| // 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_ASHMEM_H_ |
| #define BASE_MEMORY_DISCARDABLE_MEMORY_ASHMEM_H_ |
| |
| #include "base/memory/discardable_memory.h" |
| |
| #include "base/macros.h" |
| #include "base/memory/discardable_memory_manager.h" |
| |
| namespace base { |
| namespace internal { |
| |
| class DiscardableAshmemChunk; |
| class DiscardableMemoryAshmemAllocator; |
| class DiscardableMemoryManager; |
| |
| class DiscardableMemoryAshmem |
| : public DiscardableMemory, |
| public internal::DiscardableMemoryManagerAllocation { |
| public: |
| explicit DiscardableMemoryAshmem(size_t bytes, |
| DiscardableMemoryAshmemAllocator* allocator, |
| DiscardableMemoryManager* manager); |
| |
| ~DiscardableMemoryAshmem() override; |
| |
| 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_; |
| DiscardableMemoryAshmemAllocator* const allocator_; |
| DiscardableMemoryManager* const manager_; |
| bool is_locked_; |
| scoped_ptr<DiscardableAshmemChunk> ashmem_chunk_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryAshmem); |
| }; |
| |
| } // namespace internal |
| } // namespace base |
| |
| #endif // BASE_MEMORY_DISCARDABLE_MEMORY_ASHMEM_H_ |