kamailio/modules/db_perlvdb/perlvdb_oohelpers.c

/* 
 * $Id: perlvdb_oohelpers.c 770 2007-01-22 10:16:34Z bastian $
 *
 * Perl virtual database module interface
 *
 * Copyright (C) 2007 Collax GmbH
 *                    (Bastian Friedrich <[email protected]>)
 *
 * 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
 *
 */

#include "perlvdb_oohelpers.h"

#include "../../mem/mem.h"

SV *perlvdb_perlmethod(SV *class,
		       const char* method,
		       SV *param1,
		       SV *param2,
		       SV *param3,
		       SV *param4) {
	
	I32 res;
	SV *retval = NULL;
	
	dSP;
	
	               ENTER;
		                      SAVETMPS;
				      
	PUSHMARK(SP);

	/* passed stack:
	 * class, and optionally parameters
	 */
	XPUSHs(class);

	if (param1) {
		XPUSHs(param1);
	}

	if (param2) {
		XPUSHs(param2);
	}

	if (param3) {
		XPUSHs(param3);
	}

	if (param4) {
		XPUSHs(param4);
	}

	PUTBACK;

	res = call_method(method, G_SCALAR | G_EVAL);

	SPAGAIN;

	if (res == 0) {
		retval = &PL_sv_undef;
	} else if (res == 1) {
		retval = POPs;
	} else {
		/* More than one result in Scalar context??? */
		LM_CRIT("got more than one result from scalar method!");
		while (res--) { /* Try to clean stack. This
				   should never happen anyway.*/
			retval = POPs;
		}
	}

	SPAGAIN;

//	if (sv_isobject(retval))
		SvREFCNT_inc(retval);

	FREETMPS;
	LEAVE;

	return retval;
}