| // 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. |
| |
| #include "base/memory/discardable_memory_malloc.h" |
| |
| #include "base/logging.h" |
| |
| namespace base { |
| namespace internal { |
| |
| DiscardableMemoryMalloc::DiscardableMemoryMalloc(size_t size) : size_(size) { |
| } |
| |
| DiscardableMemoryMalloc::~DiscardableMemoryMalloc() { |
| } |
| |
| bool DiscardableMemoryMalloc::Initialize() { |
| return Lock() != DISCARDABLE_MEMORY_LOCK_STATUS_FAILED; |
| } |
| |
| DiscardableMemoryLockStatus DiscardableMemoryMalloc::Lock() { |
| DCHECK(!memory_); |
| |
| memory_.reset(static_cast<uint8*>(malloc(size_))); |
| if (!memory_) |
| return DISCARDABLE_MEMORY_LOCK_STATUS_FAILED; |
| |
| return DISCARDABLE_MEMORY_LOCK_STATUS_PURGED; |
| } |
| |
| void DiscardableMemoryMalloc::Unlock() { |
| DCHECK(memory_); |
| memory_.reset(); |
| } |
| |
| void* DiscardableMemoryMalloc::Memory() const { |
| DCHECK(memory_); |
| return memory_.get(); |
| } |
| |
| } // namespace internal |
| } // namespace base |