| // 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_SHMEM_H_ |
| #define BASE_MEMORY_DISCARDABLE_MEMORY_SHMEM_H_ |
| |
| #include "base/memory/discardable_memory.h" |
| |
| #include "base/memory/discardable_memory_manager.h" |
| |
| namespace base { |
| class DiscardableMemoryShmemChunk; |
| |
| namespace internal { |
| |
| class DiscardableMemoryShmem |
| : public DiscardableMemory, |
| public internal::DiscardableMemoryManagerAllocation { |
| public: |
| explicit DiscardableMemoryShmem(size_t bytes); |
| ~DiscardableMemoryShmem() override; |
| |
| static void ReleaseFreeMemory(); |
| |
| 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: |
| const size_t bytes_; |
| scoped_ptr<DiscardableMemoryShmemChunk> chunk_; |
| bool is_locked_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryShmem); |
| }; |
| |
| } // namespace internal |
| } // namespace base |
| |
| #endif // BASE_MEMORY_DISCARDABLE_MEMORY_SHMEM_H_ |