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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_SHMEM_H_ | 5 #ifndef BASE_MEMORY_DISCARDABLE_MEMORY_SHMEM_H_ |
6 #define BASE_MEMORY_DISCARDABLE_MEMORY_SHMEM_H_ | 6 #define BASE_MEMORY_DISCARDABLE_MEMORY_SHMEM_H_ |
7 | 7 |
8 #include "base/memory/discardable_memory.h" | 8 #include "base/memory/discardable_memory.h" |
9 | 9 |
10 #include "base/memory/discardable_memory_manager.h" | |
11 | |
12 namespace base { | 10 namespace base { |
13 class DiscardableMemoryShmemChunk; | 11 class DiscardableMemoryShmemChunk; |
14 | 12 |
15 namespace internal { | 13 namespace internal { |
16 | 14 |
17 class DiscardableMemoryShmem | 15 class DiscardableMemoryShmem : public DiscardableMemory { |
18 : public DiscardableMemory, | |
19 public internal::DiscardableMemoryManagerAllocation { | |
20 public: | 16 public: |
21 explicit DiscardableMemoryShmem(size_t bytes); | 17 explicit DiscardableMemoryShmem(size_t bytes); |
22 ~DiscardableMemoryShmem() override; | 18 ~DiscardableMemoryShmem() override; |
23 | 19 |
24 static void ReleaseFreeMemory(); | |
25 | |
26 static void PurgeForTesting(); | |
27 | |
28 bool Initialize(); | 20 bool Initialize(); |
29 | 21 |
30 // Overridden from DiscardableMemory: | 22 // Overridden from DiscardableMemory: |
31 DiscardableMemoryLockStatus Lock() override; | 23 DiscardableMemoryLockStatus Lock() override; |
32 void Unlock() override; | 24 void Unlock() override; |
33 void* Memory() const override; | 25 void* Memory() const override; |
34 | 26 |
35 // Overridden from internal::DiscardableMemoryManagerAllocation: | |
36 bool AllocateAndAcquireLock() override; | |
37 void ReleaseLock() override; | |
38 void Purge() override; | |
39 bool IsMemoryResident() const override; | |
40 | |
41 private: | 27 private: |
42 const size_t bytes_; | 28 const size_t bytes_; |
43 scoped_ptr<DiscardableMemoryShmemChunk> chunk_; | 29 scoped_ptr<DiscardableMemoryShmemChunk> chunk_; |
44 bool is_locked_; | 30 bool is_locked_; |
45 | 31 |
46 DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryShmem); | 32 DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryShmem); |
47 }; | 33 }; |
48 | 34 |
49 } // namespace internal | 35 } // namespace internal |
50 } // namespace base | 36 } // namespace base |
51 | 37 |
52 #endif // BASE_MEMORY_DISCARDABLE_MEMORY_SHMEM_H_ | 38 #endif // BASE_MEMORY_DISCARDABLE_MEMORY_SHMEM_H_ |
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