pthread_md.h revision 144765 
1/*-
2 * Copyright (c) 2005 David Xu <davidxu@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 *
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/arm/include/pthread_md.h 144765 2005-04-07 22:06:05Z cognet $
27 */
28
29/*
30 * Machine-dependent thread prototypes/definitions.
31 */
32#ifndef _PTHREAD_MD_H_
33#define	_PTHREAD_MD_H_
34
35#include <sys/types.h>
36#include <machine/sysarch.h>
37#include <stddef.h>
38#include <errno.h>
39
40#include <sys/umtx.h>
41
42#define	DTV_OFFSET		offsetof(struct tcb, tcb_dtv)
43
44/*
45 * Variant II tcb, first two members are required by rtld.
46 */
47struct tcb {
48	struct tcb              *tcb_self;	/* required by rtld */
49	void                    *tcb_dtv;	/* required by rtld */
50	struct pthread          *tcb_thread;	/* our hook */
51	void			*tcb_spare[1];
52};
53
54/*
55 * The tcb constructors.
56 */
57struct tcb	*_tcb_ctor(struct pthread *, int);
58void		_tcb_dtor(struct tcb *);
59
60/* Called from the thread to set its private data. */
61static __inline void
62_tcb_set(struct tcb *tcb)
63{
64	*((struct tcb **)ARM_TP_ADDRESS) = tcb;
65}
66
67/*
68 * Get the current tcb.
69 */
70static __inline struct tcb *
71_tcb_get(void)
72{
73	return (*((struct tcb **)ARM_TP_ADDRESS));
74}
75
76extern struct pthread *_thr_initial;
77
78static __inline struct pthread *
79_get_curthread(void)
80{
81	if (_thr_initial)
82		return (_tcb_get()->tcb_thread);
83	return (NULL);
84}
85
86extern struct umtx arm_umtx;
87
88#endif /* _PTHREAD_MD_H_ */
89