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      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 (at) 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 */
     87