/*      $NetBSD: closedir.c,v 1.16 2010/09/26 02:26:59 yamt Exp $       */

/*
* Copyright (c) 1983, 1993
*      Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)closedir.c  8.1 (Berkeley) 6/10/93";
#else
__RCSID("$NetBSD: closedir.c,v 1.16 2010/09/26 02:26:59 yamt Exp $");
#endif
#endif /* LIBC_SCCS and not lint */

#include "namespace.h"
#include "reentrant.h"
#include "extern.h"
#include <sys/types.h>

#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>

#include "dirent_private.h"

#ifdef __weak_alias
__weak_alias(closedir,_closedir)
#endif

/*
* close a directory.
*/
int
closedir(DIR *dirp)
{
       int fd;

       _DIAGASSERT(dirp != NULL);

#ifdef _REENTRANT
       if (__isthreaded)
               mutex_lock((mutex_t *)dirp->dd_lock);
#endif
       fd = dirp->dd_fd;
       dirp->dd_fd = -1;
       _finidir(dirp);

#ifdef _REENTRANT
       if (__isthreaded) {
               mutex_unlock((mutex_t *)dirp->dd_lock);
               mutex_destroy((mutex_t *)dirp->dd_lock);
               free(dirp->dd_lock);
       }
#endif
       free((void *)dirp);
       return(close(fd));
}