| // 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/renderer_frame_manager.h" |
| |
| #include <algorithm> |
| |
| #include "base/logging.h" |
| #include "base/memory/shared_memory.h" |
| #include "base/sys_info.h" |
| #include "content/common/host_shared_bitmap_manager.h" |
| |
| namespace content { |
| |
| RendererFrameManager* RendererFrameManager::GetInstance() { |
| return Singleton<RendererFrameManager>::get(); |
| } |
| |
| void RendererFrameManager::AddFrame(RendererFrameManagerClient* frame, |
| bool locked) { |
| RemoveFrame(frame); |
| if (locked) |
| locked_frames_[frame] = 1; |
| else |
| unlocked_frames_.push_front(frame); |
| CullUnlockedFrames(); |
| } |
| |
| void RendererFrameManager::RemoveFrame(RendererFrameManagerClient* frame) { |
| std::map<RendererFrameManagerClient*, size_t>::iterator locked_iter = |
| locked_frames_.find(frame); |
| if (locked_iter != locked_frames_.end()) |
| locked_frames_.erase(locked_iter); |
| unlocked_frames_.remove(frame); |
| } |
| |
| void RendererFrameManager::LockFrame(RendererFrameManagerClient* frame) { |
| std::list<RendererFrameManagerClient*>::iterator unlocked_iter = |
| std::find(unlocked_frames_.begin(), unlocked_frames_.end(), frame); |
| if (unlocked_iter != unlocked_frames_.end()) { |
| DCHECK(locked_frames_.find(frame) == locked_frames_.end()); |
| unlocked_frames_.remove(frame); |
| locked_frames_[frame] = 1; |
| } else { |
| DCHECK(locked_frames_.find(frame) != locked_frames_.end()); |
| locked_frames_[frame]++; |
| } |
| } |
| |
| void RendererFrameManager::UnlockFrame(RendererFrameManagerClient* frame) { |
| DCHECK(locked_frames_.find(frame) != locked_frames_.end()); |
| size_t locked_count = locked_frames_[frame]; |
| DCHECK(locked_count); |
| if (locked_count > 1) { |
| locked_frames_[frame]--; |
| } else { |
| RemoveFrame(frame); |
| unlocked_frames_.push_front(frame); |
| CullUnlockedFrames(); |
| } |
| } |
| |
| RendererFrameManager::RendererFrameManager() { |
| max_number_of_saved_frames_ = |
| #if defined(OS_ANDROID) |
| 1; |
| #else |
| std::min(5, 2 + (base::SysInfo::AmountOfPhysicalMemoryMB() / 256)); |
| #endif |
| max_handles_ = base::SharedMemory::GetHandleLimit() / 8.0f; |
| } |
| |
| RendererFrameManager::~RendererFrameManager() {} |
| |
| void RendererFrameManager::CullUnlockedFrames() { |
| uint32 saved_frame_limit = max_number_of_saved_frames(); |
| |
| if (unlocked_frames_.size() + locked_frames_.size() > 0) { |
| float handles_per_frame = |
| HostSharedBitmapManager::current()->AllocatedBitmapCount() * 1.0f / |
| (unlocked_frames_.size() + locked_frames_.size()); |
| |
| saved_frame_limit = std::max( |
| 1, |
| static_cast<int>(std::min(static_cast<float>(saved_frame_limit), |
| max_handles_ / handles_per_frame))); |
| } |
| while (!unlocked_frames_.empty() && |
| unlocked_frames_.size() + locked_frames_.size() > saved_frame_limit) { |
| size_t old_size = unlocked_frames_.size(); |
| // Should remove self from list. |
| unlocked_frames_.back()->EvictCurrentFrame(); |
| DCHECK_EQ(unlocked_frames_.size() + 1, old_size); |
| } |
| } |
| |
| } // namespace content |