dtclose.c   [plain text]

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2007 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#include	"dthdr.h"

/*	Close a dictionary
**
**	Written by Kiem-Phong Vo (05/25/96)
*/
#if __STD_C
int dtclose(reg Dt_t* dt)
#else
int dtclose(dt)
reg Dt_t*	dt;
#endif
{
	Dtdisc_t	*disc;
	int		ev = 0;

	if(!dt || dt->nview > 0 ) /* can't close if being viewed */
		return -1;

	/* announce the close event to see if we should continue */
	disc = dt->disc;
	if(disc->eventf &&
	   (ev = (*disc->eventf)(dt,DT_CLOSE,NIL(Void_t*),disc)) < 0)
		return -1;

	if(dt->view)	/* turn off viewing */
		dtview(dt,NIL(Dt_t*));

	if(ev == 0) /* release all allocated data */
	{	(void)(*(dt->meth->searchf))(dt,NIL(Void_t*),DT_CLEAR);
		if(dtsize(dt) > 0)
			return -1;

		if(dt->data->ntab > 0)
			(*dt->memoryf)(dt,(Void_t*)dt->data->htab,0,disc);
		(*dt->memoryf)(dt,(Void_t*)dt->data,0,disc);
	}

	if(dt->type == DT_MALLOC)
		free((Void_t*)dt);
	else if(ev == 0 && dt->type == DT_MEMORYF)
		(*dt->memoryf)(dt, (Void_t*)dt, 0, disc);

	if(disc->eventf)
		(void)(*disc->eventf)(dt, DT_ENDCLOSE, NIL(Void_t*), disc);

	return 0;
}