#ifndef PIMUTEX_H
#define PIMUTEX_H

#include <pthread.h>
#include "piincludes.h"

class PIMutex
{
public:
	PIMutex() {
		pthread_mutexattr_t attr;
		pthread_mutexattr_init(&attr);
		pthread_mutexattr_settype(&attr, PTHREAD_PROCESS_SHARED);
		pthread_mutex_init(&mutex, &attr);
		pthread_mutexattr_destroy(&attr);
	}
	~PIMutex() {pthread_mutex_destroy(&mutex);}
	void lock() {pthread_mutex_lock(&mutex);}
	void unlock() {pthread_mutex_unlock(&mutex);}
	bool tryLock() {return (pthread_mutex_trylock(&mutex) == 0);}
	
private:
	pthread_mutex_t mutex;
	
};

class PIMutexLocker
{
public:
	PIMutexLocker(PIMutex * m): mutex(m) {mutex->lock();}
	PIMutexLocker(PIMutex & m): mutex(&m) {mutex->lock();}
	~PIMutexLocker() {mutex->unlock();}
private:
	PIMutex * mutex;
};

#endif // PIMUTEX_H