104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
// Copyright 2012 The Chromium Authors
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "net/quic/quic_chromium_alarm_factory.h"
|
|
|
|
#include "base/check.h"
|
|
#include "base/functional/bind.h"
|
|
#include "base/location.h"
|
|
#include "base/memory/raw_ptr.h"
|
|
#include "base/task/sequenced_task_runner.h"
|
|
#include "base/time/tick_clock.h"
|
|
#include "base/time/time.h"
|
|
#include "base/timer/timer.h"
|
|
#include "net/quic/platform/impl/quic_chromium_clock.h"
|
|
|
|
namespace net {
|
|
|
|
namespace {
|
|
|
|
class QuicChromeAlarm : public quic::QuicAlarm, public base::TickClock {
|
|
public:
|
|
QuicChromeAlarm(const quic::QuicClock* clock,
|
|
base::SequencedTaskRunner* task_runner,
|
|
quic::QuicArenaScopedPtr<quic::QuicAlarm::Delegate> delegate)
|
|
: quic::QuicAlarm(std::move(delegate)),
|
|
clock_(clock),
|
|
// Unretained is safe because base::OneShotTimer never runs its task
|
|
// after being deleted.
|
|
on_alarm_callback_(base::BindRepeating(&QuicChromeAlarm::OnAlarm,
|
|
base::Unretained(this))),
|
|
timer_(std::make_unique<base::OneShotTimer>(this)) {
|
|
timer_->SetTaskRunner(task_runner);
|
|
}
|
|
|
|
protected:
|
|
void SetImpl() override {
|
|
DCHECK(deadline().IsInitialized());
|
|
const int64_t delay_us = (deadline() - clock_->Now()).ToMicroseconds();
|
|
timer_->Start(FROM_HERE, base::Microseconds(delay_us), on_alarm_callback_);
|
|
}
|
|
|
|
void CancelImpl() override {
|
|
DCHECK(!deadline().IsInitialized());
|
|
timer_->Stop();
|
|
}
|
|
|
|
private:
|
|
void OnAlarm() {
|
|
DCHECK(deadline().IsInitialized());
|
|
|
|
// In tests, the time source used by the scheduler may not be in sync with
|
|
// |clock_|. Because of this, the scheduler may run this task when
|
|
// |clock->Now()| is smaller than |deadline()|. In that case, retry later.
|
|
// This shouldn't happen in production.
|
|
if (clock_->Now() < deadline()) {
|
|
SetImpl();
|
|
return;
|
|
}
|
|
|
|
DCHECK_LE(deadline(), clock_->Now());
|
|
Fire();
|
|
}
|
|
|
|
// base::TickClock:
|
|
base::TimeTicks NowTicks() const override {
|
|
return quic::QuicChromiumClock::QuicTimeToTimeTicks(clock_->Now());
|
|
}
|
|
|
|
const raw_ptr<const quic::QuicClock> clock_;
|
|
base::RepeatingClosure on_alarm_callback_;
|
|
const std::unique_ptr<base::OneShotTimer> timer_;
|
|
};
|
|
|
|
} // namespace
|
|
|
|
QuicChromiumAlarmFactory::QuicChromiumAlarmFactory(
|
|
base::SequencedTaskRunner* task_runner,
|
|
const quic::QuicClock* clock)
|
|
: task_runner_(task_runner), clock_(clock) {}
|
|
|
|
QuicChromiumAlarmFactory::~QuicChromiumAlarmFactory() = default;
|
|
|
|
quic::QuicArenaScopedPtr<quic::QuicAlarm> QuicChromiumAlarmFactory::CreateAlarm(
|
|
quic::QuicArenaScopedPtr<quic::QuicAlarm::Delegate> delegate,
|
|
quic::QuicConnectionArena* arena) {
|
|
if (arena != nullptr) {
|
|
return arena->New<QuicChromeAlarm>(clock_, task_runner_,
|
|
std::move(delegate));
|
|
} else {
|
|
return quic::QuicArenaScopedPtr<quic::QuicAlarm>(
|
|
new QuicChromeAlarm(clock_, task_runner_, std::move(delegate)));
|
|
}
|
|
}
|
|
|
|
quic::QuicAlarm* QuicChromiumAlarmFactory::CreateAlarm(
|
|
quic::QuicAlarm::Delegate* delegate) {
|
|
return new QuicChromeAlarm(
|
|
clock_, task_runner_,
|
|
quic::QuicArenaScopedPtr<quic::QuicAlarm::Delegate>(delegate));
|
|
}
|
|
|
|
} // namespace net
|