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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 "chrome/common/worker_thread_ticker.h" | 5 #include "chrome/common/worker_thread_ticker.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 | 8 |
| 9 #include "base/logging.h" | 9 #include "base/logging.h" |
| 10 #include "base/message_loop.h" | 10 #include "base/message_loop.h" |
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| 37 is_running_(false), | 37 is_running_(false), |
| 38 tick_interval_(tick_interval) { | 38 tick_interval_(tick_interval) { |
| 39 } | 39 } |
| 40 | 40 |
| 41 WorkerThreadTicker::~WorkerThreadTicker() { | 41 WorkerThreadTicker::~WorkerThreadTicker() { |
| 42 Stop(); | 42 Stop(); |
| 43 } | 43 } |
| 44 | 44 |
| 45 bool WorkerThreadTicker::RegisterTickHandler(Callback *tick_handler) { | 45 bool WorkerThreadTicker::RegisterTickHandler(Callback *tick_handler) { |
| 46 DCHECK(tick_handler); | 46 DCHECK(tick_handler); |
| 47 AutoLock lock(lock_); | 47 base::AutoLock lock(lock_); |
| 48 // You cannot change the list of handlers when the timer is running. | 48 // You cannot change the list of handlers when the timer is running. |
| 49 // You need to call Stop first. | 49 // You need to call Stop first. |
| 50 if (IsRunning()) | 50 if (IsRunning()) |
| 51 return false; | 51 return false; |
| 52 tick_handler_list_.push_back(tick_handler); | 52 tick_handler_list_.push_back(tick_handler); |
| 53 return true; | 53 return true; |
| 54 } | 54 } |
| 55 | 55 |
| 56 bool WorkerThreadTicker::UnregisterTickHandler(Callback *tick_handler) { | 56 bool WorkerThreadTicker::UnregisterTickHandler(Callback *tick_handler) { |
| 57 DCHECK(tick_handler); | 57 DCHECK(tick_handler); |
| 58 AutoLock lock(lock_); | 58 base::AutoLock lock(lock_); |
| 59 // You cannot change the list of handlers when the timer is running. | 59 // You cannot change the list of handlers when the timer is running. |
| 60 // You need to call Stop first. | 60 // You need to call Stop first. |
| 61 if (IsRunning()) { | 61 if (IsRunning()) { |
| 62 return false; | 62 return false; |
| 63 } | 63 } |
| 64 TickHandlerListType::iterator index = std::remove(tick_handler_list_.begin(), | 64 TickHandlerListType::iterator index = std::remove(tick_handler_list_.begin(), |
| 65 tick_handler_list_.end(), | 65 tick_handler_list_.end(), |
| 66 tick_handler); | 66 tick_handler); |
| 67 if (index == tick_handler_list_.end()) { | 67 if (index == tick_handler_list_.end()) { |
| 68 return false; | 68 return false; |
| 69 } | 69 } |
| 70 tick_handler_list_.erase(index, tick_handler_list_.end()); | 70 tick_handler_list_.erase(index, tick_handler_list_.end()); |
| 71 return true; | 71 return true; |
| 72 } | 72 } |
| 73 | 73 |
| 74 bool WorkerThreadTicker::Start() { | 74 bool WorkerThreadTicker::Start() { |
| 75 // Do this in a lock because we don't want 2 threads to | 75 // Do this in a lock because we don't want 2 threads to |
| 76 // call Start at the same time | 76 // call Start at the same time |
| 77 AutoLock lock(lock_); | 77 base::AutoLock lock(lock_); |
| 78 if (IsRunning()) | 78 if (IsRunning()) |
| 79 return false; | 79 return false; |
| 80 if (!timer_thread_.Start()) | 80 if (!timer_thread_.Start()) |
| 81 return false; | 81 return false; |
| 82 is_running_ = true; | 82 is_running_ = true; |
| 83 ScheduleTimerTask(); | 83 ScheduleTimerTask(); |
| 84 return true; | 84 return true; |
| 85 } | 85 } |
| 86 | 86 |
| 87 bool WorkerThreadTicker::Stop() { | 87 bool WorkerThreadTicker::Stop() { |
| 88 // Do this in a lock because we don't want 2 threads to | 88 // Do this in a lock because we don't want 2 threads to |
| 89 // call Stop at the same time | 89 // call Stop at the same time |
| 90 AutoLock lock(lock_); | 90 base::AutoLock lock(lock_); |
| 91 if (!IsRunning()) | 91 if (!IsRunning()) |
| 92 return false; | 92 return false; |
| 93 is_running_ = false; | 93 is_running_ = false; |
| 94 timer_thread_.Stop(); | 94 timer_thread_.Stop(); |
| 95 return true; | 95 return true; |
| 96 } | 96 } |
| 97 | 97 |
| 98 void WorkerThreadTicker::ScheduleTimerTask() { | 98 void WorkerThreadTicker::ScheduleTimerTask() { |
| 99 timer_thread_.message_loop()->PostDelayedTask(FROM_HERE, new TimerTask(this), | 99 timer_thread_.message_loop()->PostDelayedTask(FROM_HERE, new TimerTask(this), |
| 100 tick_interval_); | 100 tick_interval_); |
| 101 } | 101 } |
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