blob: 53b52a25d3f542a39320502160d609c869376052 [file] [log] [blame]
// Copyright 2018 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/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "ui/accelerated_widget_mac/ca_transaction_observer.h"
#include <memory>
namespace content {
class GpuProcessHost;
// Synchronizes CATransaction commits between the browser and GPU processes.
class CATransactionGPUCoordinator
: public ui::CATransactionCoordinator::PostCommitObserver {
static scoped_refptr<CATransactionGPUCoordinator> Create(
GpuProcessHost* host);
void HostWillBeDestroyed();
friend class base::RefCountedThreadSafe<CATransactionGPUCoordinator>;
CATransactionGPUCoordinator(GpuProcessHost* host);
~CATransactionGPUCoordinator() override;
// ui::CATransactionObserver implementation
void OnActivateForTransaction() override;
void OnEnterPostCommit() override;
bool ShouldWaitInPostCommit() override;
void AddPostCommitObserverOnUIThread();
void RemovePostCommitObserverOnUIThread();
void OnActivateForTransactionOnIO();
void OnEnterPostCommitOnIO();
void OnCommitCompletedOnIO();
void OnCommitCompletedOnUI();
// The GpuProcessHost to use to initiate GPU-side CATransactions. This is only
// to be accessed on the IO thread.
GpuProcessHost* host_ = nullptr;
// The number CATransactions that have not yet completed. This is only to be
// accessed on the UI thread.
int pending_commit_count_ = 0;
// Egregious state tracking to debug
bool registered_as_observer_ = false;
} // namespace content