int Fun1( bufferIndex, expectedProgressState, newProgressState, timeoutTime)

{

boost::shmem::shared_timed_mutex::scoped_timed_lock lock( mutex, timeoutTime)

if (lock.locked() == true)

{

while ( mp_bufferIndex[bufferIndex].m_progressState != expectedProgressState)

{

if ( mp_bufferIndex[bufferIndex].m_bufferCondition.timed_wait( lock, timeoutTime) == false)

{

// Timed out on condition

return timedOut;

}

// Change the progress state

{

else

{

// mutex timed out

return timedOut;

}

return success;

}

I hope this makes sense. In this test, the value of the expectedProgressState is never true, in order to force the timeout. Basically I obtain the mutex before we even wait on the condition variable.