| // Copyright (c) 2013 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. |
| |
| #include "base/memory/discardable_memory.h" |
| |
| #include "base/logging.h" |
| |
| namespace base { |
| |
| DiscardableMemory::DiscardableMemory() |
| : memory_(NULL), |
| size_(0), |
| is_locked_(false) |
| #if defined(OS_ANDROID) |
| , fd_(-1) |
| #endif // OS_ANDROID |
| { |
| DCHECK(Supported()); |
| } |
| |
| void* DiscardableMemory::Memory() const { |
| DCHECK(is_locked_); |
| return memory_; |
| } |
| |
| // Stub implementations for platforms that don't support discardable memory. |
| |
| #if !defined(OS_ANDROID) && !defined(OS_MACOSX) |
| |
| DiscardableMemory::~DiscardableMemory() { |
| NOTIMPLEMENTED(); |
| } |
| |
| // static |
| bool DiscardableMemory::Supported() { |
| return false; |
| } |
| |
| bool DiscardableMemory::InitializeAndLock(size_t size) { |
| NOTIMPLEMENTED(); |
| return false; |
| } |
| |
| LockDiscardableMemoryStatus DiscardableMemory::Lock() { |
| NOTIMPLEMENTED(); |
| return DISCARDABLE_MEMORY_FAILED; |
| } |
| |
| void DiscardableMemory::Unlock() { |
| NOTIMPLEMENTED(); |
| } |
| |
| // static |
| bool DiscardableMemory::PurgeForTestingSupported() { |
| return false; |
| } |
| |
| // static |
| void DiscardableMemory::PurgeForTesting() { |
| NOTIMPLEMENTED(); |
| } |
| |
| #endif // OS_* |
| |
| } // namespace base |