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118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
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/* Linuxthreads - a simple clone()-based implementation of Posix */
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/* threads for Linux. */
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/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
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/* */
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/* This program is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU Library General Public License */
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/* as published by the Free Software Foundation; either version 2 */
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/* of the License, or (at your option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, */
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/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
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/* GNU Library General Public License for more details. */
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/* Handling of thread attributes */
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#include <unistd.h>
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#include "pthread.h"
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#include "internals.h"
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int pthread_attr_init(pthread_attr_t *attr)
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{
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attr->detachstate = PTHREAD_CREATE_JOINABLE;
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attr->schedpolicy = SCHED_OTHER;
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attr->schedparam.sched_priority = 0;
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attr->inheritsched = PTHREAD_EXPLICIT_SCHED;
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attr->scope = PTHREAD_SCOPE_SYSTEM;
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return 0;
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}
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int pthread_attr_destroy(pthread_attr_t *attr)
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{
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return 0;
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}
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int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate)
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{
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if (detachstate < PTHREAD_CREATE_JOINABLE ||
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detachstate > PTHREAD_CREATE_DETACHED)
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return EINVAL;
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attr->detachstate = detachstate;
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return 0;
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}
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int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate)
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{
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*detachstate = attr->detachstate;
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return 0;
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}
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int pthread_attr_setschedparam(pthread_attr_t *attr,
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const struct sched_param *param)
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{
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int max_prio = __sched_get_priority_max(attr->schedpolicy);
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int min_prio = __sched_get_priority_min(attr->schedpolicy);
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if (param->sched_priority < min_prio || param->sched_priority > max_prio)
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return EINVAL;
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attr->schedparam = *param;
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return 0;
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}
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int pthread_attr_getschedparam(const pthread_attr_t *attr,
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struct sched_param *param)
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{
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*param = attr->schedparam;
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return 0;
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}
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int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
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{
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if (policy != SCHED_OTHER && policy != SCHED_FIFO && policy != SCHED_RR)
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return EINVAL;
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if (policy != SCHED_OTHER && geteuid() != 0)
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return ENOTSUP;
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attr->schedpolicy = policy;
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return 0;
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}
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int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy)
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{
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*policy = attr->schedpolicy;
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return 0;
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}
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int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit)
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{
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if (inherit != PTHREAD_INHERIT_SCHED && inherit != PTHREAD_EXPLICIT_SCHED)
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return EINVAL;
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attr->inheritsched = inherit;
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return 0;
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}
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int pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit)
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{
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*inherit = attr->inheritsched;
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return 0;
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}
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int pthread_attr_setscope(pthread_attr_t *attr, int scope)
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{
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switch (scope) {
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case PTHREAD_SCOPE_SYSTEM:
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attr->scope = scope;
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return 0;
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case PTHREAD_SCOPE_PROCESS:
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return ENOTSUP;
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default:
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return EINVAL;
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}
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}
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int pthread_attr_getscope(const pthread_attr_t *attr, int *scope)
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{
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*scope = attr->scope;
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return 0;
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}
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