third_party/blink/renderer/core/dom/idle_deadline.cc

// 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 "third_party/blink/renderer/core/dom/idle_deadline.h"

#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/renderer/core/timing/performance.h"
#include "third_party/blink/renderer/platform/scheduler/public/thread_scheduler.h"
#include "third_party/blink/renderer/platform/wtf/time.h"

namespace blink {

IdleDeadline::IdleDeadline(TimeTicks deadline, CallbackType callback_type)
    : deadline_(deadline), callback_type_(callback_type) {}

double IdleDeadline::timeRemaining() const {
  TimeDelta time_remaining = deadline_ - CurrentTimeTicks();
  if (time_remaining < TimeDelta() ||
      ThreadScheduler::Current()->ShouldYieldForHighPriorityWork()) {
    return 0;
  }

  return 1000.0 * Performance::ClampTimeResolution(time_remaining.InSecondsF());
}

}  // namespace blink