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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/message_loop/message_pump_default.h" | 5 #include "base/message_loop/message_pump_default.h" |
6 | 6 |
7 #include <algorithm> | |
8 | |
9 #include "base/logging.h" | 7 #include "base/logging.h" |
10 #include "base/threading/thread_restrictions.h" | 8 #include "base/threading/thread_restrictions.h" |
11 | 9 |
12 #if defined(OS_MACOSX) | 10 #if defined(OS_MACOSX) |
13 #include "base/mac/scoped_nsautorelease_pool.h" | 11 #include "base/mac/scoped_nsautorelease_pool.h" |
14 #endif | 12 #endif |
15 | 13 |
16 namespace base { | 14 namespace base { |
17 | 15 |
18 MessagePumpDefault::MessagePumpDefault() | 16 MessagePumpDefault::MessagePumpDefault() |
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47 break; | 45 break; |
48 | 46 |
49 if (did_work) | 47 if (did_work) |
50 continue; | 48 continue; |
51 | 49 |
52 ThreadRestrictions::ScopedAllowWait allow_wait; | 50 ThreadRestrictions::ScopedAllowWait allow_wait; |
53 if (delayed_work_time_.is_null()) { | 51 if (delayed_work_time_.is_null()) { |
54 event_.Wait(); | 52 event_.Wait(); |
55 } else { | 53 } else { |
56 TimeDelta delay = delayed_work_time_ - TimeTicks::Now(); | 54 TimeDelta delay = delayed_work_time_ - TimeTicks::Now(); |
57 #if defined(OS_WIN) | |
58 // If the delay is greater than zero and under 1 ms we need to round up to | |
59 // 1 ms or else we will end up spinning until it counts down to zero | |
60 // because sub-ms waits aren't supported on Windows. | |
61 if (delay > TimeDelta()) | |
62 delay = std::max(delay, TimeDelta::FromMilliseconds(1)); | |
63 #endif | |
64 if (delay > TimeDelta()) { | 55 if (delay > TimeDelta()) { |
65 event_.TimedWait(delay); | 56 event_.TimedWait(delay); |
66 } else { | 57 } else { |
67 // It looks like delayed_work_time_ indicates a time in the past, so we | 58 // It looks like delayed_work_time_ indicates a time in the past, so we |
68 // need to call DoDelayedWork now. | 59 // need to call DoDelayedWork now. |
69 delayed_work_time_ = TimeTicks(); | 60 delayed_work_time_ = TimeTicks(); |
70 } | 61 } |
71 } | 62 } |
72 // Since event_ is auto-reset, we don't need to do anything special here | 63 // Since event_ is auto-reset, we don't need to do anything special here |
73 // other than service each delegate method. | 64 // other than service each delegate method. |
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88 | 79 |
89 void MessagePumpDefault::ScheduleDelayedWork( | 80 void MessagePumpDefault::ScheduleDelayedWork( |
90 const TimeTicks& delayed_work_time) { | 81 const TimeTicks& delayed_work_time) { |
91 // We know that we can't be blocked on Wait right now since this method can | 82 // We know that we can't be blocked on Wait right now since this method can |
92 // only be called on the same thread as Run, so we only need to update our | 83 // only be called on the same thread as Run, so we only need to update our |
93 // record of how long to sleep when we do sleep. | 84 // record of how long to sleep when we do sleep. |
94 delayed_work_time_ = delayed_work_time; | 85 delayed_work_time_ = delayed_work_time; |
95 } | 86 } |
96 | 87 |
97 } // namespace base | 88 } // namespace base |
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