ThreadCounter.cpp

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* Copyright (C) 2006, Novell, Inc. All rights reserved.
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#include "blocxx/BLOCXX_config.h"
#include "blocxx/ThreadCounter.hpp"
#include "blocxx/NonRecursiveMutexLock.hpp"
#include "blocxx/Assertion.hpp"
#include "blocxx/TimeoutException.hpp"
#include "blocxx/Timeout.hpp"
 
namespace BLOCXX_NAMESPACE
{
 
ThreadCounter::ThreadCounter(Int32 maxThreads)
   : m_maxThreads(maxThreads)
   , m_runCount(0)
{}
ThreadCounter::~ThreadCounter()
{}
void
ThreadCounter::incThreadCount(UInt32 sTimeout, UInt32 usTimeout)
{
   incThreadCount(Timeout::relative(sTimeout + static_cast<float>(usTimeout) * 1000000.0));
}
void
ThreadCounter::incThreadCount(const Timeout& timeout)
{
   NonRecursiveMutexLock l(m_runCountGuard);
   while (m_runCount >= m_maxThreads)
   {
      if (!m_runCountCondition.timedWait(l, timeout))
      {
         BLOCXX_THROW(TimeoutException, "ThreadCounter::incThreadCount timedout");
      }
   }
   ++m_runCount;
}
void
ThreadCounter::decThreadCount()
{
   NonRecursiveMutexLock l(m_runCountGuard);
   BLOCXX_ASSERT(m_runCount > 0);
   --m_runCount;
   m_runCountCondition.notifyAll();
}
Int32
ThreadCounter::getThreadCount()
{
   NonRecursiveMutexLock l(m_runCountGuard);
   return m_runCount;
}
void
ThreadCounter::waitForAll(UInt32 sTimeout, UInt32 usTimeout)
{
   waitForAll(Timeout::relative(sTimeout + static_cast<float>(usTimeout) * 1000000.0));
}
 
void
ThreadCounter::waitForAll(const Timeout& timeout)
{
   NonRecursiveMutexLock runCountLock(m_runCountGuard);
   while (m_runCount > 0)
   {
      if (!m_runCountCondition.timedWait(runCountLock, timeout))
      {
         BLOCXX_THROW(TimeoutException, "ThreadCounter::waitForAll timedout");
      }
   }
}
void
ThreadCounter::setMax(Int32 maxThreads)
{
   NonRecursiveMutexLock runCountLock(m_runCountGuard);
   m_maxThreads = maxThreads;
   m_runCountCondition.notifyAll();
}
ThreadCountDecrementer::ThreadCountDecrementer(ThreadCounterRef const& x)
   : m_counter(x)
{}
ThreadCountDecrementer::~ThreadCountDecrementer()
{}
void
ThreadCountDecrementer::doNotifyThreadDone(Thread *)
{
   m_counter->decThreadCount();
}
 
} // end namespace BLOCXX_NAMESPACE