mmentovai@google.com | aa13be6 | 2008-09-03 03:20:34 +0900 | [diff] [blame] | 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" |
mark@chromium.org | 3b2ec6f | 2008-09-26 05:33:42 +0900 | [diff] [blame] | 8 | #include "base/scoped_nsautorelease_pool.h" |
mmentovai@google.com | aa13be6 | 2008-09-03 03:20:34 +0900 | [diff] [blame] | 9 | |
| 10 | namespace base { |
| 11 | |
| 12 | MessagePumpDefault::MessagePumpDefault() |
| 13 | : keep_running_(true), |
| 14 | event_(false, false) { |
| 15 | } |
| 16 | |
| 17 | void MessagePumpDefault::Run(Delegate* delegate) { |
| 18 | DCHECK(keep_running_) << "Quit must have been called outside of Run!"; |
| 19 | |
| 20 | for (;;) { |
mark@chromium.org | 3b2ec6f | 2008-09-26 05:33:42 +0900 | [diff] [blame] | 21 | ScopedNSAutoreleasePool autorelease_pool; |
| 22 | |
mmentovai@google.com | aa13be6 | 2008-09-03 03:20:34 +0900 | [diff] [blame] | 23 | bool did_work = delegate->DoWork(); |
| 24 | if (!keep_running_) |
| 25 | break; |
| 26 | |
| 27 | did_work |= delegate->DoDelayedWork(&delayed_work_time_); |
| 28 | if (!keep_running_) |
| 29 | break; |
| 30 | |
| 31 | if (did_work) |
| 32 | continue; |
| 33 | |
| 34 | did_work = delegate->DoIdleWork(); |
| 35 | if (!keep_running_) |
| 36 | break; |
| 37 | |
| 38 | if (did_work) |
| 39 | continue; |
| 40 | |
| 41 | if (delayed_work_time_.is_null()) { |
| 42 | event_.Wait(); |
| 43 | } else { |
| 44 | TimeDelta delay = delayed_work_time_ - Time::Now(); |
| 45 | if (delay > TimeDelta()) { |
| 46 | event_.TimedWait(delay); |
| 47 | } else { |
| 48 | // It looks like delayed_work_time_ indicates a time in the past, so we |
| 49 | // need to call DoDelayedWork now. |
| 50 | delayed_work_time_ = Time(); |
| 51 | } |
| 52 | } |
| 53 | // Since event_ is auto-reset, we don't need to do anything special here |
| 54 | // other than service each delegate method. |
| 55 | } |
| 56 | |
| 57 | keep_running_ = true; |
| 58 | } |
| 59 | |
| 60 | void MessagePumpDefault::Quit() { |
| 61 | keep_running_ = false; |
| 62 | } |
| 63 | |
| 64 | void MessagePumpDefault::ScheduleWork() { |
| 65 | // Since this can be called on any thread, we need to ensure that our Run |
| 66 | // loop wakes up. |
| 67 | event_.Signal(); |
| 68 | } |
| 69 | |
| 70 | void MessagePumpDefault::ScheduleDelayedWork(const Time& delayed_work_time) { |
| 71 | // We know that we can't be blocked on Wait right now since this method can |
| 72 | // only be called on the same thread as Run, so we only need to update our |
| 73 | // record of how long to sleep when we do sleep. |
| 74 | delayed_work_time_ = delayed_work_time; |
| 75 | } |
| 76 | |
| 77 | } // namespace base |