StdLib/PosixLib/Gen/closedir.c

   1 /** @file
   2     Close an open directory.
   3
   4     Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
   5     This program and the accompanying materials
   6     are licensed and made available under the terms and conditions of the BSD License
   7     which accompanies this distribution.  The full text of the license may be found at
   8     http://opensource.org/licenses/bsd-license.php
   9
  10     THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11     WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13     Copyright (c) 1983, 1993
  14      Regents of the University of California.  All rights reserved.
  15
  16     Redistribution and use in source and binary forms, with or without
  17     modification, are permitted provided that the following conditions
  18     are met:
  19     1. Redistributions of source code must retain the above copyright
  20        notice, this list of conditions and the following disclaimer.
  21     2. Redistributions in binary form must reproduce the above copyright
  22        notice, this list of conditions and the following disclaimer in the
  23        documentation and/or other materials provided with the distribution.
  24     3. Neither the name of the University nor the names of its contributors
  25        may be used to endorse or promote products derived from this software
  26        without specific prior written permission.
  27
  28     THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30     IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31     ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32     FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33     DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34     OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38     SUCH DAMAGE.
  39
  40     NetBSD: closedir.c,v 1.15 2006/05/17 20:36:50 christos Exp
  41     closedir.c  8.1 (Berkeley) 6/10/93
  42 **/
  43 #include <sys/cdefs.h>
  44
  45 #include  <namespace.h>
  46 #include  <reentrant.h>
  47 #include  <extern.h>
  48 #include <sys/types.h>
  49
  50 #include <assert.h>
  51 #include <dirent.h>
  52 #include <errno.h>
  53 #include <stdlib.h>
  54 #include <unistd.h>
  55
  56 #ifdef __weak_alias
  57 __weak_alias(closedir,_closedir)
  58 #endif
  59
  60 /*
  61  * close a directory.
  62  */
  63 int
  64 closedir(DIR *dirp)
  65 {
  66   int fd;
  67
  68   _DIAGASSERT(dirp != NULL);
  69
  70 #ifdef _REENTRANT
  71   if (__isthreaded)
  72     mutex_lock((mutex_t *)dirp->dd_lock);
  73 #endif
  74   fd = dirp->dd_fd;
  75   dirp->dd_fd = -1;
  76   dirp->dd_loc = 0;
  77   free(dirp->dd_buf);
  78
  79 #ifdef _REENTRANT
  80   if (__isthreaded) {
  81     mutex_unlock((mutex_t *)dirp->dd_lock);
  82     mutex_destroy((mutex_t *)dirp->dd_lock);
  83     free(dirp->dd_lock);
  84   }
  85 #endif
  86   free((void *)dirp);
  87   return(close(fd));
  88 }