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// Copyright 2016 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 "net/nqe/socket_watcher.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/single_thread_task_runner.h"
#include "base/time/tick_clock.h"
#include "base/time/time.h"
namespace net {
namespace nqe {
namespace internal {
SocketWatcher::SocketWatcher(
SocketPerformanceWatcherFactory::Protocol protocol,
base::TimeDelta min_notification_interval,
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
OnUpdatedRTTAvailableCallback updated_rtt_observation_callback,
base::TickClock* tick_clock)
: protocol_(protocol),
task_runner_(std::move(task_runner)),
updated_rtt_observation_callback_(updated_rtt_observation_callback),
rtt_notifications_minimum_interval_(min_notification_interval),
tick_clock_(tick_clock) {
DCHECK(tick_clock_);
}
SocketWatcher::~SocketWatcher() {}
bool SocketWatcher::ShouldNotifyUpdatedRTT() const {
DCHECK(thread_checker_.CalledOnValidThread());
// Do not allow incoming notifications if the last notification was more
// recent than |rtt_notifications_minimum_interval_| ago. This helps in
// reducing the overhead of obtaining the RTT values.
return tick_clock_->NowTicks() - last_rtt_notification_ >=
rtt_notifications_minimum_interval_;
}
void SocketWatcher::OnUpdatedRTTAvailable(const base::TimeDelta& rtt) {
DCHECK(thread_checker_.CalledOnValidThread());
last_rtt_notification_ = tick_clock_->NowTicks();
task_runner_->PostTask(
FROM_HERE, base::Bind(updated_rtt_observation_callback_, protocol_, rtt));
}
void SocketWatcher::OnConnectionChanged() {
DCHECK(thread_checker_.CalledOnValidThread());
}
} // namespace internal
} // namespace nqe
} // namespace net
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