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58e84c8bf0
* Re-land "Support multiple shells in a single process. (#4932)" This reverts commit 723c7d01439da4261bc836075fb55651ce9e7f03.
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/shell/common/vsync_waiter.h"
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#include "flutter/fml/task_runner.h"
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#include "flutter/fml/trace_event.h"
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namespace shell {
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VsyncWaiter::VsyncWaiter(blink::TaskRunners task_runners)
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: task_runners_(std::move(task_runners)) {}
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VsyncWaiter::~VsyncWaiter() = default;
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void VsyncWaiter::AsyncWaitForVsync(Callback callback) {
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{
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std::lock_guard<std::mutex> lock(callback_mutex_);
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callback_ = std::move(callback);
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}
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AwaitVSync();
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}
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void VsyncWaiter::FireCallback(fxl::TimePoint frame_start_time,
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fxl::TimePoint frame_target_time) {
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Callback callback;
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{
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std::lock_guard<std::mutex> lock(callback_mutex_);
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callback = std::move(callback_);
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}
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if (!callback) {
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return;
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}
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task_runners_.GetUITaskRunner()->PostTask(
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[callback, frame_start_time, frame_target_time]() {
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// Note: The tag name must be "VSYNC" (it is special) so that the
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// "Highlight
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// Vsync" checkbox in the timeline can be enabled.
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TRACE_EVENT0("flutter", "VSYNC");
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callback(frame_start_time, frame_target_time);
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});
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}
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} // namespace shell
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