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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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/incoming_task_queue.h" | 5 #include "base/message_loop/incoming_task_queue.h" |
| 6 | 6 |
| 7 #include <limits> | 7 #include <limits> |
| 8 | 8 |
| 9 #include "base/location.h" | 9 #include "base/location.h" |
| 10 #include "base/message_loop/message_loop.h" | 10 #include "base/message_loop/message_loop.h" |
| 11 #include "base/metrics/histogram.h" | 11 #include "base/metrics/histogram.h" |
| 12 #include "base/synchronization/waitable_event.h" | 12 #include "base/synchronization/waitable_event.h" |
| 13 #include "base/time/time.h" | 13 #include "base/time/time.h" |
| 14 | 14 |
| 15 namespace base { | 15 namespace base { |
| 16 namespace internal { | 16 namespace internal { |
| 17 | 17 |
| 18 namespace { | 18 namespace { |
| 19 | 19 |
| 20 // Delays larger than this many microseconds are often bogus, and a warning | 20 #ifndef NDEBUG |
| 21 // should be emitted in debug builds to warn developers. | 21 // Delays larger than this are often bogus, and a warning should be emitted in |
| 22 // http://crbug.com/450045 | 22 // debug builds to warn developers. http://crbug.com/450045 |
| 23 const int kTaskDelayWarningThresholdInMicroseconds = | 23 const int kTaskDelayWarningThresholdInSeconds = |
| 24 std::numeric_limits<int>::max() / 2; // A little less than 18 minutes. | 24 14 * 24 * 60 * 60; // 14 days. |
| 25 #endif |
| 25 | 26 |
| 26 // Returns true if MessagePump::ScheduleWork() must be called one | 27 // Returns true if MessagePump::ScheduleWork() must be called one |
| 27 // time for every task that is added to the MessageLoop incoming queue. | 28 // time for every task that is added to the MessageLoop incoming queue. |
| 28 bool AlwaysNotifyPump(MessageLoop::Type type) { | 29 bool AlwaysNotifyPump(MessageLoop::Type type) { |
| 29 #if defined(OS_ANDROID) | 30 #if defined(OS_ANDROID) |
| 30 // The Android UI message loop needs to get notified each time a task is | 31 // The Android UI message loop needs to get notified each time a task is |
| 31 // added | 32 // added |
| 32 // to the incoming queue. | 33 // to the incoming queue. |
| 33 return type == MessageLoop::TYPE_UI || type == MessageLoop::TYPE_JAVA; | 34 return type == MessageLoop::TYPE_UI || type == MessageLoop::TYPE_JAVA; |
| 34 #else | 35 #else |
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| 45 message_loop_scheduled_(false), | 46 message_loop_scheduled_(false), |
| 46 always_schedule_work_(AlwaysNotifyPump(message_loop_->type())) { | 47 always_schedule_work_(AlwaysNotifyPump(message_loop_->type())) { |
| 47 } | 48 } |
| 48 | 49 |
| 49 bool IncomingTaskQueue::AddToIncomingQueue( | 50 bool IncomingTaskQueue::AddToIncomingQueue( |
| 50 const tracked_objects::Location& from_here, | 51 const tracked_objects::Location& from_here, |
| 51 const Closure& task, | 52 const Closure& task, |
| 52 TimeDelta delay, | 53 TimeDelta delay, |
| 53 bool nestable) { | 54 bool nestable) { |
| 54 DLOG_IF(WARNING, | 55 DLOG_IF(WARNING, |
| 55 delay.InMicroseconds() > kTaskDelayWarningThresholdInMicroseconds) | 56 delay.InSeconds() > kTaskDelayWarningThresholdInSeconds) |
| 56 << "Requesting super-long task delay period of " << delay.InMicroseconds() | 57 << "Requesting super-long task delay period of " << delay.InSeconds() |
| 57 << " usec from here: " << from_here.ToString(); | 58 << " seconds from here: " << from_here.ToString(); |
| 58 | 59 |
| 59 AutoLock locked(incoming_queue_lock_); | 60 AutoLock locked(incoming_queue_lock_); |
| 60 PendingTask pending_task( | 61 PendingTask pending_task( |
| 61 from_here, task, CalculateDelayedRuntime(delay), nestable); | 62 from_here, task, CalculateDelayedRuntime(delay), nestable); |
| 62 #if defined(OS_WIN) | 63 #if defined(OS_WIN) |
| 63 // We consider the task needs a high resolution timer if the delay is | 64 // We consider the task needs a high resolution timer if the delay is |
| 64 // more than 0 and less than 32ms. This caps the relative error to | 65 // more than 0 and less than 32ms. This caps the relative error to |
| 65 // less than 50% : a 33ms wait can wake at 48ms since the default | 66 // less than 50% : a 33ms wait can wake at 48ms since the default |
| 66 // resolution on Windows is between 10 and 15ms. | 67 // resolution on Windows is between 10 and 15ms. |
| 67 if (delay > TimeDelta() && | 68 if (delay > TimeDelta() && |
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| 156 // reload from the incoming queue before waiting again so we clear this flag | 157 // reload from the incoming queue before waiting again so we clear this flag |
| 157 // in ReloadWorkQueue(). | 158 // in ReloadWorkQueue(). |
| 158 message_loop_scheduled_ = true; | 159 message_loop_scheduled_ = true; |
| 159 } | 160 } |
| 160 | 161 |
| 161 return true; | 162 return true; |
| 162 } | 163 } |
| 163 | 164 |
| 164 } // namespace internal | 165 } // namespace internal |
| 165 } // namespace base | 166 } // namespace base |
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