| // Copyright 2010-2015, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "base/timer.h" |
| |
| #include "base/logging.h" |
| #include "base/thread.h" |
| #include "base/unnamed_event.h" |
| #include "base/util.h" |
| |
| namespace mozc { |
| |
| class Timer::TimerThread : public Thread { |
| public: |
| TimerThread(uint32 due_time, uint32 interval, Timer *timer) |
| : Thread(), |
| due_time_(due_time), |
| interval_(interval), |
| timer_(timer), |
| event_(new UnnamedEvent) {} |
| |
| virtual ~TimerThread() { |
| SignalQuit(); |
| Join(); |
| } |
| |
| virtual void Run() { |
| if (event_->Wait(due_time_)) { |
| VLOG(1) << "Received notification event"; |
| return; |
| } |
| VLOG(2) << "call TimerCallback()"; |
| timer_->TimerCallback(); |
| |
| if (interval_ == 0) { |
| VLOG(2) << "Run() end"; |
| return; |
| } else { |
| while (true) { |
| if (event_->Wait(interval_)) { |
| VLOG(1) << "Received notification event"; |
| return; |
| } |
| VLOG(2) << "call TimerCallback()"; |
| timer_->TimerCallback(); |
| } |
| } |
| } |
| |
| void SignalQuit() { |
| const bool result = event_->Notify(); |
| DCHECK(result); |
| } |
| |
| private: |
| uint32 due_time_; |
| uint32 interval_; |
| Timer *timer_; |
| scoped_ptr<UnnamedEvent> event_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TimerThread); |
| }; |
| |
| void Timer::TimerCallback() { |
| num_signaled_++; |
| Signaled(); |
| } |
| |
| bool Timer::Start(uint32 due_time, uint32 interval) { |
| VLOG(1) << "Starting " << due_time << " " << interval; |
| // Note: We can simply destroy |*timer_thread_.get()| since |
| // TimerThread::~TimerThread internally joins its background thread. |
| timer_thread_.reset(new TimerThread(due_time, interval, this)); |
| timer_thread_->Start(); |
| return true; |
| } |
| |
| void Timer::Stop() { |
| // Note: We can simply destroy |*timer_thread_.get()| since |
| // TimerThread::~TimerThread internally joins its background thread. |
| timer_thread_.reset(NULL); |
| } |
| |
| Timer::Timer() |
| : num_signaled_(0) {} |
| |
| Timer::~Timer() { |
| Stop(); |
| } |
| |
| void Timer::Signaled() { |
| // Note: This code can be called back even if a subclass overrides this |
| // method when the main thread reached to Timer::~Timer. Do not make this |
| // method pure-virtual. |
| } |
| |
| } // namespace mozc |