| // 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. |
| |
| #ifndef MOZC_BASE_TIMER_H_ |
| #define MOZC_BASE_TIMER_H_ |
| |
| #include "base/port.h" |
| #include "base/scoped_ptr.h" |
| |
| namespace mozc { |
| |
| class Timer { |
| public: |
| // Start timer. |
| // due_time: |
| // The amount of time to elapse before the timer is to be set to the |
| // signaled state for the first time, in milliseconds. |
| // interval: |
| // The period of the timer, in milliseconds. If |interval| is zero, |
| // the timer is one-shot timer. If this parameter is greater than zero, |
| // the timer is periodic. |
| // |
| // Either due_time and interval must be non 0. |
| bool Start(uint32 due_time, uint32 interval); |
| |
| // Stop timer: |
| // If pending signal functions remain, Stop() blocks the current thread |
| // Be sure that signal handler never be blocked. |
| void Stop(); |
| |
| Timer(); |
| |
| // Timer() call Stop() internally, so it is blocking |
| virtual ~Timer(); |
| |
| void TimerCallback(); |
| |
| protected: |
| // overwrite this function to implement signal handler. |
| // Caveat: Even if you overrides this methods, the timer stop calling back |
| // the overridden version once the object destruction reached to |
| // Timer::~Timer(). This is because the callback is internally implemented |
| // as |this->Signaled()| but the vtable dynamically changes during |
| // object construction and destruction. This also means you cannot make |
| // this method pure-virtual, because this method can be called back when |
| // the main thread is running inside Timer::~Timer() |
| // TODO(yukawa): Switch to more robust design. |
| virtual void Signaled(); |
| |
| private: |
| class TimerThread; |
| scoped_ptr<TimerThread> timer_thread_; |
| uint32 num_signaled_; |
| |
| DISALLOW_COPY_AND_ASSIGN(Timer); |
| }; |
| |
| } // namespace mozc |
| #endif // MOZC_BASE_TIMER_H_ |