native_client_sdk/src/libraries/third_party/pthreads-win32/pthread_condattr_destroy.c

   1 /*
   2  * condvar_attr_destroy.c
   3  *
   4  * Description:
   5  * This translation unit implements condition variables and their primitives.
   6  *
   7  *
   8  * --------------------------------------------------------------------------
   9  *
  10  *      Pthreads-win32 - POSIX Threads Library for Win32
  11  *      Copyright(C) 1998 John E. Bossom
  12  *      Copyright(C) 1999,2005 Pthreads-win32 contributors
  13  *
  14  *      Contact Email: rpj@callisto.canberra.edu.au
  15  *
  16  *      The current list of contributors is contained
  17  *      in the file CONTRIBUTORS included with the source
  18  *      code distribution. The list can also be seen at the
  19  *      following World Wide Web location:
  20  *      http://sources.redhat.com/pthreads-win32/contributors.html
  21  *
  22  *      This library is free software; you can redistribute it and/or
  23  *      modify it under the terms of the GNU Lesser General Public
  24  *      License as published by the Free Software Foundation; either
  25  *      version 2 of the License, or (at your option) any later version.
  26  *
  27  *      This library is distributed in the hope that it will be useful,
  28  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  30  *      Lesser General Public License for more details.
  31  *
  32  *      You should have received a copy of the GNU Lesser General Public
  33  *      License along with this library in the file COPYING.LIB;
  34  *      if not, write to the Free Software Foundation, Inc.,
  35  *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  36  */
  37
  38 #include "pthread.h"
  39 #include "implement.h"
  40
  41
  42 int
  43 pthread_condattr_destroy (pthread_condattr_t * attr)
  44      /*
  45       * ------------------------------------------------------
  46       * DOCPUBLIC
  47       *      Destroys a condition variable attributes object.
  48       *      The object can no longer be used.
  49       *
  50       * PARAMETERS
  51       *      attr
  52       *              pointer to an instance of pthread_condattr_t
  53       *
  54       *
  55       * DESCRIPTION
  56       *      Destroys a condition variable attributes object.
  57       *      The object can no longer be used.
  58       *
  59       *      NOTES:
  60       *      1)      Does not affect condition variables created
  61       *              using 'attr'
  62       *
  63       * RESULTS
  64       *              0               successfully released attr,
  65       *              EINVAL          'attr' is invalid.
  66       *
  67       * ------------------------------------------------------
  68       */
  69 {
  70   int result = 0;
  71
  72   if (attr == NULL || *attr == NULL)
  73     {
  74       result = EINVAL;
  75     }
  76   else
  77     {
  78       (void) free (*attr);
  79
  80       *attr = NULL;
  81       result = 0;
  82     }
  83
  84   return result;
  85
  86 }                               /* pthread_condattr_destroy */