dsh@google.com
8ccfd90299
Review URL: http://codereview.chromium.org/7995 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@4022 0039d316-1c4b-4281-b951-d872f2087c98
78 linhas
2.0 KiB
C++
78 linhas
2.0 KiB
C++
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/message_pump_default.h"
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#include "base/logging.h"
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#include "base/scoped_nsautorelease_pool.h"
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namespace base {
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MessagePumpDefault::MessagePumpDefault()
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: keep_running_(true),
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event_(false, false) {
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}
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void MessagePumpDefault::Run(Delegate* delegate) {
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DCHECK(keep_running_) << "Quit must have been called outside of Run!";
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for (;;) {
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ScopedNSAutoreleasePool autorelease_pool;
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bool did_work = delegate->DoWork();
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if (!keep_running_)
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break;
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did_work |= delegate->DoDelayedWork(&delayed_work_time_);
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if (!keep_running_)
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break;
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if (did_work)
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continue;
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did_work = delegate->DoIdleWork();
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if (!keep_running_)
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break;
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if (did_work)
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continue;
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if (delayed_work_time_.is_null()) {
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event_.Wait();
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} else {
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TimeDelta delay = delayed_work_time_ - Time::Now();
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if (delay > TimeDelta()) {
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event_.TimedWait(delay);
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} else {
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// It looks like delayed_work_time_ indicates a time in the past, so we
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// need to call DoDelayedWork now.
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delayed_work_time_ = Time();
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}
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}
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// Since event_ is auto-reset, we don't need to do anything special here
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// other than service each delegate method.
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}
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keep_running_ = true;
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}
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void MessagePumpDefault::Quit() {
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keep_running_ = false;
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}
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void MessagePumpDefault::ScheduleWork() {
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// Since this can be called on any thread, we need to ensure that our Run
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// loop wakes up.
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event_.Signal();
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}
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void MessagePumpDefault::ScheduleDelayedWork(const Time& delayed_work_time) {
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// We know that we can't be blocked on Wait right now since this method can
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// only be called on the same thread as Run, so we only need to update our
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// record of how long to sleep when we do sleep.
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delayed_work_time_ = delayed_work_time;
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}
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} // namespace base
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