pthread_md.h revision 118277 
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 118277 2003-07-31 21:09:11Z 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 <sys/kse.h>
35#include <ucontext.h>
36
37extern int _thr_setcontext(mcontext_t *, intptr_t, intptr_t *);
38extern int _thr_getcontext(mcontext_t *);
39
40#define	THR_GETCONTEXT(ucp)	_thr_getcontext(&(ucp)->uc_mcontext);
41#define	THR_SETCONTEXT(ucp)	_thr_setcontext(&(ucp)->uc_mcontext, NULL, NULL);
42
43#define	THR_ALIGNBYTES	15
44#define	THR_ALIGN(td)	(((unsigned)(td) + THR_ALIGNBYTES) & ~THR_ALIGNBYTES)
45
46/*
47 * KSE Specific Data.
48 */
49struct ksd {
50	int	ldt;
51#define	KSDF_INITIALIZED	0x01
52	long	flags;
53	void	*base;
54	long	size;
55};
56
57extern void _i386_enter_uts(struct kse_mailbox *, kse_func_t, void *, long);
58
59static __inline int
60_thread_enter_uts(struct kse_thr_mailbox *tmbx, struct kse_mailbox *kmbx)
61{
62	int ret;
63
64	ret = _thr_getcontext(&tmbx->tm_context.uc_mcontext);
65	if (ret == 0) {
66		_i386_enter_uts(kmbx, kmbx->km_func,
67		    kmbx->km_stack.ss_sp, kmbx->km_stack.ss_size);
68		/* We should not reach here. */
69		return (-1);
70	}
71	else if (ret < 0)
72		return (-1);
73	return (0);
74}
75
76static __inline int
77_thread_switch(struct kse_thr_mailbox *tmbx, struct kse_thr_mailbox **loc)
78{
79	_thr_setcontext(&tmbx->tm_context.uc_mcontext,
80	    (intptr_t)tmbx, (intptr_t *)loc);
81	/* We should not reach here. */
82	return (-1);
83}
84
85#endif
86