pthread_md.h revision 161840 
1/*
2 * Copyright (c) 2003 Marcel Moolenaar
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: head/lib/libthr/arch/ia64/include/pthread_md.h 161840 2006-09-01 21:01:11Z marcel $
27 */
28
29#ifndef _PTHREAD_MD_H_
30#define	_PTHREAD_MD_H_
31
32#include <stddef.h>
33
34#define	DTV_OFFSET		offsetof(struct tcb, tcb_dtv)
35
36/*
37 * Variant I tcb. The structure layout is fixed, don't blindly
38 * change it!
39 */
40struct tcb {
41	void			*tcb_dtv;
42	struct pthread		*tcb_thread;
43};
44
45/*
46 * The tcb constructors.
47 */
48struct tcb	*_tcb_ctor(struct pthread *, int);
49void		_tcb_dtor(struct tcb *);
50
51/* Called from the thread to set its private data. */
52static __inline void
53_tcb_set(struct tcb *tcb)
54{
55	register struct tcb *tp __asm("%r13");
56
57	__asm __volatile("mov %0 = %1;;" : "=r"(tp) : "r"(tcb));
58}
59
60static __inline struct tcb *
61_tcb_get(void)
62{
63	register struct tcb *tp __asm("%r13");
64
65	return (tp);
66}
67
68extern struct pthread *_thr_initial;
69
70static __inline struct pthread *
71_get_curthread(void)
72{
73	if (_thr_initial)
74		return (_tcb_get()->tcb_thread);
75	return (NULL);
76}
77
78#endif /* _PTHREAD_MD_H_ */
79