103 lines
1.9 KiB
C++
103 lines
1.9 KiB
C++
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// Copyright (c) 2011, NetEase Inc. All rights reserved.
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//
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// Author: wrt(guangguang)
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// Date: 2011/6/24
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//
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// A implemetation of a cross flatform waitable event based message loop
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#include "base/framework/default_message_pump.h"
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#include <cassert>
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namespace nbase
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{
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DefaultMessagePump::DefaultMessagePump() :
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event_(false, false),
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should_quit_(0)
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{
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}
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void DefaultMessagePump::Run(Delegate* delegate)
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{
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// Quit must have been called outside of Run!
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assert(should_quit_ == false);
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for (;;)
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{
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bool did_work = delegate->DoWork();
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if (should_quit_)
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break;
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did_work |= delegate->DoDelayedWork(&delayed_work_time_);
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if (should_quit_)
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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 (should_quit_)
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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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{
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Wait();
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}
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else
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{
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TimeDelta delay = delayed_work_time_ - TimeTicks::Now();
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if (delay > TimeDelta())
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WaitTimeout(delay);
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else
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{
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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_ = TimeTicks();
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}
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}
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}
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should_quit_ = false;
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}
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void DefaultMessagePump::Quit()
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{
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should_quit_ = true;
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}
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void DefaultMessagePump::ScheduleWork()
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{
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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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Wakeup();
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}
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void DefaultMessagePump::ScheduleDelayedWork(const TimeTicks& delayed_work_time)
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{
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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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void DefaultMessagePump::Wait()
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{
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event_.Wait();
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}
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void DefaultMessagePump::WaitTimeout(const TimeDelta &timeout)
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{
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event_.WaitTimeout(timeout);
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}
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void DefaultMessagePump::Wakeup()
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{
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event_.Signal();
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}
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}
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