diff options
Diffstat (limited to 'lib/libthr/thread/thr_setprio.c')
| -rw-r--r-- | lib/libthr/thread/thr_setprio.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_setprio.c b/lib/libthr/thread/thr_setprio.c new file mode 100644 index 0000000..b1b2352 --- /dev/null +++ b/lib/libthr/thread/thr_setprio.c @@ -0,0 +1,82 @@ +/* + * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the author nor the names of any co-contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include "namespace.h" +#include <pthread.h> +#include "un-namespace.h" + +#include "thr_private.h" + +__weak_reference(_pthread_setprio, pthread_setprio); + +int +_pthread_setprio(pthread_t pthread, int prio) +{ + struct pthread *curthread = _get_curthread(); + struct sched_param param; + int ret; + + param.sched_priority = prio; + if (pthread == curthread) { + THR_LOCK(curthread); + if (curthread->attr.sched_policy == SCHED_OTHER || + curthread->attr.prio == prio) { + curthread->attr.prio = prio; + ret = 0; + } else { + ret = _thr_setscheduler(curthread->tid, + curthread->attr.sched_policy, ¶m); + if (ret == -1) + ret = errno; + else + curthread->attr.prio = prio; + } + THR_UNLOCK(curthread); + } else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0)) + == 0) { + THR_THREAD_LOCK(curthread, pthread); + if (pthread->attr.sched_policy == SCHED_OTHER || + pthread->attr.prio == prio) { + pthread->attr.prio = prio; + ret = 0; + } else { + ret = _thr_setscheduler(pthread->tid, + curthread->attr.sched_policy, ¶m); + if (ret == -1) + ret = errno; + else + pthread->attr.prio = prio; + } + THR_THREAD_UNLOCK(curthread, pthread); + _thr_ref_delete(curthread, pthread); + } + return (ret); +} |
