lib/libc_r/uthread/uthread_affinity.c

   1 /*
   2  * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by John Birrell.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <sys/lwp.h>
  34 #include <errno.h>
  35 #include <string.h>
  36 #include <pthread.h>
  37 #include <pthread_np.h>
  38 #include "pthread_private.h"
  39
  40 int
  41 _pthread_getaffinity_np(pthread_t thread, size_t cpusetsize,
  42     cpu_set_t *mask)
  43 {
  44
  45         /* Check if the caller has specified a valid thread: */
  46         if (thread != NULL && thread->magic == PTHREAD_MAGIC) {
  47                 cpu_set_t mask1;
  48                 int ret;
  49
  50                 ret = 0;
  51                 if (lwp_getaffinity(0, -1, &mask1) < 0) {
  52                         ret = errno;
  53                         return (ret);
  54                 }
  55
  56                 if (cpusetsize > sizeof(mask1)) {
  57                         memset(mask, 0, cpusetsize);
  58                         memcpy(mask, &mask1, sizeof(mask1));
  59                 } else {
  60                         memcpy(mask, &mask1, cpusetsize);
  61                 }
  62                 return (0);
  63         }
  64         return (ESRCH);
  65 }
  66 __strong_reference(_pthread_getaffinity_np, pthread_getaffinity_np);
  67
  68 int
  69 _pthread_setaffinity_np(pthread_t thread, size_t cpusetsize,
  70     const cpu_set_t *mask)
  71 {
  72
  73         return (EOPNOTSUPP);
  74 }
  75 __strong_reference(_pthread_setaffinity_np, pthread_setaffinity_np);