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// Copyright 2016 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_SWAP_PROMISE_MANAGER_H_
#define CC_TREES_SWAP_PROMISE_MANAGER_H_
#include <memory>
#include <set>
#include <vector>
#include "base/memory/raw_ptr.h"
#include "cc/cc_export.h"
#include "cc/trees/swap_promise.h"
namespace cc {
class LatencyInfoSwapPromiseMonitor;
class SwapPromise;
class CC_EXPORT SwapPromiseManager {
public:
SwapPromiseManager();
SwapPromiseManager(const SwapPromiseManager&) = delete;
~SwapPromiseManager();
SwapPromiseManager& operator=(const SwapPromiseManager&) = delete;
// Call this function when you expect there to be a swap buffer.
// See swap_promise.h for how to use SwapPromise.
void QueueSwapPromise(std::unique_ptr<SwapPromise> swap_promise);
// When a `LatencyInfoSwapPromiseMonitor` is created on the main thread, it
// calls `InsertLatencyInfoSwapPromiseMonitor()` to register itself with
// `LayerTreeHost`. When the monitor is destroyed, it calls
// `RemoveLatencyInfoSwapPromiseMonitor()` to unregister itself.
void InsertLatencyInfoSwapPromiseMonitor(
LatencyInfoSwapPromiseMonitor* monitor);
void RemoveLatencyInfoSwapPromiseMonitor(
LatencyInfoSwapPromiseMonitor* monitor);
// Called when a commit request is made on the LayerTreeHost.
void NotifyLatencyInfoSwapPromiseMonitors();
// Called before the commit of the main thread state will be started.
void WillCommit();
// The current swap promise list is moved to the caller.
std::vector<std::unique_ptr<SwapPromise>> TakeSwapPromises();
// Breaks the currently queued swap promises with the specified reason.
void BreakSwapPromises(SwapPromise::DidNotSwapReason reason);
size_t num_queued_swap_promises() const { return swap_promise_list_.size(); }
private:
std::vector<std::unique_ptr<SwapPromise>> swap_promise_list_;
std::set<raw_ptr<LatencyInfoSwapPromiseMonitor, SetExperimental>>
latency_info_swap_promise_monitors_;
};
} // namespace cc
#endif // CC_TREES_SWAP_PROMISE_MANAGER_H_
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