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