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112 lines
3.1 KiB
112 lines
3.1 KiB
/* $Id$ */
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/*
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*
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* Copyright (C) 2001-2003 FhG Fokus
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*
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* This file is part of ser, a free SIP server.
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*
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* ser is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* For a license to use the ser software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* ser is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* ser locking library
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* WARNING: don't include this directly include instead locking.h!
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* History:
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* --------
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* 2003-03-06 created by andrei (contains parts of the original locking.h)
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* 2003-03-17 fixed cast warning in shm_free (forced to void*) (andrei)
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* 2004-07-28 s/lock_set_t/gen_lock_set_t/ because of a type conflict
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* on darwin (andrei)
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*
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Implements: (see also locking.h)
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simple locks:
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-------------
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gen_lock_t* lock_alloc(); - allocates a lock in shared mem.
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void lock_dealloc(gen_lock_t* lock); - deallocates the lock's shared m.
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lock sets: [implemented only for FL & SYSV so far]
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----------
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gen_lock_set_t* lock_set_alloc(no) - allocs a lock set in shm.
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void lock_set_dealloc(gen_lock_set_t* s); - deallocs the lock set shm.
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*/
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#ifndef _lock_alloc_h
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#define _lock_alloc_h
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/*shm_{malloc, free}*/
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#include "mem/mem.h"
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#ifdef SHM_MEM
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#include "mem/shm_mem.h"
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#else
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#error "locking requires shared memory support"
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#endif
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#if defined(FAST_LOCK) || defined(USE_PTHREAD_MUTEX) || defined(USE_POSIX_SEM)
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/* simple locks*/
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#define lock_alloc() shm_malloc(sizeof(gen_lock_t))
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#define lock_dealloc(lock) shm_free((void*)lock)
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/* lock sets */
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inline static gen_lock_set_t* lock_set_alloc(int n)
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{
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gen_lock_set_t* ls;
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ls=(gen_lock_set_t*)shm_malloc(sizeof(gen_lock_set_t)+n*sizeof(gen_lock_t));
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if (ls==0){
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LOG(L_CRIT, "ERROR: lock_set_alloc (FL): could not allocate lock_set\n");
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}else{
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ls->locks=(gen_lock_t*)((char*)ls+sizeof(gen_lock_set_t));
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ls->size=n;
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}
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return ls;
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}
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#define lock_set_dealloc(lock_set) shm_free((void*)lock_set)
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#elif defined USE_SYSV_SEM
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/*simple locks*/
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#define lock_alloc() shm_malloc(sizeof(gen_lock_t))
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#define lock_dealloc(lock) shm_free((void*)lock)
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/* lock sets */
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inline static gen_lock_set_t* lock_set_alloc(int n)
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{
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gen_lock_set_t* ls;
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ls=(gen_lock_set_t*)shm_malloc(sizeof(gen_lock_set_t));
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if (ls){
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ls->size=n;
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ls->semid=-1;
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};
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return ls;
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}
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#define lock_set_dealloc(lock_set) shm_free((void*)lock_set)
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#else
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#error "no locking method selected"
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#endif
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#endif
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