pthread_md.h revision 319430 
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 * from: src/lib/libthr/arch/arm/include/pthread_md.h,v 1.3 2005/10/29 13:40:31 davidxu
27 * $FreeBSD: stable/11/lib/libthr/arch/mips/include/pthread_md.h 319430 2017-06-01 14:49:53Z vangyzen $
28 */
29
30/*
31 * Machine-dependent thread prototypes/definitions.
32 */
33#ifndef _PTHREAD_MD_H_
34#define	_PTHREAD_MD_H_
35
36#include <sys/types.h>
37#include <machine/sysarch.h>
38#include <machine/tls.h>
39#include <stddef.h>
40
41#define	CPU_SPINWAIT
42#define	DTV_OFFSET		offsetof(struct tcb, tcb_dtv)
43
44/*
45 * Variant I tcb. The structure layout is fixed, don't blindly
46 * change it!
47 */
48struct tcb {
49	void			*tcb_dtv;
50	struct pthread		*tcb_thread;
51};
52
53/* Called from the thread to set its private data. */
54static __inline void
55_tcb_set(struct tcb *tcb)
56{
57
58	sysarch(MIPS_SET_TLS, tcb);
59}
60
61/*
62 * Get the current tcb.
63 */
64static __inline struct tcb *
65_tcb_get(void)
66{
67	struct tcb *tcb;
68
69	sysarch(MIPS_GET_TLS, &tcb);
70	return tcb;
71}
72
73static __inline struct pthread *
74_get_curthread(void)
75{
76	if (_thr_initial)
77		return (_tcb_get()->tcb_thread);
78	return (NULL);
79}
80
81#endif /* _PTHREAD_MD_H_ */
82