1/* $NetBSD: subr_lwp_specificdata.c,v 1.1 2010/04/12 22:15:31 pooka Exp $ */ 2 3/*- 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#define _LWP_API_PRIVATE 30 31#include <sys/cdefs.h> 32__KERNEL_RCSID(0, "$NetBSD: subr_lwp_specificdata.c,v 1.1 2010/04/12 22:15:31 pooka Exp $"); 33 34#include <sys/param.h> 35#include <sys/lwp.h> 36#include <sys/specificdata.h> 37 38static specificdata_domain_t lwp_specificdata_domain; 39 40void 41lwpinit_specificdata(void) 42{ 43 44 lwp_specificdata_domain = specificdata_domain_create(); 45 KASSERT(lwp_specificdata_domain != NULL); 46} 47 48/* 49 * lwp_specific_key_create -- 50 * Create a key for subsystem lwp-specific data. 51 */ 52int 53lwp_specific_key_create(specificdata_key_t *keyp, specificdata_dtor_t dtor) 54{ 55 56 return (specificdata_key_create(lwp_specificdata_domain, keyp, dtor)); 57} 58 59/* 60 * lwp_specific_key_delete -- 61 * Delete a key for subsystem lwp-specific data. 62 */ 63void 64lwp_specific_key_delete(specificdata_key_t key) 65{ 66 67 specificdata_key_delete(lwp_specificdata_domain, key); 68} 69 70/* 71 * lwp_initspecific -- 72 * Initialize an LWP's specificdata container. 73 */ 74void 75lwp_initspecific(struct lwp *l) 76{ 77 int error; 78 79 error = specificdata_init(lwp_specificdata_domain, &l->l_specdataref); 80 KASSERT(error == 0); 81} 82 83/* 84 * lwp_finispecific -- 85 * Finalize an LWP's specificdata container. 86 */ 87void 88lwp_finispecific(struct lwp *l) 89{ 90 91 specificdata_fini(lwp_specificdata_domain, &l->l_specdataref); 92} 93 94/* 95 * lwp_getspecific -- 96 * Return lwp-specific data corresponding to the specified key. 97 * 98 * Note: LWP specific data is NOT INTERLOCKED. An LWP should access 99 * only its OWN SPECIFIC DATA. If it is necessary to access another 100 * LWP's specifc data, care must be taken to ensure that doing so 101 * would not cause internal data structure inconsistency (i.e. caller 102 * can guarantee that the target LWP is not inside an lwp_getspecific() 103 * or lwp_setspecific() call). 104 */ 105void * 106lwp_getspecific(specificdata_key_t key) 107{ 108 109 return (specificdata_getspecific_unlocked(lwp_specificdata_domain, 110 &curlwp->l_specdataref, key)); 111} 112 113void * 114_lwp_getspecific_by_lwp(struct lwp *l, specificdata_key_t key) 115{ 116 117 return (specificdata_getspecific_unlocked(lwp_specificdata_domain, 118 &l->l_specdataref, key)); 119} 120 121/* 122 * lwp_setspecific -- 123 * Set lwp-specific data corresponding to the specified key. 124 */ 125void 126lwp_setspecific(specificdata_key_t key, void *data) 127{ 128 129 specificdata_setspecific(lwp_specificdata_domain, 130 &curlwp->l_specdataref, key, data); 131} 132