nptl/pthread_attr_destroy.c

   1 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <assert.h>
  21 #include <errno.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include "pthreadP.h"
  25 #include <shlib-compat.h>
  26
  27 int
  28 __pthread_attr_destroy (attr)
  29      pthread_attr_t *attr;
  30 {
  31   struct pthread_attr *iattr;
  32
  33   assert (sizeof (*attr) >= sizeof (struct pthread_attr));
  34   iattr = (struct pthread_attr *) attr;
  35
  36 #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
  37   /* In old struct pthread_attr, neither next nor cpuset are
  38      present.  */
  39   if (__builtin_expect ((iattr->flags & ATTR_FLAG_OLDATTR), 0))
  40     return 0;
  41 #endif
  42
  43   /* Enqueue the attributes to the list of all known variables.  */
  44   if (DEBUGGING_P)
  45     {
  46       struct pthread_attr *prevp = NULL;
  47       struct pthread_attr *runp;
  48
  49       lll_lock (__attr_list_lock);
  50
  51       runp = __attr_list;
  52       while (runp != NULL && runp != iattr)
  53         {
  54           prevp = runp;
  55           runp = runp->next;
  56         }
  57
  58       if (runp != NULL)
  59         {
  60           if (prevp == NULL)
  61             __attr_list = iattr->next;
  62           else
  63             prevp->next = iattr->next;
  64         }
  65
  66       lll_unlock (__attr_list_lock);
  67
  68       if (runp == NULL)
  69         /* Not a valid attribute.  */
  70         return EINVAL;
  71     }
  72
  73   /* The affinity CPU set might be allocated dynamically.  */
  74   free (iattr->cpuset);
  75
  76   return 0;
  77 }
  78 strong_alias (__pthread_attr_destroy, pthread_attr_destroy)