blob: 3b84701952ab397d5932e5c32aac9000d8e64737 [file] [log] [blame]
/*
* Copyright 2019 The WebRTC 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 in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/task_utils/repeating_task.h"
#include "absl/memory/memory.h"
#include "rtc_base/logging.h"
#include "rtc_base/task_utils/to_queued_task.h"
#include "rtc_base/time_utils.h"
namespace webrtc {
namespace webrtc_repeating_task_impl {
RepeatingTaskBase::RepeatingTaskBase(TaskQueueBase* task_queue,
TimeDelta first_delay)
: task_queue_(task_queue),
next_run_time_(Timestamp::Micros(rtc::TimeMicros()) + first_delay) {
}
RepeatingTaskBase::~RepeatingTaskBase() = default;
bool RepeatingTaskBase::Run() {
RTC_DCHECK_RUN_ON(task_queue_);
// Return true to tell the TaskQueue to destruct this object.
if (next_run_time_.IsPlusInfinity())
return true;
TimeDelta delay = RunClosure();
// The closure might have stopped this task, in which case we return true to
// destruct this object.
if (next_run_time_.IsPlusInfinity())
return true;
RTC_DCHECK(delay.IsFinite());
TimeDelta lost_time = Timestamp::Micros(rtc::TimeMicros()) - next_run_time_;
next_run_time_ += delay;
delay -= lost_time;
delay = std::max(delay, TimeDelta::Zero());
task_queue_->PostDelayedTask(absl::WrapUnique(this), delay.ms());
// Return false to tell the TaskQueue to not destruct this object since we
// have taken ownership with absl::WrapUnique.
return false;
}
void RepeatingTaskBase::Stop() {
RTC_DCHECK_RUN_ON(task_queue_);
RTC_DCHECK(next_run_time_.IsFinite());
next_run_time_ = Timestamp::PlusInfinity();
}
} // namespace webrtc_repeating_task_impl
RepeatingTaskHandle::RepeatingTaskHandle(RepeatingTaskHandle&& other)
: repeating_task_(other.repeating_task_) {
other.repeating_task_ = nullptr;
}
RepeatingTaskHandle& RepeatingTaskHandle::operator=(
RepeatingTaskHandle&& other) {
repeating_task_ = other.repeating_task_;
other.repeating_task_ = nullptr;
return *this;
}
RepeatingTaskHandle::RepeatingTaskHandle(
webrtc_repeating_task_impl::RepeatingTaskBase* repeating_task)
: repeating_task_(repeating_task) {}
void RepeatingTaskHandle::Stop() {
if (repeating_task_) {
repeating_task_->Stop();
repeating_task_ = nullptr;
}
}
bool RepeatingTaskHandle::Running() const {
return repeating_task_ != nullptr;
}
} // namespace webrtc