| /* |
| * Copyright (C) 2008 Apple Inc. All Rights Reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include "third_party/blink/renderer/core/frame/pausable_timer.h" |
| |
| #include "third_party/blink/public/platform/task_type.h" |
| |
| namespace blink { |
| |
| namespace { |
| // TimerBase::NextFireIntervalDelta returns a delta >= 0. |
| constexpr TimeDelta kNextFireIntervalInvalid = TimeDelta::Min(); |
| } // namespace |
| |
| PausableTimer::PausableTimer(ExecutionContext* context, TaskType task_type) |
| : TimerBase(context->GetTaskRunner(task_type)), |
| PausableObject(context), |
| next_fire_interval_(kNextFireIntervalInvalid) { |
| DCHECK(context); |
| } |
| |
| PausableTimer::~PausableTimer() = default; |
| |
| void PausableTimer::Stop() { |
| next_fire_interval_ = kNextFireIntervalInvalid; |
| TimerBase::Stop(); |
| } |
| |
| void PausableTimer::ContextDestroyed(ExecutionContext*) { |
| Stop(); |
| } |
| |
| void PausableTimer::Pause() { |
| #if DCHECK_IS_ON() |
| DCHECK(!paused_); |
| paused_ = true; |
| #endif |
| if (IsActive()) { |
| next_fire_interval_ = NextFireInterval(); |
| DCHECK_GE(next_fire_interval_, TimeDelta()); |
| repeat_interval_ = RepeatInterval(); |
| TimerBase::Stop(); |
| } |
| } |
| |
| void PausableTimer::Unpause() { |
| #if DCHECK_IS_ON() |
| DCHECK(paused_); |
| paused_ = false; |
| #endif |
| if (next_fire_interval_ >= TimeDelta()) { |
| // start() was called before, therefore location() is already set. |
| // m_nextFireInterval is only set in suspend() if the Timer was active. |
| Start(next_fire_interval_, repeat_interval_, GetLocation()); |
| next_fire_interval_ = kNextFireIntervalInvalid; |
| } |
| } |
| |
| } // namespace blink |