1 /* $NetBSD: pthread_specific.c,v 1.20 2008/04/28 20:23:01 martin 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 1.20 2008/04/28 20:23:01 martin Exp $"); 34 35 /* Functions and structures dealing with thread-specific data */ 36 37 #include "pthread.h" 38 #include "pthread_int.h" 39 40 #include <sys/lwpctl.h> 41 42 __strong_alias(__libc_thr_setspecific,pthread_setspecific) 43 __strong_alias(__libc_thr_getspecific,pthread_getspecific) 44 __strong_alias(__libc_thr_curcpu,pthread_curcpu_np) 45 46 int 47 pthread_setspecific(pthread_key_t key, const void *value) 48 { 49 pthread_t self; 50 51 self = pthread__self(); 52 /* 53 * We can't win here on constness. Having been given a 54 * "const void *", we can only assign it to other const void *, 55 * and return it from functions that are const void *, without 56 * generating a warning. 57 */ 58 /*LINTED const cast*/ 59 self->pt_specific[key] = (void *) value; 60 self->pt_havespecific = 1; 61 62 return 0; 63 } 64 65 void * 66 pthread_getspecific(pthread_key_t key) 67 { 68 69 return pthread__self()->pt_specific[key]; 70 } 71 72 unsigned int 73 pthread_curcpu_np(void) 74 { 75 unsigned int cpu = pthread__self()->pt_lwpctl->lc_curcpu; 76 77 /* for pthread__dummy_lwpctl */ 78 if (cpu == (unsigned int)LWPCTL_CPU_NONE) 79 return 0; 80 81 return cpu; 82 } 83