1bb535300SJeff Roberson /* 2bb535300SJeff Roberson * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>. 3bb535300SJeff Roberson * All rights reserved. 4bb535300SJeff Roberson * 5bb535300SJeff Roberson * Redistribution and use in source and binary forms, with or without 6bb535300SJeff Roberson * modification, are permitted provided that the following conditions 7bb535300SJeff Roberson * are met: 8bb535300SJeff Roberson * 1. Redistributions of source code must retain the above copyright 9bb535300SJeff Roberson * notice, this list of conditions and the following disclaimer. 10bb535300SJeff Roberson * 2. Redistributions in binary form must reproduce the above copyright 11bb535300SJeff Roberson * notice, this list of conditions and the following disclaimer in the 12bb535300SJeff Roberson * documentation and/or other materials provided with the distribution. 13bb535300SJeff Roberson * 3. All advertising materials mentioning features or use of this software 14bb535300SJeff Roberson * must display the following acknowledgement: 15bb535300SJeff Roberson * This product includes software developed by Daniel Eischen. 16bb535300SJeff Roberson * 4. Neither the name of the author nor the names of any co-contributors 17bb535300SJeff Roberson * may be used to endorse or promote products derived from this software 18bb535300SJeff Roberson * without specific prior written permission. 19bb535300SJeff Roberson * 20bb535300SJeff Roberson * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' AND 21bb535300SJeff Roberson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22bb535300SJeff Roberson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23bb535300SJeff Roberson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24bb535300SJeff Roberson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25bb535300SJeff Roberson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26bb535300SJeff Roberson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27bb535300SJeff Roberson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28bb535300SJeff Roberson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29bb535300SJeff Roberson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30bb535300SJeff Roberson * SUCH DAMAGE. 31bb535300SJeff Roberson * 32bb535300SJeff Roberson * $FreeBSD$ 33bb535300SJeff Roberson */ 34bb535300SJeff Roberson #include <errno.h> 35bb535300SJeff Roberson #include <sys/param.h> 36bb535300SJeff Roberson #include <pthread.h> 37bb535300SJeff Roberson #include "thr_private.h" 38bb535300SJeff Roberson 39bb535300SJeff Roberson __weak_reference(_pthread_setschedparam, pthread_setschedparam); 40bb535300SJeff Roberson 41bb535300SJeff Roberson int 42bb535300SJeff Roberson _pthread_setschedparam(pthread_t pthread, int policy, 43bb535300SJeff Roberson const struct sched_param *param) 44bb535300SJeff Roberson { 45bb535300SJeff Roberson #if 0 /* XXXTHR */ 46bb535300SJeff Roberson int old_prio, in_readyq = 0, ret = 0; 47bb535300SJeff Roberson #endif 48bb535300SJeff Roberson 49bb535300SJeff Roberson if ((param == NULL) || (policy < SCHED_FIFO) || (policy > SCHED_RR)) 50bb535300SJeff Roberson return (EINVAL); 51bb535300SJeff Roberson 52bb535300SJeff Roberson if ((param->sched_priority < PTHREAD_MIN_PRIORITY) || 53bb535300SJeff Roberson (param->sched_priority > PTHREAD_MAX_PRIORITY)) 54bb535300SJeff Roberson return (ENOTSUP); 55bb535300SJeff Roberson 56bb535300SJeff Roberson return (0); 57bb535300SJeff Roberson #if 0 /* XXXTHR */ 58bb535300SJeff Roberson /* Find the thread in the list of active threads: */ 59bb535300SJeff Roberson if ((ret = _find_thread(pthread)) == 0) { 60bb535300SJeff Roberson GIANT_LOCK(); 61bb535300SJeff Roberson 62bb535300SJeff Roberson if (param->sched_priority != 63bb535300SJeff Roberson PTHREAD_BASE_PRIORITY(pthread->base_priority)) { 64bb535300SJeff Roberson /* 65bb535300SJeff Roberson * Remove the thread from its current priority 66bb535300SJeff Roberson * queue before any adjustments are made to its 67bb535300SJeff Roberson * active priority: 68bb535300SJeff Roberson */ 69bb535300SJeff Roberson old_prio = pthread->active_priority; 70bb535300SJeff Roberson if ((pthread->flags & PTHREAD_FLAGS_IN_PRIOQ) != 0) { 71bb535300SJeff Roberson in_readyq = 1; 72bb535300SJeff Roberson PTHREAD_PRIOQ_REMOVE(pthread); 73bb535300SJeff Roberson } 74bb535300SJeff Roberson 75bb535300SJeff Roberson /* Set the thread base priority: */ 76bb535300SJeff Roberson pthread->base_priority &= 77bb535300SJeff Roberson (PTHREAD_SIGNAL_PRIORITY | PTHREAD_RT_PRIORITY); 78bb535300SJeff Roberson pthread->base_priority = param->sched_priority; 79bb535300SJeff Roberson 80bb535300SJeff Roberson /* Recalculate the active priority: */ 81bb535300SJeff Roberson pthread->active_priority = MAX(pthread->base_priority, 82bb535300SJeff Roberson pthread->inherited_priority); 83bb535300SJeff Roberson 84bb535300SJeff Roberson if (in_readyq) { 85bb535300SJeff Roberson if ((pthread->priority_mutex_count > 0) && 86bb535300SJeff Roberson (old_prio > pthread->active_priority)) { 87bb535300SJeff Roberson /* 88bb535300SJeff Roberson * POSIX states that if the priority is 89bb535300SJeff Roberson * being lowered, the thread must be 90bb535300SJeff Roberson * inserted at the head of the queue for 91bb535300SJeff Roberson * its priority if it owns any priority 92bb535300SJeff Roberson * protection or inheritence mutexes. 93bb535300SJeff Roberson */ 94bb535300SJeff Roberson PTHREAD_PRIOQ_INSERT_HEAD(pthread); 95bb535300SJeff Roberson } 96bb535300SJeff Roberson else 97bb535300SJeff Roberson PTHREAD_PRIOQ_INSERT_TAIL(pthread); 98bb535300SJeff Roberson } 99bb535300SJeff Roberson 100bb535300SJeff Roberson /* 101bb535300SJeff Roberson * Check for any mutex priority adjustments. This 102bb535300SJeff Roberson * includes checking for a priority mutex on which 103bb535300SJeff Roberson * this thread is waiting. 104bb535300SJeff Roberson */ 105bb535300SJeff Roberson _mutex_notify_priochange(pthread); 106bb535300SJeff Roberson } 107bb535300SJeff Roberson 108bb535300SJeff Roberson /* Set the scheduling policy: */ 109bb535300SJeff Roberson pthread->attr.sched_policy = policy; 110bb535300SJeff Roberson 111bb535300SJeff Roberson GIANT_UNLOCK(); 112bb535300SJeff Roberson } 113bb535300SJeff Roberson return(ret); 114bb535300SJeff Roberson #endif 115bb535300SJeff Roberson } 116