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74 lines
2.7 KiB
74 lines
2.7 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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*
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* 2002-12-16 created by andrei
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* 2003-02-20 s/gen_lock_t/gen_lock_t/ to avoid a type conflict
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* on solaris (andrei)
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* 2003-03-05 lock set support added for FAST_LOCK & SYSV (andrei)
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* 2003-03-06 split in two: lock_ops.h & lock_alloc.h, to avoid
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* shm_mem.h<->locking.h interdependency (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 (in lock_ops.h & lock_alloc.h):
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simple locks:
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-------------
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type: gen_lock_t
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gen_lock_t* lock_alloc(); - allocates a lock in shared mem.
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gen_lock_t* lock_init(gen_lock_t* lock); - inits the lock
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void lock_destroy(gen_lock_t* lock); - removes the lock (e.g sysv rmid)
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void lock_dealloc(gen_lock_t* lock); - deallocates the lock's shared m.
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void lock_get(gen_lock_t* lock); - lock (mutex down)
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void lock_release(gen_lock_t* lock); - unlock (mutex up)
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lock sets:
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----------
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type: gen_lock_set_t
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gen_lock_set_t* lock_set_alloc(no) - allocs a lock set in shm.
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gen_lock_set_t* lock_set_init(gen_lock_set_t* set); - inits the lock set
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void lock_set_destroy(gen_lock_set_t* s); - removes the lock set
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void lock_set_dealloc(gen_lock_set_t* s); - deallocs the lock set shm.
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void lock_set_get(gen_lock_set_t* s, int i); - locks sem i from the set
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void lock_set_release(gen_lock_set_t* s, int i) - unlocks sem i from the set
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WARNING: - lock_set_init may fail for large number of sems (e.g. sysv).
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- signals are not treated! (some locks are "awakened" by the signals)
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*/
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#ifndef _locking_h
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#define _locking_h
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/* the order is important */
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#include "lock_ops.h"
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#include "lock_alloc.h"
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#endif
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