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/* $OpenBSD: rthread_attr.c,v 1.8 2006/01/05 08:15:16 otto Exp $ */
/*
* Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
* All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* generic attribute support
*/
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <machine/spinlock.h>
#include <inttypes.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <pthread.h>
#include <pthread_np.h>
#include "rthread.h"
/*
* temp: these need to be added to pthread.h
*/
int pthread_attr_getguardsize(const pthread_attr_t *, size_t *);
int pthread_attr_setguardsize(pthread_attr_t *, size_t);
/*
* Note: stack_size + guard_size == total stack used
*
* pthread_attr_init MUST be called before any other attribute function
* for proper operation.
*
* Every call to pthread_attr_init MUST be matched with a call to
* pthread_attr_destroy to avoid leaking memory. This is an implementation
* requirement, not a POSIX requirement.
*/
int
pthread_attr_init(pthread_attr_t *attrp)
{
pthread_attr_t attr;
attr = malloc(sizeof(*attr));
if (!attr)
return (errno);
memset(attr, 0, sizeof(*attr));
attr->stack_size = RTHREAD_STACK_SIZE_DEF;
attr->guard_size = sysconf(_SC_PAGESIZE);
attr->stack_size -= attr->guard_size;
attr->detach_state = PTHREAD_CREATE_JOINABLE;
*attrp = attr;
return (0);
}
int
pthread_attr_destroy(pthread_attr_t *attrp)
{
free(*attrp);
*attrp = NULL;
return (0);
}
int
pthread_attr_getguardsize(const pthread_attr_t *attrp, size_t *guardsize)
{
*guardsize = (*attrp)->guard_size;
return (0);
}
int
pthread_attr_setguardsize(pthread_attr_t *attrp, size_t guardsize)
{
if ((*attrp)->guard_size != guardsize) {
(*attrp)->stack_size += (*attrp)->guard_size;
(*attrp)->guard_size = guardsize;
(*attrp)->stack_size -= (*attrp)->guard_size;
}
return 0;
}
int
pthread_attr_getdetachstate(const pthread_attr_t *attrp, int *detachstate)
{
*detachstate = (*attrp)->detach_state;
return (0);
}
int
pthread_attr_setdetachstate(pthread_attr_t *attrp, int detachstate)
{
int retval;
retval = (detachstate == PTHREAD_CREATE_DETACHED ||
detachstate == PTHREAD_CREATE_JOINABLE) ? 0 : EINVAL;
if (retval == 0)
(*attrp)->detach_state = detachstate;
return (retval);
}
int
pthread_attr_getstack(const pthread_attr_t *attrp, void **stackaddr,
size_t *stacksize)
{
*stackaddr = (*attrp)->stack_addr;
*stacksize = (*attrp)->stack_size + (*attrp)->guard_size;
return (0);
}
int
pthread_attr_setstack(pthread_attr_t *attrp, void *stackaddr, size_t stacksize)
{
int n;
if ((n = pthread_attr_setstackaddr(attrp, stackaddr)))
return (n);
(*attrp)->stack_size = stacksize;
(*attrp)->stack_size -= (*attrp)->guard_size;
return (0);
}
int
pthread_attr_getstacksize(const pthread_attr_t *attrp, size_t *stacksize)
{
*stacksize = (*attrp)->stack_size + (*attrp)->guard_size;
return (0);
}
int
pthread_attr_setstacksize(pthread_attr_t *attrp, size_t stacksize)
{
(*attrp)->stack_size = stacksize;
if ((*attrp)->stack_size > (*attrp)->guard_size)
(*attrp)->stack_size -= (*attrp)->guard_size;
else
(*attrp)->stack_size = 0;
return (0);
}
int
pthread_attr_getstackaddr(const pthread_attr_t *attrp, void **stackaddr)
{
*stackaddr = (*attrp)->stack_addr;
return (0);
}
int
pthread_attr_setstackaddr(pthread_attr_t *attrp, void *stackaddr)
{
size_t pgsz = sysconf(_SC_PAGESIZE);
if (pgsz == (size_t)-1)
return EINVAL;
if ((uintptr_t)stackaddr & (pgsz - 1))
return EINVAL;
(*attrp)->stack_addr = stackaddr;
return (0);
}
int
pthread_attr_getscope(const pthread_attr_t *attrp, int *contentionscope)
{
*contentionscope = (*attrp)->contention_scope;
return (0);
}
int
pthread_attr_setscope(pthread_attr_t *attrp, int contentionscope)
{
/* XXX contentionscope should be validated here */
(*attrp)->contention_scope = contentionscope;
return (0);
}
int
pthread_attr_setcreatesuspend_np(pthread_attr_t *attr)
{
(*attr)->create_suspended = 1;
return (0);
}
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