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/* $Id: lock_alloc.h,v 1.1.1.1 2005/06/13 16:47:27 bogdan_iancu Exp $
*
* ser locking library
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of openser, a free SIP server.
*
* openser 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
*
* openser 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* WARNING: don't include this directly include instead locking.h!
*
* History:
* --------
* 2003-03-06 created by andrei (contains parts of the original locking.h)
* 2003-03-17 fixed cast warning in shm_free (forced to void*) (andrei)
* 2004-07-28 s/lock_set_t/gen_lock_set_t/ because of a type conflict
* on darwin (andrei)
*
* 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"
#ifdef SHM_MEM
#include "mem/shm_mem.h"
#else
#error "locking requires shared memory support"
#endif
#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){
LOG(L_CRIT, "ERROR: lock_set_alloc (FL): could not allocate lock_set\n");
}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){
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
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