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// Copyright 2019 the V8 project 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 "src/libplatform/tracing/perfetto-tasks.h"
#include "src/base/platform/semaphore.h"
#include "src/base/platform/time.h"
namespace v8 {
namespace platform {
namespace tracing {
PerfettoTaskRunner::PerfettoTaskRunner() : runner_(1, DefaultTimeFunction) {}
PerfettoTaskRunner::~PerfettoTaskRunner() { runner_.Terminate(); }
// static
double PerfettoTaskRunner::DefaultTimeFunction() {
return (base::TimeTicks::HighResolutionNow() - base::TimeTicks())
.InSecondsF();
}
void PerfettoTaskRunner::PostTask(std::function<void()> f) {
runner_.PostTask(base::make_unique<TracingTask>(std::move(f)));
}
void PerfettoTaskRunner::PostDelayedTask(std::function<void()> f,
uint32_t delay_ms) {
double delay_in_seconds =
delay_ms / static_cast<double>(base::Time::kMillisecondsPerSecond);
runner_.PostDelayedTask(base::make_unique<TracingTask>(std::move(f)),
delay_in_seconds);
}
bool PerfettoTaskRunner::RunsTasksOnCurrentThread() const {
return runner_.RunsTasksOnCurrentThread();
}
void PerfettoTaskRunner::FinishImmediateTasks() {
DCHECK(!RunsTasksOnCurrentThread());
base::Semaphore semaphore(0);
// PostTask has guaranteed ordering so this will be the last task executed.
runner_.PostTask(
base::make_unique<TracingTask>([&semaphore] { semaphore.Signal(); }));
semaphore.Wait();
}
} // namespace tracing
} // namespace platform
} // namespace v8
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