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semaphore.cc

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//**************************************************************************
#include "semaphore.h"
//**************************************************************************
Semaphore::Semaphore()
{
pthread_mutex_init(&mutex, NULL);
waitcount = postcount = 0;
}
//**************************************************************************
Semaphore::~Semaphore()
{
pthread_mutex_destroy(&mutex);
}
//**************************************************************************
bool Semaphore::isBusy()
{
int flag = false;
int err = pthread_mutex_trylock(&mutex);
if (err == EBUSY) flag = true;

if (!err) Post();

return flag;
}
//**************************************************************************
int Semaphore::Wait()
{
++waitcount;
pthread_mutex_lock(&mutex);
return 0;
}
//**************************************************************************
int Semaphore::Post()
{
++postcount;
pthread_mutex_unlock(&mutex);
return 0;
}
//**************************************************************************
int Semaphore::WaitCount()
{
return waitcount;
}
//**************************************************************************
int Semaphore::PostCount()
{
return postcount;
}
//**************************************************************************

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