modules/ims_registrar_scscf: Additional file needed for new notify process

	New file sem.h used by the process that handles notifies

modules/ims_registrar_scscf/sem.h

@@ -0,0 +1,90 @@
+/*
+ * $Id$
+ *
+ * Copyright (C) 2012 Smile Communications, [email protected]
+ * Copyright (C) 2012 Smile Communications, [email protected]
+ * 
+ * The initial version of this code was written by Dragos Vingarzan
+ * (dragos(dot)vingarzan(at)fokus(dot)fraunhofer(dot)de and the
+ * Fruanhofer Institute. It was and still is maintained in a separate
+ * branch of the original SER. We are therefore migrating it to
+ * Kamailio/SR and look forward to maintaining it from here on out.
+ * 2011/2012 Smile Communications, Pty. Ltd.
+ * ported/maintained/improved by 
+ * Jason Penton (jason(dot)penton(at)smilecoms.com and
+ * Richard Good (richard(dot)good(at)smilecoms.com) as part of an 
+ * effort to add full IMS support to Kamailio/SR using a new and
+ * improved architecture
+ * 
+ * NB: Alot of this code was originally part of OpenIMSCore,
+ * FhG Fokus. 
+ * Copyright (C) 2004-2006 FhG Fokus
+ * Thanks for great work! This is an effort to 
+ * break apart the various CSCF functions into logically separate
+ * components. We hope this will drive wider use. We also feel
+ * that in this way the architecture is more complete and thereby easier
+ * to manage in the Kamailio/SR environment
+ *
+ * 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
+ *
+ * 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
+ * 
+ *
+ *
+ * History:
+ * --------
+ *  2011-02-02  initial version (jason.penton)
+ */
+
+#ifndef __SEM_H
+#define __SEM_H
+
+	#include <semaphore.h>
+
+	typedef sem_t gen_sem_t;
+
+	/**
+	 * Create a new unnamed semaphore and initialize it
+	 * @param value - 0 if it should be pre-locked, 1 if not, or how many locks until block
+	 * @return
+	 */
+    #define sem_new(sem_ptr,value)\
+	do {\
+		sem_ptr=shm_malloc(sizeof(gen_sem_t));\
+		if (!sem_ptr){\
+			LM_ERR("Error allocating %lx bytes of shm!\n",sizeof(gen_sem_t));\
+		}	\
+		if (sem_init(sem_ptr, 1, value)<0) {\
+			LM_ERR("Error > %s\n",strerror(errno));\
+		}\
+	} while(0)
+	
+    #define sem_free(sem)\
+	do {\
+		if (sem) {\
+			sem_destroy(sem);\
+			shm_free(sem);\
+			sem=0;\
+		}\
+	} while(0)
+	
+	
+	#define sem_get(sem) sem_wait(sem)
+	#define sem_tryget(sem) sem_trywait(sem)
+	#define sem_timedget(sem,abs_timeout) sem_trywait(sem,abs_timeout)
+	
+	#define sem_release(sem) sem_post(sem)
+
+#endif