text: /* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
  
     The GNU C Library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
  
     The GNU C Library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with the GNU C Library; if not, write to the Free
     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
     02111-1307 USA.  */
  
  #include <assert.h>
  #include <errno.h>
  #include <limits.h>
  #include <stdlib.h>
  #include <string.h>
  #include <pthreadP.h>
  #include <shlib-compat.h>
  
  
  /* Defined in pthread_setaffinity.c.  */
  extern size_t __kernel_cpumask_size attribute_hidden;
  extern int __determine_cpumask_size (pid_t tid);
  
  
  int
  __pthread_attr_setaffinity_new (pthread_attr_t *attr, size_t cpusetsize,
  				const cpu_set_t *cpuset)
  {
    struct pthread_attr *iattr;
  
    assert (sizeof (*attr) >= sizeof (struct pthread_attr));
    iattr = (struct pthread_attr *) attr;
  
    if (cpuset == NULL || cpusetsize == 0)
      {
        free (iattr->cpuset);
        iattr->cpuset = NULL;
        iattr->cpusetsize = 0;
      }
    else
      {
        if (__kernel_cpumask_size == 0)
  	{
  	  int res = __determine_cpumask_size (THREAD_SELF->tid);
  	  if (res != 0)
  	    /* Some serious problem.  */
  	    return res;
  	}
  
        /* Check whether the new bitmask has any bit set beyond the
  	 last one the kernel accepts.  */
        for (size_t cnt = __kernel_cpumask_size; cnt < cpusetsize; ++cnt)
  	if (((char *) cpuset)[cnt] != '\0')
  	  /* Found a nonzero byte.  This means the user request cannot be
  	     fulfilled.  */
  	  return EINVAL;
  
        if (iattr->cpusetsize != cpusetsize)
  	{
  	  void *newp = (cpu_set_t *) realloc (iattr->cpuset, cpusetsize);
  	  if (newp == NULL)
  	    return ENOMEM;
  
  	  iattr->cpuset = newp;
  	  iattr->cpusetsize = cpusetsize;
  	}
  
        memcpy (iattr->cpuset, cpuset, cpusetsize);
      }
  
    return 0;
  }
  versioned_symbol (libpthread, __pthread_attr_setaffinity_new,
  		  pthread_attr_setaffinity_np, GLIBC_2_3_4);
  
  
  #if SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4)
  int
  __pthread_attr_setaffinity_old (pthread_attr_t *attr, cpu_set_t *cpuset)
  {
    /* The old interface by default assumed a 1024 processor bitmap.  */
    return __pthread_attr_setaffinity_new (attr, 128, cpuset);
  }
  compat_symbol (libpthread, __pthread_attr_setaffinity_old,
  	       pthread_attr_setaffinity_np, GLIBC_2_3_3);
  #endif
  