diff options
Diffstat (limited to 'lib/libkse/thread/thr_setschedparam.c')
| -rw-r--r-- | lib/libkse/thread/thr_setschedparam.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/lib/libkse/thread/thr_setschedparam.c b/lib/libkse/thread/thr_setschedparam.c deleted file mode 100644 index 63cd073..0000000 --- a/lib/libkse/thread/thr_setschedparam.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>. - * 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. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Daniel Eischen. - * 4. 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 DANIEL EISCHEN 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 <errno.h> -#include <sys/param.h> -#include <pthread.h> -#include "thr_private.h" - -__weak_reference(_pthread_setschedparam, pthread_setschedparam); - -int -_pthread_setschedparam(pthread_t pthread, int policy, - const struct sched_param *param) -{ - struct pthread *curthread = _get_curthread(); - int in_syncq; - int in_readyq = 0; - int old_prio; - int ret = 0; - - if ((param == NULL) || (policy < SCHED_FIFO) || (policy > SCHED_RR)) { - /* Return an invalid argument error: */ - ret = EINVAL; - } else if ((param->sched_priority < THR_MIN_PRIORITY) || - (param->sched_priority > THR_MAX_PRIORITY)) { - /* Return an unsupported value error. */ - ret = ENOTSUP; - - /* Find the thread in the list of active threads: */ - } else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0)) - == 0) { - /* - * Lock the threads scheduling queue while we change - * its priority: - */ - THR_SCHED_LOCK(curthread, pthread); - if ((pthread->state == PS_DEAD) || - (pthread->state == PS_DEADLOCK) || - ((pthread->flags & THR_FLAGS_EXITING) != 0)) { - THR_SCHED_UNLOCK(curthread, pthread); - _thr_ref_delete(curthread, pthread); - return (ESRCH); - } - in_syncq = pthread->sflags & THR_FLAGS_IN_SYNCQ; - - /* Set the scheduling policy: */ - pthread->attr.sched_policy = policy; - - if (param->sched_priority == - THR_BASE_PRIORITY(pthread->base_priority)) - /* - * There is nothing to do; unlock the threads - * scheduling queue. - */ - THR_SCHED_UNLOCK(curthread, pthread); - else { - /* - * Remove the thread from its current priority - * queue before any adjustments are made to its - * active priority: - */ - old_prio = pthread->active_priority; - if ((pthread->flags & THR_FLAGS_IN_RUNQ) != 0) { - in_readyq = 1; - THR_RUNQ_REMOVE(pthread); - } - - /* Set the thread base priority: */ - pthread->base_priority &= - (THR_SIGNAL_PRIORITY | THR_RT_PRIORITY); - pthread->base_priority = param->sched_priority; - - /* Recalculate the active priority: */ - pthread->active_priority = MAX(pthread->base_priority, - pthread->inherited_priority); - - if (in_readyq) { - if ((pthread->priority_mutex_count > 0) && - (old_prio > pthread->active_priority)) { - /* - * POSIX states that if the priority is - * being lowered, the thread must be - * inserted at the head of the queue for - * its priority if it owns any priority - * protection or inheritence mutexes. - */ - THR_RUNQ_INSERT_HEAD(pthread); - } - else - THR_RUNQ_INSERT_TAIL(pthread); - } - - /* Unlock the threads scheduling queue: */ - THR_SCHED_UNLOCK(curthread, pthread); - - /* - * Check for any mutex priority adjustments. This - * includes checking for a priority mutex on which - * this thread is waiting. - */ - _mutex_notify_priochange(curthread, pthread, in_syncq); - } - _thr_ref_delete(curthread, pthread); - } - return (ret); -} |
