TimerThread.cpp

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/*
// $Id: //open/dev/fennel/synch/TimerThread.cpp#10 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2005-2009 The Eigenbase Project
// Copyright (C) 2005-2009 SQLstream, Inc.
// Copyright (C) 2005-2009 LucidEra, Inc.
// Portions Copyright (C) 1999-2009 John V. Sichi
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 of the License, or (at your option)
// any later version approved by The Eigenbase Project.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "fennel/common/CommonPreamble.h"
#include "fennel/synch/TimerThread.h"

FENNEL_BEGIN_CPPFILE("$Id: //open/dev/fennel/synch/TimerThread.cpp#10 $");

TimerThread::TimerThread(
    TimerThreadClient &clientInit)
    : Thread("TimerThread"),
      client(clientInit)
{
    bStop = false;
}

void TimerThread::run()
{
    // TODO jvs 13-Oct-2006:  resource acquisition as initialization
    client.onThreadStart();
    try {
        for (;;) {
            uint millis = client.getTimerIntervalMillis();
            if (!millis) {
                break;
            }
            boost::xtime atv;
            convertTimeout(millis,atv);
            StrictMutexGuard mutexGuard(mutex);
            while (!bStop) {
                if (!condition.timed_wait(mutexGuard,atv)) {
                    break;
                }
            }
            if (bStop) {
                break;
            }
            client.onTimerInterval();
        }
    } catch (...) {
        client.onThreadEnd();
        throw;
    }
    client.onThreadEnd();
}

void TimerThread::stop()
{
    StrictMutexGuard mutexGuard(mutex);
    if (bStop || !isStarted()) {
        return;
    }
    bStop = true;
    condition.notify_all();
    mutexGuard.unlock();
    join();
    mutexGuard.lock();
    bStop = false;
}

void TimerThread::signalImmediate()
{
    StrictMutexGuard mutexGuard(mutex);
    condition.notify_all();
}

TimerThreadClient::~TimerThreadClient()
{
}

FENNEL_END_CPPFILE("$Id: //open/dev/fennel/synch/TimerThread.cpp#10 $");

// End TimerThread.cpp

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