 void Unlock() override; |
30 virtual void* Memory() const override; | 30 void* Memory() const override; |
31 | 31 |
32 // Overridden from internal::DiscardableMemoryManagerAllocation: | 32 // Overridden from internal::DiscardableMemoryManagerAllocation: |
33 virtual bool AllocateAndAcquireLock() override; | 33 bool AllocateAndAcquireLock() override; |
34 virtual void ReleaseLock() override; | 34 void ReleaseLock() override; |
35 virtual void Purge() override; | 35 void Purge() override; |
36 | 36 |
37 private: | 37 private: |
38 mac::ScopedMachVM memory_; | 38 mac::ScopedMachVM memory_; |
39 const size_t bytes_; | 39 const size_t bytes_; |
40 bool is_locked_; | 40 bool is_locked_; |
41 | 41 |
42 DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryMach); | 42 DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryMach); |
43 }; | 43 }; |
44 | 44 |
45 } // namespace internal | 45 } // namespace internal |
46 } // namespace base | 46 } // namespace base |
47 | 47 |
48 #endif // BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_ | 48 #endif // BASE_MEMORY_DISCARDABLE_MEMORY_MACH_H_ |
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