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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* This header file distributed under the terms of the CDDL.
* Portions Copyright 2008 Sun Microsystems, Inc. All Rights reserved.
*/
#ifndef _SYS_STACK_H
#define _SYS_STACK_H
#include <pthread.h>
#define STACK_BIAS 0
#ifdef __USE_GNU
static inline int
stack_getbounds(stack_t *sp)
{
pthread_attr_t attr;
int rc;
rc = pthread_getattr_np(pthread_self(), &attr);
if (rc)
return (rc);
rc = pthread_attr_getstack(&attr, &sp->ss_sp, &sp->ss_size);
if (rc == 0)
sp->ss_flags = 0;
pthread_attr_destroy(&attr);
return (rc);
}
static inline int
thr_stksegment(stack_t *sp)
{
int rc;
rc = stack_getbounds(sp);
if (rc)
return (rc);
/*
* thr_stksegment() is expected to set sp.ss_sp to the high stack
* address, but the stack_getbounds() interface is expected to
* set sp.ss_sp to the low address. Adjust accordingly.
*/
sp->ss_sp = (void *)(((uintptr_t)sp->ss_sp) + sp->ss_size);
sp->ss_flags = 0;
return (rc);
}
#endif /* __USE_GNU */
#endif /* _SYS_STACK_H */
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