ThreadCounter.cpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2004 Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2005 Novell, Inc. All rights reserved.
00004 *
00005 * Redistribution and use in source and binary forms, with or without
00006 * modification, are permitted provided that the following conditions are met:
00007 *
00008 *  - Redistributions of source code must retain the above copyright notice,
00009 *    this list of conditions and the following disclaimer.
00010 *
00011 *  - Redistributions in binary form must reproduce the above copyright notice,
00012 *    this list of conditions and the following disclaimer in the documentation
00013 *    and/or other materials provided with the distribution.
00014 *
00015 *  - Neither the name of Vintela, Inc., Novell, Inc., nor the names of its
00016 *    contributors may be used to endorse or promote products derived from this
00017 *    software without specific prior written permission.
00018 *
00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022 * ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc., Novell, Inc., OR THE 
00023 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
00024 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
00025 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
00026 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
00027 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
00028 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
00029 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030 *******************************************************************************/
00031 
00032 
00037 #include "blocxx/BLOCXX_config.h"
00038 #include "blocxx/ThreadCounter.hpp"
00039 #include "blocxx/NonRecursiveMutexLock.hpp"
00040 #include "blocxx/Assertion.hpp"
00041 #include "blocxx/TimeoutException.hpp"
00042 
00043 namespace BLOCXX_NAMESPACE
00044 {
00045 
00046 ThreadCounter::ThreadCounter(Int32 maxThreads)
00047    : m_maxThreads(maxThreads)
00048    , m_runCount(0)
00049 {}
00050 ThreadCounter::~ThreadCounter()
00051 {}
00052 void
00053 ThreadCounter::incThreadCount(UInt32 sTimeout, UInt32 usTimeout)
00054 {
00055    NonRecursiveMutexLock l(m_runCountGuard);
00056    while (m_runCount >= m_maxThreads)
00057    {
00058       if (!m_runCountCondition.timedWait(l, sTimeout, usTimeout))
00059       {
00060          BLOCXX_THROW(TimeoutException, "ThreadCounter::incThreadCount timedout");
00061       }
00062    }
00063    ++m_runCount;
00064 }
00065 void
00066 ThreadCounter::decThreadCount()
00067 {
00068    NonRecursiveMutexLock l(m_runCountGuard);
00069    BLOCXX_ASSERT(m_runCount > 0);
00070    --m_runCount;
00071    m_runCountCondition.notifyAll();
00072 }
00073 Int32
00074 ThreadCounter::getThreadCount()
00075 {
00076    NonRecursiveMutexLock l(m_runCountGuard);
00077    return m_runCount;
00078 }
00079 void
00080 ThreadCounter::waitForAll(UInt32 sTimeout, UInt32 usTimeout)
00081 {
00082    NonRecursiveMutexLock runCountLock(m_runCountGuard);
00083    while (m_runCount > 0)
00084    {
00085       if (!m_runCountCondition.timedWait(runCountLock, sTimeout, usTimeout))
00086       {
00087          BLOCXX_THROW(TimeoutException, "ThreadCounter::waitForAll timedout");
00088       }
00089    }
00090 }
00091 void
00092 ThreadCounter::setMax(Int32 maxThreads)
00093 {
00094    NonRecursiveMutexLock runCountLock(m_runCountGuard);
00095    m_maxThreads = maxThreads;
00096    m_runCountCondition.notifyAll();
00097 }
00098 ThreadCountDecrementer::ThreadCountDecrementer(ThreadCounterRef const& x)
00099    : m_counter(x)
00100 {}
00101 ThreadCountDecrementer::~ThreadCountDecrementer()
00102 {}
00103 void
00104 ThreadCountDecrementer::doNotifyThreadDone(Thread *)
00105 {
00106    m_counter->decThreadCount();
00107 }
00108 
00109 } // end namespace BLOCXX_NAMESPACE
00110 

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