/*
 * Copyright (C) 2012 Smile Communications, jason.penton@smilecoms.com
 * Copyright (C) 2012 Smile Communications, richard.good@smilecoms.com
 *
 * The initial version of this code was written by Dragos Vingarzan
 * (dragos(dot)vingarzan(at)fokus(dot)fraunhofer(dot)de and the
 * Fruanhofer Institute. It was and still is maintained in a separate
 * branch of the original SER. We are therefore migrating it to
 * Kamailio/SR and look forward to maintaining it from here on out.
 * 2011/2012 Smile Communications, Pty. Ltd.
 * ported/maintained/improved by
 * Jason Penton (jason(dot)penton(at)smilecoms.com and
 * Richard Good (richard(dot)good(at)smilecoms.com) as part of an
 * effort to add full IMS support to Kamailio/SR using a new and
 * improved architecture
 *
 * NB: Alot of this code was originally part of OpenIMSCore,
 * FhG Fokus.
 * Copyright (C) 2004-2006 FhG Fokus
 * Thanks for great work! This is an effort to
 * break apart the various CSCF functions into logically separate
 * components. We hope this will drive wider use. We also feel
 * that in this way the architecture is more complete and thereby easier
 * to manage in the Kamailio/SR environment
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version
 *
 * Kamailio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef __SEM_H
#define __SEM_H

//	#include "../../core/mem/mem.h"
//	#include "../../core/mem/shm_mem.h"

#include "utils.h"

#include <semaphore.h>

typedef sem_t gen_sem_t;

/**
 * Create a new unnamed semaphore and initialize it
 * @param value - 0 if it should be pre-locked, 1 if not, or how many locks until block
 * @return
 */
#define sem_new(sem_ptr, value)                                                \
	do {                                                                       \
		sem_ptr = shm_malloc(sizeof(gen_sem_t));                               \
		if(!sem_ptr) {                                                         \
			LM_ERR("Error allocating %lx bytes of shm!\n", sizeof(gen_sem_t)); \
			goto out_of_memory;                                                \
		}                                                                      \
		if(sem_init(sem_ptr, 1, value) < 0) {                                  \
			LM_ERR("Error > %s\n", strerror(errno));                           \
			goto out_of_memory;                                                \
		}                                                                      \
	} while(0)

#define sem_free(sem)         \
	do {                      \
		if(sem) {             \
			sem_destroy(sem); \
			shm_free(sem);    \
			sem = 0;          \
		}                     \
	} while(0)


#define sem_get(sem) sem_wait(sem)
#define sem_tryget(sem) sem_trywait(sem)
#define sem_timedget(sem, abs_timeout) sem_trywait(sem, abs_timeout)

#define sem_release(sem) sem_post(sem)

#endif
