pthread_md.h revision 113661 
1/*-
2 * Copyright (c) 2002 Daniel Eischen <deischen@freebsd.org>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/lib/libkse/arch/i386/include/pthread_md.h 113661 2003-04-18 07:09:43Z deischen $
27 */
28/*
29 * Machine-dependent thread prototypes/definitions for the thread kernel.
30 */
31#ifndef _PTHREAD_MD_H_
32#define	_PTHREAD_MD_H_
33
34#include <setjmp.h>
35#include <ucontext.h>
36
37extern int _thr_setcontext(ucontext_t *);
38extern int _thr_getcontext(ucontext_t *);
39
40/*
41 * These are needed to ensure an application doesn't attempt to jump
42 * between stacks of different threads.  They return the stack of
43 * jmp_buf, sigjmp_buf, and ucontext respectively.
44 */
45#define	GET_STACK_JB(jb)	((unsigned long)((jb)[0]._jb[2]))
46#define	GET_STACK_SJB(sjb)	((unsigned long)((sjb)[0]._sjb[2]))
47#define	GET_STACK_UC(ucp)	((unsigned long)((ucp)->uc_mcontext.mc_esp))
48
49#define	THR_GETCONTEXT(ucp)	_thr_getcontext(ucp)
50#define	THR_SETCONTEXT(ucp)	_thr_setcontext(ucp)
51#endif
52