mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
0c8fda2708
Don't emit a "VSYNC" event when running on Fuchsia, as traces on Fuchsia are typically recorded across the whole system, causing the events to collide with each other.
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
// Copyright 2015 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 "flutter/shell/common/vsync_waiter.h"
|
|
|
|
#include "flutter/fml/task_runner.h"
|
|
#include "flutter/fml/trace_event.h"
|
|
|
|
namespace shell {
|
|
|
|
VsyncWaiter::VsyncWaiter(blink::TaskRunners task_runners)
|
|
: task_runners_(std::move(task_runners)) {}
|
|
|
|
VsyncWaiter::~VsyncWaiter() = default;
|
|
|
|
void VsyncWaiter::AsyncWaitForVsync(Callback callback) {
|
|
{
|
|
std::lock_guard<std::mutex> lock(callback_mutex_);
|
|
callback_ = std::move(callback);
|
|
}
|
|
AwaitVSync();
|
|
}
|
|
|
|
void VsyncWaiter::FireCallback(fml::TimePoint frame_start_time,
|
|
fml::TimePoint frame_target_time) {
|
|
Callback callback;
|
|
|
|
{
|
|
std::lock_guard<std::mutex> lock(callback_mutex_);
|
|
callback = std::move(callback_);
|
|
}
|
|
|
|
if (!callback) {
|
|
return;
|
|
}
|
|
|
|
task_runners_.GetUITaskRunner()->PostTask(
|
|
[callback, frame_start_time, frame_target_time]() {
|
|
#if defined(OS_FUCHSIA)
|
|
// In general, traces on Fuchsia are recorded across the whole system.
|
|
// Because of this, emitting a "VSYNC" event per flutter process is
|
|
// undesirable, as the events will collide with each other. We
|
|
// instead let another area of the system emit them.
|
|
TRACE_EVENT0("flutter", "vsync callback");
|
|
#else
|
|
// Note: The tag name must be "VSYNC" (it is special) so that the
|
|
// "Highlight Vsync" checkbox in the timeline can be enabled.
|
|
TRACE_EVENT0("flutter", "VSYNC");
|
|
#endif
|
|
callback(frame_start_time, frame_target_time);
|
|
});
|
|
}
|
|
|
|
} // namespace shell
|