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comparison: ipc/chromium/src/base/message_pump_default.cc
ipc/chromium/src/base/message_pump_default.cc
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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/message_pump_default.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "base/message_loop.h" | |
| 9 #include "base/scoped_nsautorelease_pool.h" | |
| 10 #include "GeckoProfiler.h" | |
| 11 | |
| 12 #include "mozilla/BackgroundHangMonitor.h" | |
| 13 | |
| 14 namespace base { | |
| 15 | |
| 16 MessagePumpDefault::MessagePumpDefault() | |
| 17 : keep_running_(true), | |
| 18 event_(false, false) { | |
| 19 } | |
| 20 | |
| 21 void MessagePumpDefault::Run(Delegate* delegate) { | |
| 22 DCHECK(keep_running_) << "Quit must have been called outside of Run!"; | |
| 23 | |
| 24 const MessageLoop* const loop = MessageLoop::current(); | |
| 25 mozilla::BackgroundHangMonitor hangMonitor( | |
| 26 loop->thread_name().c_str(), | |
| 27 loop->transient_hang_timeout(), | |
| 28 loop->permanent_hang_timeout()); | |
| 29 | |
| 30 for (;;) { | |
| 31 ScopedNSAutoreleasePool autorelease_pool; | |
| 32 | |
| 33 hangMonitor.NotifyActivity(); | |
| 34 bool did_work = delegate->DoWork(); | |
| 35 if (!keep_running_) | |
| 36 break; | |
| 37 | |
| 38 hangMonitor.NotifyActivity(); | |
| 39 did_work |= delegate->DoDelayedWork(&delayed_work_time_); | |
| 40 if (!keep_running_) | |
| 41 break; | |
| 42 | |
| 43 if (did_work) | |
| 44 continue; | |
| 45 | |
| 46 hangMonitor.NotifyActivity(); | |
| 47 did_work = delegate->DoIdleWork(); | |
| 48 if (!keep_running_) | |
| 49 break; | |
| 50 | |
| 51 if (did_work) | |
| 52 continue; | |
| 53 | |
| 54 if (delayed_work_time_.is_null()) { | |
| 55 hangMonitor.NotifyWait(); | |
| 56 PROFILER_LABEL("MessagePump", "Wait"); | |
| 57 { | |
| 58 GeckoProfilerSleepRAII profiler_sleep; | |
| 59 event_.Wait(); | |
| 60 } | |
| 61 } else { | |
| 62 TimeDelta delay = delayed_work_time_ - TimeTicks::Now(); | |
| 63 if (delay > TimeDelta()) { | |
| 64 hangMonitor.NotifyWait(); | |
| 65 PROFILER_LABEL("MessagePump", "Wait"); | |
| 66 { | |
| 67 GeckoProfilerSleepRAII profiler_sleep; | |
| 68 event_.TimedWait(delay); | |
| 69 } | |
| 70 } else { | |
| 71 // It looks like delayed_work_time_ indicates a time in the past, so we | |
| 72 // need to call DoDelayedWork now. | |
| 73 delayed_work_time_ = TimeTicks(); | |
| 74 } | |
| 75 } | |
| 76 // Since event_ is auto-reset, we don't need to do anything special here | |
| 77 // other than service each delegate method. | |
| 78 } | |
| 79 | |
| 80 keep_running_ = true; | |
| 81 } | |
| 82 | |
| 83 void MessagePumpDefault::Quit() { | |
| 84 keep_running_ = false; | |
| 85 } | |
| 86 | |
| 87 void MessagePumpDefault::ScheduleWork() { | |
| 88 // Since this can be called on any thread, we need to ensure that our Run | |
| 89 // loop wakes up. | |
| 90 event_.Signal(); | |
| 91 } | |
| 92 | |
| 93 void MessagePumpDefault::ScheduleDelayedWork( | |
| 94 const TimeTicks& delayed_work_time) { | |
| 95 // We know that we can't be blocked on Wait right now since this method can | |
| 96 // only be called on the same thread as Run, so we only need to update our | |
| 97 // record of how long to sleep when we do sleep. | |
| 98 delayed_work_time_ = delayed_work_time; | |
| 99 } | |
| 100 | |
| 101 } // namespace base |
