15d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 25d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// found in the LICENSE file. 45d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 55d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "base/memory/discardable_memory_malloc.h" 65d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 75d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "base/logging.h" 85d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 95d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)namespace base { 105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)namespace internal { 115d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 125d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)DiscardableMemoryMalloc::DiscardableMemoryMalloc(size_t size) : size_(size) { 135d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 145d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)DiscardableMemoryMalloc::~DiscardableMemoryMalloc() { 165d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 175d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 185d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)bool DiscardableMemoryMalloc::Initialize() { 19cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return Lock() != DISCARDABLE_MEMORY_LOCK_STATUS_FAILED; 205d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 215d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 225d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)DiscardableMemoryLockStatus DiscardableMemoryMalloc::Lock() { 235d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) DCHECK(!memory_); 245d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 255d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) memory_.reset(static_cast<uint8*>(malloc(size_))); 265d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) if (!memory_) 275d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return DISCARDABLE_MEMORY_LOCK_STATUS_FAILED; 285d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 295d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return DISCARDABLE_MEMORY_LOCK_STATUS_PURGED; 305d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 315d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 325d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)void DiscardableMemoryMalloc::Unlock() { 335d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) DCHECK(memory_); 345d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) memory_.reset(); 355d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 365d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 375d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)void* DiscardableMemoryMalloc::Memory() const { 385d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) DCHECK(memory_); 395d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return memory_.get(); 405d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 415d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 425d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} // namespace internal 435d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} // namespace base 44