Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
// Copyright (c) 2006-2008 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 "base/message_pump_default.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/scoped_nsautorelease_pool.h"
#include "mozilla/BackgroundHangMonitor.h"
#include "mozilla/ProfilerLabels.h"
#include "mozilla/ProfilerThreadSleep.h"
namespace base {
MessagePumpDefault::MessagePumpDefault()
: keep_running_(true), event_(false, false) {}
void MessagePumpDefault::Run(Delegate* delegate) {
AUTO_PROFILER_LABEL("MessagePumpDefault::Run", OTHER);
DCHECK(keep_running_) << "Quit must have been called outside of Run!";
const MessageLoop* const loop = MessageLoop::current();
mozilla::BackgroundHangMonitor hangMonitor(loop->thread_name().c_str(),
loop->transient_hang_timeout(),
loop->permanent_hang_timeout());
for (;;) {
ScopedNSAutoreleasePool autorelease_pool;
hangMonitor.NotifyActivity();
bool did_work = delegate->DoWork();
if (!keep_running_) break;
hangMonitor.NotifyActivity();
did_work |= delegate->DoDelayedWork(&delayed_work_time_);
if (!keep_running_) break;
if (did_work) continue;
hangMonitor.NotifyActivity();
did_work = delegate->DoIdleWork();
if (!keep_running_) break;
if (did_work) continue;
if (delayed_work_time_.is_null()) {
hangMonitor.NotifyWait();
AUTO_PROFILER_LABEL("MessagePumpDefault::Run:Wait", IDLE);
{
AUTO_PROFILER_THREAD_SLEEP;
event_.Wait();
}
} else {
TimeDelta delay = delayed_work_time_ - TimeTicks::Now();
if (delay > TimeDelta()) {
hangMonitor.NotifyWait();
AUTO_PROFILER_LABEL("MessagePumpDefault::Run:Wait", IDLE);
{
AUTO_PROFILER_THREAD_SLEEP;
event_.TimedWait(delay);
}
} else {
// It looks like delayed_work_time_ indicates a time in the past, so we
// need to call DoDelayedWork now.
delayed_work_time_ = TimeTicks();
}
}
// Since event_ is auto-reset, we don't need to do anything special here
// other than service each delegate method.
}
keep_running_ = true;
}
void MessagePumpDefault::Quit() { keep_running_ = false; }
void MessagePumpDefault::ScheduleWork() {
// Since this can be called on any thread, we need to ensure that our Run
// loop wakes up.
event_.Signal();
}
void MessagePumpDefault::ScheduleDelayedWork(
const TimeTicks& delayed_work_time) {
// We know that we can't be blocked on Wait right now since this method can
// only be called on the same thread as Run, so we only need to update our
// record of how long to sleep when we do sleep.
delayed_work_time_ = delayed_work_time;
}
} // namespace base