event_attr_destroy.c

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/*
** Copyright (C) 2005 by Kevin L. Mitchell <klmitch@mit.edu>
**
** This program 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.
**
** This program 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
**
** @(#)$Id: event_attr_destroy.c,v 1.5 2005/06/04 17:57:03 klmitch Exp $
*/
#include "event_int.h"

#include <stdlib.h>

RCSTAG("@(#)$Id: event_attr_destroy.c,v 1.5 2005/06/04 17:57:03 klmitch Exp $");

ev_err_t
event_attr_destroy(ev_attr_t *attr)
{
  ev_varlist_t *vl_tmp, *vl_next;
  ev_overvars_t *ov_tmp, *ov_next;

  ev_init(); /* initialize the library */

  if (!ea_verify(attr)) /* must be a valid attr */
    ev_return(EINVAL);

  /* Release all application-registered variables */
  for (vl_tmp = ea_varlist(attr); vl_tmp; vl_tmp = vl_next) {
    vl_next = vl_tmp->vl_next; /* what comes next? */

    free(vl_tmp); /* release the memory */
  }

  /* Release all application-overridden variables */
  for (ov_tmp = ea_ovars(attr); ov_tmp; ov_tmp = ov_next) {
    ov_next = ov_tmp->ov_next; /* what comes next? */

    free(ov_tmp); /* release the memory */
  }

  free(*attr); /* release the memory... */

  *attr = 0; /* and zero the caller's pointer */

  ev_return(0); /* all done! */
}

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