| // Copyright 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 "content/browser/renderer_host/frame_memory_manager.h" |
| |
| #include "base/logging.h" |
| #include "base/memory/singleton.h" |
| #include "base/sys_info.h" |
| |
| namespace content { |
| |
| namespace { |
| |
| size_t MaxNumberOfSavedFrames() { |
| return std::min(5, 2 + (base::SysInfo::AmountOfPhysicalMemoryMB() / 256)); |
| } |
| |
| } // namespace |
| |
| FrameMemoryManager* FrameMemoryManager::GetInstance() { |
| return Singleton<FrameMemoryManager>::get(); |
| } |
| |
| void FrameMemoryManager::AddFrame(FrameContainer* frame, bool visible) { |
| RemoveFrame(frame); |
| if (visible) |
| visible_frames_.insert(frame); |
| else |
| hidden_frames_.push_front(frame); |
| CullHiddenFrames(); |
| } |
| |
| void FrameMemoryManager::RemoveFrame(FrameContainer* frame) { |
| visible_frames_.erase(frame); |
| hidden_frames_.remove(frame); |
| } |
| |
| void FrameMemoryManager::SetFrameVisibility(FrameContainer* frame, |
| bool visible) { |
| if (visible) { |
| hidden_frames_.remove(frame); |
| visible_frames_.insert(frame); |
| } else { |
| visible_frames_.erase(frame); |
| hidden_frames_.push_front(frame); |
| CullHiddenFrames(); |
| } |
| } |
| |
| FrameMemoryManager::FrameMemoryManager() {} |
| |
| FrameMemoryManager::~FrameMemoryManager() {} |
| |
| void FrameMemoryManager::CullHiddenFrames() { |
| while (!hidden_frames_.empty() && |
| hidden_frames_.size() + visible_frames_.size() > |
| MaxNumberOfSavedFrames()) { |
| size_t old_size = hidden_frames_.size(); |
| // Should remove self from list. |
| hidden_frames_.back()->ReleaseCurrentFrame(); |
| DCHECK_EQ(hidden_frames_.size() + 1, old_size); |
| } |
| } |
| |
| } // namespace content |