sysdeps/unix/sysv/linux/mq_notify.c

   1 /* Copyright (C) 2004, 2005 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <mqueue.h>
  21 #include <stddef.h>
  22 #include <sysdep.h>
  23
  24 #ifdef __NR_mq_notify
  25
  26 /* Register notification upon message arrival to an empty message queue
  27    MQDES.  */
  28 int
  29 mq_notify (mqd_t mqdes, const struct sigevent *notification)
  30 {
  31   /* mq_notify which handles SIGEV_THREAD is included in the thread
  32      add-on.  */
  33   if (notification != NULL
  34       && notification->sigev_notify == SIGEV_THREAD)
  35     {
  36       __set_errno (ENOSYS);
  37       return -1;
  38     }
  39   return INLINE_SYSCALL (mq_notify, 2, mqdes, notification);
  40 }
  41
  42 #else
  43 # include <rt/mq_notify.c>
  44 #endif