lockable.hh

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/* Copyright (C) 2005, SWECO, All Rights Reserved.

   Definition of the lockable property of a class

   $Id$

   Author: Zsolt Molnar ([e-mail])
   ---------------------------------------------------------------------------*/

#ifndef __LOCKABLE_HH__
#define __LOCKABLE_HH__

#include <pthread.h>
#include <errno.h>
#include "base.hh"

#ifdef _cplusplus
extern "C" {
#endif

class Lockable {
protected:

	Lockable() {pthread_mutex_init(&_mutex, NULL);};
	~Lockable() {pthread_mutex_destroy(&_mutex);};

public:
	
	void lock() {pthread_mutex_lock(&_mutex);};
	void unlock() {pthread_mutex_unlock(&_mutex);};;
	bool isLocked();
	
private:

	pthread_mutex_t _mutex;
};


inline bool
Lockable::isLocked()
{
	int res = pthread_mutex_trylock(&_mutex);

	if (res == EBUSY) {
		return true;
	} else {
		pthread_mutex_unlock(&_mutex);
	}

	return false;	
}

#ifdef _cplusplus
}
#endif


#endif // #ifndef __LOCKABLE_HH__