lib/libc_r/uthread/uthread_switch_np.c

   1 /*
   2  * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>.
   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 Daniel Eischen.
  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 DANIEL EISCHEN 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  * $FreeBSD: src/lib/libc_r/uthread/uthread_switch_np.c,v 1.3.2.1 2002/10/22 14:44:03 fjoe Exp $
  33  * $DragonFly: src/lib/libc_r/uthread/uthread_switch_np.c,v 1.3 2005/05/30 20:50:53 joerg Exp $
  34  */
  35 #include <errno.h>
  36 #include <pthread.h>
  37 #include <pthread_np.h>
  38 #include "pthread_private.h"
  39
  40
  41 int
  42 _pthread_switch_add_np(pthread_switch_routine_t routine)
  43 {
  44         int ret = 0;
  45
  46         if (routine == NULL)
  47                 /* Return an invalid argument error: */
  48                 ret = EINVAL;
  49         else
  50                 /* Shouldn't need a lock to protect this assigment. */
  51                 _sched_switch_hook = routine;
  52
  53         return(ret);
  54 }
  55
  56 int
  57 _pthread_switch_delete_np(pthread_switch_routine_t routine)
  58 {
  59         int ret = 0;
  60
  61         if (routine != _sched_switch_hook)
  62                 /* Return an invalid argument error: */
  63                 ret = EINVAL;
  64         else
  65                 /* Shouldn't need a lock to protect this assigment. */
  66                 _sched_switch_hook = NULL;
  67
  68         return(ret);
  69 }
  70
  71 __strong_reference(_pthread_switch_add_np, pthread_switch_add_np);
  72 __strong_reference(_pthread_switch_delete_np, pthread_switch_delete_np);