/*
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * 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
 *
 * For a license to use the Kamailio software under conditions
 * other than those described here, or to purchase support for this
 * software, please contact iptel.org by e-mail at the following addresses:
 *    info@iptel.org
 *
 * 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
 */

/*!
* \file
* \brief Kamailio core :: Kamailio locking library
* \author andrei
* \ingroup core
* Module: \ref core
*
 *   WARNING: don't include this directly include instead locking.h!
 *
Implements: (see also locking.h)

	simple locks:
	-------------
	gen_lock_t* lock_alloc();                - allocates a lock in shared mem.
	void    lock_dealloc(gen_lock_t* lock);  - deallocates the lock's shared m.

	lock sets: [implemented only for FL & SYSV so far]
	----------
	gen_lock_set_t* lock_set_alloc(no)               - allocs a lock set in shm.
	void lock_set_dealloc(gen_lock_set_t* s);        - deallocs the lock set shm.

*/

#ifndef _lock_alloc_h
#define _lock_alloc_h

/*shm_{malloc, free}*/
#include "mem/mem.h"
#include "mem/shm_mem.h"

#if defined(FAST_LOCK) || defined(USE_PTHREAD_MUTEX) || defined(USE_POSIX_SEM)
/* simple locks*/
#define lock_alloc() shm_malloc(sizeof(gen_lock_t))
#define lock_dealloc(lock) shm_free((void *)lock)
/* lock sets */

inline static gen_lock_set_t *lock_set_alloc(int n)
{
	gen_lock_set_t *ls;
	ls = (gen_lock_set_t *)shm_malloc(
			sizeof(gen_lock_set_t) + n * sizeof(gen_lock_t));
	if(ls == 0) {
		SHM_MEM_CRITICAL;
	} else {
		ls->locks = (gen_lock_t *)((char *)ls + sizeof(gen_lock_set_t));
		ls->size = n;
	}
	return ls;
}

#define lock_set_dealloc(lock_set) shm_free((void *)lock_set)

#elif defined USE_SYSV_SEM

/*simple locks*/
#define lock_alloc() shm_malloc(sizeof(gen_lock_t))
#define lock_dealloc(lock) shm_free((void *)lock)
/* lock sets */

inline static gen_lock_set_t *lock_set_alloc(int n)
{
	gen_lock_set_t *ls;
	ls = (gen_lock_set_t *)shm_malloc(sizeof(gen_lock_set_t));
	if(ls == 0) {
		SHM_MEM_CRITICAL;
	} else {
		ls->size = n;
		ls->semid = -1;
	}
	return ls;
}


#define lock_set_dealloc(lock_set) shm_free((void *)lock_set)


#else
#error "no locking method selected"
#endif


#endif
