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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_TREES_LATENCY_INFO_SWAP_PROMISE_MONITOR_H_
#define CC_TREES_LATENCY_INFO_SWAP_PROMISE_MONITOR_H_
#include "base/memory/raw_ptr.h"
#include "base/sequence_checker.h"
#include "cc/cc_export.h"
namespace ui {
class LatencyInfo;
}
namespace cc {
class LayerTreeHostImpl;
class SwapPromiseManager;
// A `LatencyInfoSwapPromiseMonitor` is used to monitor compositor state change
// that should be associated with a `LatencyInfoSwapPromise`, e.g.
// `SetNeedsCommit()` is called on the main thread or `SetNeedsRedraw()` is
// called on the compositor thread.
//
// Creating a `LatencyInfoSwapPromiseMonitor` will insert it into a
// `SwapPromiseManager` or `LayerTreeHostImpl`, depending on the constructor
// used.
//
// Notification of compositor state change will be sent through
// `OnSetNeedsCommitOnMain()` or `OnSetNeedsRedrawOnImpl()`. Note that multiple
// notifications of the same type to the same monitor will only queue one
// `LatencyInfoSwapPromise`.
//
// When `LatencyInfoSwapPromiseMonitor` is destroyed, it will unregister itself
// from `SwapPromiseManager` or `LayerTreeHostImpl`.
class CC_EXPORT LatencyInfoSwapPromiseMonitor {
public:
// Constructor for when the monitor lives on the main thread.
LatencyInfoSwapPromiseMonitor(ui::LatencyInfo* latency,
SwapPromiseManager* swap_promise_manager);
// Constructor for when the monitor lives on the compositor thread.
LatencyInfoSwapPromiseMonitor(ui::LatencyInfo* latency,
LayerTreeHostImpl* host_impl);
LatencyInfoSwapPromiseMonitor(const LatencyInfoSwapPromiseMonitor&) = delete;
LatencyInfoSwapPromiseMonitor& operator=(
const LatencyInfoSwapPromiseMonitor&) = delete;
virtual ~LatencyInfoSwapPromiseMonitor();
// Virtual so that tests can mock them.
virtual void OnSetNeedsCommitOnMain();
virtual void OnSetNeedsRedrawOnImpl();
private:
const raw_ptr<ui::LatencyInfo> latency_;
const raw_ptr<SwapPromiseManager> swap_promise_manager_ = nullptr;
const raw_ptr<LayerTreeHostImpl> host_impl_ = nullptr;
SEQUENCE_CHECKER(main_sequence_checker_);
SEQUENCE_CHECKER(impl_sequence_checker_);
};
} // namespace cc
#endif // CC_TREES_LATENCY_INFO_SWAP_PROMISE_MONITOR_H_
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