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/* Linuxthreads - a simple clone()-based implementation of Posix */
/* threads for Linux. */
/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
/* */
/* This program is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU Library General Public License */
/* as published by the Free Software Foundation; either version 2 */
/* of the License, or (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU Library General Public License for more details. */
/* Handling of thread attributes */
#include <unistd.h>
#include <sys/param.h>
#include "pthread.h"
#include "internals.h"
int __pthread_attr_init_2_1(pthread_attr_t *attr)
{
size_t ps = __getpagesize ();
attr->detachstate = PTHREAD_CREATE_JOINABLE;
attr->schedpolicy = SCHED_OTHER;
attr->schedparam.sched_priority = 0;
attr->inheritsched = PTHREAD_EXPLICIT_SCHED;
attr->scope = PTHREAD_SCOPE_SYSTEM;
attr->guardsize = ps;
attr->stackaddr = NULL;
attr->stackaddr_set = 0;
attr->stacksize = STACK_SIZE - ps;
return 0;
}
#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
default_symbol_version (__pthread_attr_init_2_1, pthread_attr_init, GLIBC_2.1);
int __pthread_attr_init_2_0(pthread_attr_t *attr)
{
attr->detachstate = PTHREAD_CREATE_JOINABLE;
attr->schedpolicy = SCHED_OTHER;
attr->schedparam.sched_priority = 0;
attr->inheritsched = PTHREAD_EXPLICIT_SCHED;
attr->scope = PTHREAD_SCOPE_SYSTEM;
return 0;
}
symbol_version (__pthread_attr_init_2_0, pthread_attr_init, GLIBC_2.0);
#else
strong_alias (__pthread_attr_init_2_1, pthread_attr_init)
#endif
int pthread_attr_destroy(pthread_attr_t *attr)
{
return 0;
}
int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate)
{
if (detachstate < PTHREAD_CREATE_JOINABLE ||
detachstate > PTHREAD_CREATE_DETACHED)
return EINVAL;
attr->detachstate = detachstate;
return 0;
}
int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate)
{
*detachstate = attr->detachstate;
return 0;
}
int pthread_attr_setschedparam(pthread_attr_t *attr,
const struct sched_param *param)
{
int max_prio = __sched_get_priority_max(attr->schedpolicy);
int min_prio = __sched_get_priority_min(attr->schedpolicy);
if (param->sched_priority < min_prio || param->sched_priority > max_prio)
return EINVAL;
attr->schedparam = *param;
return 0;
}
int pthread_attr_getschedparam(const pthread_attr_t *attr,
struct sched_param *param)
{
*param = attr->schedparam;
return 0;
}
int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
{
if (policy != SCHED_OTHER && policy != SCHED_FIFO && policy != SCHED_RR)
return EINVAL;
if (policy != SCHED_OTHER && geteuid() != 0)
return ENOTSUP;
attr->schedpolicy = policy;
return 0;
}
int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy)
{
*policy = attr->schedpolicy;
return 0;
}
int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit)
{
if (inherit != PTHREAD_INHERIT_SCHED && inherit != PTHREAD_EXPLICIT_SCHED)
return EINVAL;
attr->inheritsched = inherit;
return 0;
}
int pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit)
{
*inherit = attr->inheritsched;
return 0;
}
int pthread_attr_setscope(pthread_attr_t *attr, int scope)
{
switch (scope) {
case PTHREAD_SCOPE_SYSTEM:
attr->scope = scope;
return 0;
case PTHREAD_SCOPE_PROCESS:
return ENOTSUP;
default:
return EINVAL;
}
}
int pthread_attr_getscope(const pthread_attr_t *attr, int *scope)
{
*scope = attr->scope;
return 0;
}
int __pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize)
{
size_t ps = __getpagesize ();
/* First round up the guard size. */
guardsize = roundup (guardsize, ps);
/* The current implementation of LinuxThreads allocates 2MB stack space
for each thread. So the maximum guardsize is 2MB - pagesize. */
if (guardsize >= STACK_SIZE - ps)
return EINVAL;
attr->guardsize = guardsize;
return 0;
}
weak_alias (__pthread_attr_setguardsize, pthread_attr_setguardsize)
int __pthread_attr_getguardsize(const pthread_attr_t *attr, size_t *guardsize)
{
*guardsize = attr->guardsize;
return 0;
}
weak_alias (__pthread_attr_getguardsize, pthread_attr_getguardsize)
int __pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr)
{
attr->stackaddr = stackaddr;
attr->stackaddr_set = 1;
return 0;
}
weak_alias (__pthread_attr_setstackaddr, pthread_attr_setstackaddr)
int __pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackaddr)
{
/* XXX This function has a stupid definition. The standard specifies
no error value but what is if no stack address was set? We simply
return the value we have in the member. */
*stackaddr = attr->stackaddr;
return 0;
}
weak_alias (__pthread_attr_getstackaddr, pthread_attr_etstackaddr)
int __pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize)
{
size_t ps = __getpagesize ();
/* We don't accept value smaller than PTHREAD_STACK_MIN or bigger than
2MB - pagesize. */
if (stacksize < PTHREAD_STACK_MIN || stacksize > STACK_SIZE - ps)
return EINVAL;
attr->stacksize = stacksize;
return 0;
}
weak_alias (__pthread_attr_setstacksize, pthread_attr_setstacksize)
int __pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize)
{
*stacksize = attr->stacksize;
return 0;
}
weak_alias (__pthread_attr_getstacksize, pthread_attr_getstacksize)
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