Cleanup the TLS implementation:
[dragonfly.git] / lib / libthread_xu / arch / i386 / include / pthread_md.h
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1/*-
2 * Copyright (c) 2002 Daniel Eischen <deischen@freebsd.org>.
3 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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 AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: src/lib/libpthread/arch/i386/include/pthread_md.h,v 1.13 2004/11/06 03:35:51 peter Exp $
9e2ee207 28 * $DragonFly: src/lib/libthread_xu/arch/i386/include/pthread_md.h,v 1.5 2005/03/29 19:26:20 joerg Exp $
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29 */
30
31/*
32 * Machine-dependent thread prototypes/definitions for the thread kernel.
33 */
34#ifndef _PTHREAD_MD_H_
35#define _PTHREAD_MD_H_
36
37#include <stddef.h>
38#include <sys/types.h>
9e2ee207 39#include <machine/tls.h>
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40
41struct pthread;
42
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43static __inline int
44atomic_cmpset_int(volatile int *dst, int exp, int src)
45{
46 int res = exp;
47
48 __asm __volatile (
49 " lock cmpxchgl %1,%2 ; "
50 " setz %%al ; "
51 " movzbl %%al,%0 ; "
52 "1: "
53 "# atomic_cmpset_int"
54 : "+a" (res) /* 0 (result) */
55 : "r" (src), /* 1 */
56 "m" (*(dst)) /* 2 */
57 : "memory");
58
59 return (res);
60}
61
62#define atomic_cmpset_acq_int atomic_cmpset_int
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63
64/*
65 * The constructors.
66 */
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67struct tls_tcb *_tcb_ctor(struct pthread *, int);
68void _tcb_dtor(struct tls_tcb *tcb);
71b3fa15 69
71b3fa15 70#endif