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91 lines
2.8 KiB
91 lines
2.8 KiB
/*
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* $Id$
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*
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* Copyright (C) 2012 Smile Communications, jason.penton@smilecoms.com
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* Copyright (C) 2012 Smile Communications, richard.good@smilecoms.com
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*
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* The initial version of this code was written by Dragos Vingarzan
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* (dragos(dot)vingarzan(at)fokus(dot)fraunhofer(dot)de and the
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* Fruanhofer Institute. It was and still is maintained in a separate
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* branch of the original SER. We are therefore migrating it to
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* Kamailio/SR and look forward to maintaining it from here on out.
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* 2011/2012 Smile Communications, Pty. Ltd.
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* ported/maintained/improved by
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* Jason Penton (jason(dot)penton(at)smilecoms.com and
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* Richard Good (richard(dot)good(at)smilecoms.com) as part of an
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* effort to add full IMS support to Kamailio/SR using a new and
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* improved architecture
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*
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* NB: Alot of this code was originally part of OpenIMSCore,
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* FhG Fokus.
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* Copyright (C) 2004-2006 FhG Fokus
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* Thanks for great work! This is an effort to
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* break apart the various CSCF functions into logically separate
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* components. We hope this will drive wider use. We also feel
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* that in this way the architecture is more complete and thereby easier
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* to manage in the Kamailio/SR environment
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio 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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* Kamailio 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*
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*
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* History:
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* --------
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* 2011-02-02 initial version (jason.penton)
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*/
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#ifndef __SEM_H
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#define __SEM_H
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#include <semaphore.h>
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typedef sem_t gen_sem_t;
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/**
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* Create a new unnamed semaphore and initialize it
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* @param value - 0 if it should be pre-locked, 1 if not, or how many locks until block
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* @return
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*/
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#define sem_new(sem_ptr,value)\
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do {\
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sem_ptr=shm_malloc(sizeof(gen_sem_t));\
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if (!sem_ptr){\
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LM_ERR("Error allocating %lx bytes of shm!\n",sizeof(gen_sem_t));\
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} \
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if (sem_init(sem_ptr, 1, value)<0) {\
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LM_ERR("Error > %s\n",strerror(errno));\
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}\
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} while(0)
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#define sem_free(sem)\
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do {\
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if (sem) {\
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sem_destroy(sem);\
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shm_free(sem);\
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sem=0;\
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}\
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} while(0)
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#define sem_get(sem) sem_wait(sem)
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#define sem_tryget(sem) sem_trywait(sem)
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#define sem_timedget(sem,abs_timeout) sem_trywait(sem,abs_timeout)
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#define sem_release(sem) sem_post(sem)
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#endif
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