465 lines
8.8 KiB
C
465 lines
8.8 KiB
C
/* $NetBSD: pthread_attr.c,v 1.16 2012/03/02 18:06:05 joerg Exp $ */
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/*-
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* Copyright (c) 2001, 2002, 2003, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Nathan J. Williams.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: pthread_attr.c,v 1.16 2012/03/02 18:06:05 joerg Exp $");
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifndef __lint__
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#define pthread_attr_get_np _pthread_attr_get_np
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#endif
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#include "pthread.h"
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#include "pthread_int.h"
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__weak_alias(pthread_attr_get_np, _pthread_attr_get_np)
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static struct pthread_attr_private *pthread__attr_init_private(
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pthread_attr_t *);
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static struct pthread_attr_private *
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pthread__attr_init_private(pthread_attr_t *attr)
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{
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struct pthread_attr_private *p;
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if ((p = attr->pta_private) != NULL)
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return p;
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p = malloc(sizeof(*p));
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if (p != NULL) {
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memset(p, 0, sizeof(*p));
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attr->pta_private = p;
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p->ptap_policy = SCHED_OTHER;
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}
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return p;
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}
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int
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pthread_attr_init(pthread_attr_t *attr)
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{
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attr->pta_magic = PT_ATTR_MAGIC;
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attr->pta_flags = 0;
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attr->pta_private = NULL;
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return 0;
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}
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int
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pthread_attr_destroy(pthread_attr_t *attr)
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{
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struct pthread_attr_private *p;
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if ((p = attr->pta_private) != NULL)
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free(p);
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return 0;
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}
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int
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pthread_attr_get_np(pthread_t thread, pthread_attr_t *attr)
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{
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struct pthread_attr_private *p;
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p = pthread__attr_init_private(attr);
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if (p == NULL)
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return ENOMEM;
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attr->pta_flags = thread->pt_flags &
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(PT_FLAG_DETACHED | PT_FLAG_SCOPE_SYSTEM | PT_FLAG_EXPLICIT_SCHED);
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p->ptap_namearg = thread->pt_name;
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p->ptap_stackaddr = thread->pt_stack.ss_sp;
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p->ptap_stacksize = thread->pt_stack.ss_size;
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p->ptap_guardsize = pthread__pagesize;
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return pthread_getschedparam(thread, &p->ptap_policy, &p->ptap_sp);
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}
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int
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pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate)
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{
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if (attr->pta_flags & PT_FLAG_DETACHED)
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*detachstate = PTHREAD_CREATE_DETACHED;
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else
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*detachstate = PTHREAD_CREATE_JOINABLE;
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return 0;
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}
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int
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pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate)
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{
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switch (detachstate) {
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case PTHREAD_CREATE_JOINABLE:
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attr->pta_flags &= ~PT_FLAG_DETACHED;
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break;
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case PTHREAD_CREATE_DETACHED:
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attr->pta_flags |= PT_FLAG_DETACHED;
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break;
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default:
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return EINVAL;
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}
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return 0;
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}
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int
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pthread_attr_getguardsize(const pthread_attr_t *attr, size_t *guard)
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{
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struct pthread_attr_private *p;
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if ((p = attr->pta_private) == NULL)
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*guard = (size_t)sysconf(_SC_PAGESIZE);
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else
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*guard = p->ptap_guardsize;
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return 0;
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}
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int
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pthread_attr_setguardsize(pthread_attr_t *attr, size_t guard)
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{
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struct pthread_attr_private *p;
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p = pthread__attr_init_private(attr);
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if (p == NULL)
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return ENOMEM;
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p->ptap_guardsize = guard;
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return 0;
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}
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int
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pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit)
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{
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if (attr->pta_flags & PT_FLAG_EXPLICIT_SCHED)
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*inherit = PTHREAD_EXPLICIT_SCHED;
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else
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*inherit = PTHREAD_INHERIT_SCHED;
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return 0;
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}
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int
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pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit)
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{
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switch (inherit) {
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case PTHREAD_INHERIT_SCHED:
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attr->pta_flags &= ~PT_FLAG_EXPLICIT_SCHED;
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break;
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case PTHREAD_EXPLICIT_SCHED:
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attr->pta_flags |= PT_FLAG_EXPLICIT_SCHED;
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break;
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default:
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return EINVAL;
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}
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return 0;
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}
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int
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pthread_attr_getscope(const pthread_attr_t *attr, int *scope)
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{
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if (attr->pta_flags & PT_FLAG_SCOPE_SYSTEM)
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*scope = PTHREAD_SCOPE_SYSTEM;
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else
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*scope = PTHREAD_SCOPE_PROCESS;
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return 0;
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}
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int
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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_PROCESS:
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attr->pta_flags &= ~PT_FLAG_SCOPE_SYSTEM;
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break;
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case PTHREAD_SCOPE_SYSTEM:
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attr->pta_flags |= PT_FLAG_SCOPE_SYSTEM;
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break;
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default:
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return EINVAL;
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}
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return 0;
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}
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int
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pthread_attr_setschedparam(pthread_attr_t *attr,
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const struct sched_param *param)
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{
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struct pthread_attr_private *p;
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int error;
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if (param == NULL)
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return EINVAL;
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p = pthread__attr_init_private(attr);
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if (p == NULL)
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return ENOMEM;
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error = pthread__checkpri(param->sched_priority);
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if (error == 0)
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p->ptap_sp = *param;
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return error;
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}
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int
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pthread_attr_getschedparam(const pthread_attr_t *attr,
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struct sched_param *param)
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{
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struct pthread_attr_private *p;
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if (param == NULL)
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return EINVAL;
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p = attr->pta_private;
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if (p == NULL)
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memset(param, 0, sizeof(*param));
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else
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*param = p->ptap_sp;
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return 0;
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}
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int
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pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
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{
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struct pthread_attr_private *p;
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switch (policy) {
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case SCHED_OTHER:
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case SCHED_FIFO:
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case SCHED_RR:
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p = pthread__attr_init_private(attr);
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if (p == NULL)
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return ENOMEM;
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p->ptap_policy = policy;
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return 0;
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default:
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return ENOTSUP;
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}
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}
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int
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pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy)
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{
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struct pthread_attr_private *p;
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p = attr->pta_private;
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if (p == NULL) {
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*policy = SCHED_OTHER;
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return 0;
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}
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*policy = p->ptap_policy;
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return 0;
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}
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int
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pthread_attr_getstack(const pthread_attr_t *attr, void **addr, size_t *size)
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{
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struct pthread_attr_private *p;
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if ((p = attr->pta_private) == NULL) {
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*addr = NULL;
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*size = pthread__stacksize;
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} else {
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*addr = p->ptap_stackaddr;
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*size = p->ptap_stacksize;
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}
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return 0;
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}
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int
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pthread_attr_setstack(pthread_attr_t *attr, void *addr, size_t size)
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{
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struct pthread_attr_private *p;
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p = pthread__attr_init_private(attr);
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if (p == NULL)
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return ENOMEM;
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p->ptap_stackaddr = addr;
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p->ptap_stacksize = size;
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return 0;
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}
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int
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pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *size)
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{
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struct pthread_attr_private *p;
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if ((p = attr->pta_private) == NULL)
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*size = pthread__stacksize;
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else
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*size = p->ptap_stacksize;
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return 0;
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}
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int
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pthread_attr_setstacksize(pthread_attr_t *attr, size_t size)
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{
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struct pthread_attr_private *p;
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if (size < (size_t)sysconf(_SC_THREAD_STACK_MIN))
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return EINVAL;
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p = pthread__attr_init_private(attr);
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if (p == NULL)
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return ENOMEM;
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p->ptap_stacksize = size;
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return 0;
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}
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int
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pthread_attr_getstackaddr(const pthread_attr_t *attr, void **addr)
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{
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struct pthread_attr_private *p;
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if ((p = attr->pta_private) == NULL)
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*addr = NULL;
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else
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*addr = p->ptap_stackaddr;
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return 0;
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}
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int
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pthread_attr_setstackaddr(pthread_attr_t *attr, void *addr)
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{
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struct pthread_attr_private *p;
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p = pthread__attr_init_private(attr);
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if (p == NULL)
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return ENOMEM;
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p->ptap_stackaddr = addr;
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return 0;
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}
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int
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pthread_attr_getname_np(const pthread_attr_t *attr, char *name, size_t len,
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void **argp)
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{
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struct pthread_attr_private *p;
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if ((p = attr->pta_private) == NULL) {
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name[0] = '\0';
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if (argp != NULL)
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*argp = NULL;
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} else {
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strlcpy(name, p->ptap_name, len);
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if (argp != NULL)
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*argp = p->ptap_namearg;
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}
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return 0;
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}
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int
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pthread_attr_setname_np(pthread_attr_t *attr, const char *name, void *arg)
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{
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struct pthread_attr_private *p;
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int namelen;
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p = pthread__attr_init_private(attr);
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if (p == NULL)
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return ENOMEM;
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namelen = snprintf(p->ptap_name, PTHREAD_MAX_NAMELEN_NP, name, arg);
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if (namelen >= PTHREAD_MAX_NAMELEN_NP) {
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p->ptap_name[0] = '\0';
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return EINVAL;
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}
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p->ptap_namearg = arg;
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return 0;
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}
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int
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pthread_attr_setcreatesuspend_np(pthread_attr_t *attr)
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{
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attr->pta_flags |= PT_FLAG_SUSPENDED;
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return 0;
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}
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int
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pthread_getattr_np(pthread_t thread, pthread_attr_t *attr)
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{
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int error;
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if ((error = pthread_attr_init(attr)) != 0)
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return error;
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if ((error = pthread_attr_get_np(thread, attr)) != 0) {
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(void)pthread_attr_destroy(attr);
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return error;
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}
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return 0;
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}
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