TimerThread.cpp

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00001 /*
00002 // $Id: //open/dev/fennel/synch/TimerThread.cpp#10 $
00003 // Fennel is a library of data storage and processing components.
00004 // Copyright (C) 2005-2009 The Eigenbase Project
00005 // Copyright (C) 2005-2009 SQLstream, Inc.
00006 // Copyright (C) 2005-2009 LucidEra, Inc.
00007 // Portions Copyright (C) 1999-2009 John V. Sichi
00008 //
00009 // This program is free software; you can redistribute it and/or modify it
00010 // under the terms of the GNU General Public License as published by the Free
00011 // Software Foundation; either version 2 of the License, or (at your option)
00012 // any later version approved by The Eigenbase Project.
00013 //
00014 // This program is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017 // GNU General Public License for more details.
00018 //
00019 // You should have received a copy of the GNU General Public License
00020 // along with this program; if not, write to the Free Software
00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 */
00023 
00024 #include "fennel/common/CommonPreamble.h"
00025 #include "fennel/synch/TimerThread.h"
00026 
00027 FENNEL_BEGIN_CPPFILE("$Id: //open/dev/fennel/synch/TimerThread.cpp#10 $");
00028 
00029 TimerThread::TimerThread(
00030     TimerThreadClient &clientInit)
00031     : Thread("TimerThread"),
00032       client(clientInit)
00033 {
00034     bStop = false;
00035 }
00036 
00037 void TimerThread::run()
00038 {
00039     // TODO jvs 13-Oct-2006:  resource acquisition as initialization
00040     client.onThreadStart();
00041     try {
00042         for (;;) {
00043             uint millis = client.getTimerIntervalMillis();
00044             if (!millis) {
00045                 break;
00046             }
00047             boost::xtime atv;
00048             convertTimeout(millis,atv);
00049             StrictMutexGuard mutexGuard(mutex);
00050             while (!bStop) {
00051                 if (!condition.timed_wait(mutexGuard,atv)) {
00052                     break;
00053                 }
00054             }
00055             if (bStop) {
00056                 break;
00057             }
00058             client.onTimerInterval();
00059         }
00060     } catch (...) {
00061         client.onThreadEnd();
00062         throw;
00063     }
00064     client.onThreadEnd();
00065 }
00066 
00067 void TimerThread::stop()
00068 {
00069     StrictMutexGuard mutexGuard(mutex);
00070     if (bStop || !isStarted()) {
00071         return;
00072     }
00073     bStop = true;
00074     condition.notify_all();
00075     mutexGuard.unlock();
00076     join();
00077     mutexGuard.lock();
00078     bStop = false;
00079 }
00080 
00081 void TimerThread::signalImmediate()
00082 {
00083     StrictMutexGuard mutexGuard(mutex);
00084     condition.notify_all();
00085 }
00086 
00087 TimerThreadClient::~TimerThreadClient()
00088 {
00089 }
00090 
00091 FENNEL_END_CPPFILE("$Id: //open/dev/fennel/synch/TimerThread.cpp#10 $");
00092 
00093 // End TimerThread.cpp

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