1/*	$NetBSD: pthread_specific.c,v 1.26 2013/03/21 16:49:12 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2001, 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Nathan J. Williams.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__RCSID("$NetBSD: pthread_specific.c,v 1.21.22.2 2012/12/02 18:47:36 riz Exp $");
34
35/* Functions and structures dealing with thread-specific data */
36
37#include "pthread.h"
38#include "pthread_int.h"
39#include "reentrant.h"
40
41#include <sys/lwpctl.h>
42
43__strong_alias(__libc_thr_setspecific,pthread_setspecific)
44__strong_alias(__libc_thr_getspecific,pthread_getspecific)
45__strong_alias(__libc_thr_curcpu,pthread_curcpu_np)
46
47int
48pthread_setspecific(pthread_key_t key, const void *value)
49{
50	pthread_t self;
51
52	if (__predict_false(__uselibcstub))
53		return __libc_thr_setspecific_stub(key, value);
54
55	self = pthread__self();
56	/*
57	 * We can't win here on constness. Having been given a
58	 * "const void *", we can only assign it to other const void *,
59	 * and return it from functions that are const void *, without
60	 * generating a warning.
61	 */
62	/*LINTED const cast*/
63	self->pt_specific[key] = (void *) value;
64	self->pt_havespecific = 1;
65
66	return 0;
67}
68
69void *
70pthread_getspecific(pthread_key_t key)
71{
72	if (__predict_false(__uselibcstub))
73		return __libc_thr_getspecific_stub(key);
74
75	return pthread__self()->pt_specific[key];
76}
77
78unsigned int
79pthread_curcpu_np(void)
80{
81	if (__predict_false(__uselibcstub))
82		return __libc_thr_curcpu_stub();
83
84	return pthread__self()->pt_lwpctl->lc_curcpu;
85}
86