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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_GPU_CA_TRANSACTION_GPU_COORDINATOR_H_
#define CONTENT_BROWSER_GPU_CA_TRANSACTION_GPU_COORDINATOR_H_
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "ui/accelerated_widget_mac/ca_transaction_observer.h"
namespace content {
class GpuProcessHost;
// Synchronizes CATransaction commits between the browser and GPU processes.
class CATransactionGPUCoordinator
: public ui::CATransactionCoordinator::PostCommitObserver {
public:
static scoped_refptr<CATransactionGPUCoordinator> Create(
GpuProcessHost* host);
CATransactionGPUCoordinator(const CATransactionGPUCoordinator&) = delete;
CATransactionGPUCoordinator& operator=(const CATransactionGPUCoordinator&) =
delete;
void HostWillBeDestroyed();
private:
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 OnCommitCompletedOnProcessThread();
void OnCommitCompletedOnUI();
// The GpuProcessHost to use to initiate GPU-side CATransactions. This is only
// to be accessed on the IO thread.
raw_ptr<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 https://crbug.com/871430
bool registered_as_observer_ = false;
};
} // namespace content
#endif // CONTENT_BROWSER_GPU_CA_TRANSACTION_GPU_COORDINATOR_H_
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