subr_lwp_specificdata.c revision 1.2.6.2
1 1.2.6.2 yamt /* $NetBSD: subr_lwp_specificdata.c,v 1.2.6.2 2010/08/11 22:54:42 yamt Exp $ */ 2 1.2.6.2 yamt 3 1.2.6.2 yamt /*- 4 1.2.6.2 yamt * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 1.2.6.2 yamt * All rights reserved. 6 1.2.6.2 yamt * 7 1.2.6.2 yamt * Redistribution and use in source and binary forms, with or without 8 1.2.6.2 yamt * modification, are permitted provided that the following conditions 9 1.2.6.2 yamt * are met: 10 1.2.6.2 yamt * 1. Redistributions of source code must retain the above copyright 11 1.2.6.2 yamt * notice, this list of conditions and the following disclaimer. 12 1.2.6.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.6.2 yamt * notice, this list of conditions and the following disclaimer in the 14 1.2.6.2 yamt * documentation and/or other materials provided with the distribution. 15 1.2.6.2 yamt * 16 1.2.6.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.2.6.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.2.6.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.2.6.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.2.6.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.2.6.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.2.6.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.2.6.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.2.6.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.2.6.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.2.6.2 yamt * POSSIBILITY OF SUCH DAMAGE. 27 1.2.6.2 yamt */ 28 1.2.6.2 yamt 29 1.2.6.2 yamt #define _LWP_API_PRIVATE 30 1.2.6.2 yamt 31 1.2.6.2 yamt #include <sys/cdefs.h> 32 1.2.6.2 yamt __KERNEL_RCSID(0, "$NetBSD: subr_lwp_specificdata.c,v 1.2.6.2 2010/08/11 22:54:42 yamt Exp $"); 33 1.2.6.2 yamt 34 1.2.6.2 yamt #include <sys/param.h> 35 1.2.6.2 yamt #include <sys/lwp.h> 36 1.2.6.2 yamt #include <sys/specificdata.h> 37 1.2.6.2 yamt 38 1.2.6.2 yamt static specificdata_domain_t lwp_specificdata_domain; 39 1.2.6.2 yamt 40 1.2.6.2 yamt void 41 1.2.6.2 yamt lwpinit_specificdata(void) 42 1.2.6.2 yamt { 43 1.2.6.2 yamt 44 1.2.6.2 yamt lwp_specificdata_domain = specificdata_domain_create(); 45 1.2.6.2 yamt KASSERT(lwp_specificdata_domain != NULL); 46 1.2.6.2 yamt } 47 1.2.6.2 yamt 48 1.2.6.2 yamt /* 49 1.2.6.2 yamt * lwp_specific_key_create -- 50 1.2.6.2 yamt * Create a key for subsystem lwp-specific data. 51 1.2.6.2 yamt */ 52 1.2.6.2 yamt int 53 1.2.6.2 yamt lwp_specific_key_create(specificdata_key_t *keyp, specificdata_dtor_t dtor) 54 1.2.6.2 yamt { 55 1.2.6.2 yamt 56 1.2.6.2 yamt return (specificdata_key_create(lwp_specificdata_domain, keyp, dtor)); 57 1.2.6.2 yamt } 58 1.2.6.2 yamt 59 1.2.6.2 yamt /* 60 1.2.6.2 yamt * lwp_specific_key_delete -- 61 1.2.6.2 yamt * Delete a key for subsystem lwp-specific data. 62 1.2.6.2 yamt */ 63 1.2.6.2 yamt void 64 1.2.6.2 yamt lwp_specific_key_delete(specificdata_key_t key) 65 1.2.6.2 yamt { 66 1.2.6.2 yamt 67 1.2.6.2 yamt specificdata_key_delete(lwp_specificdata_domain, key); 68 1.2.6.2 yamt } 69 1.2.6.2 yamt 70 1.2.6.2 yamt /* 71 1.2.6.2 yamt * lwp_initspecific -- 72 1.2.6.2 yamt * Initialize an LWP's specificdata container. 73 1.2.6.2 yamt */ 74 1.2.6.2 yamt void 75 1.2.6.2 yamt lwp_initspecific(struct lwp *l) 76 1.2.6.2 yamt { 77 1.2.6.2 yamt int error; 78 1.2.6.2 yamt 79 1.2.6.2 yamt error = specificdata_init(lwp_specificdata_domain, &l->l_specdataref); 80 1.2.6.2 yamt KASSERT(error == 0); 81 1.2.6.2 yamt } 82 1.2.6.2 yamt 83 1.2.6.2 yamt /* 84 1.2.6.2 yamt * lwp_finispecific -- 85 1.2.6.2 yamt * Finalize an LWP's specificdata container. 86 1.2.6.2 yamt */ 87 1.2.6.2 yamt void 88 1.2.6.2 yamt lwp_finispecific(struct lwp *l) 89 1.2.6.2 yamt { 90 1.2.6.2 yamt 91 1.2.6.2 yamt specificdata_fini(lwp_specificdata_domain, &l->l_specdataref); 92 1.2.6.2 yamt } 93 1.2.6.2 yamt 94 1.2.6.2 yamt /* 95 1.2.6.2 yamt * lwp_getspecific -- 96 1.2.6.2 yamt * Return lwp-specific data corresponding to the specified key. 97 1.2.6.2 yamt * 98 1.2.6.2 yamt * Note: LWP specific data is NOT INTERLOCKED. An LWP should access 99 1.2.6.2 yamt * only its OWN SPECIFIC DATA. If it is necessary to access another 100 1.2.6.2 yamt * LWP's specifc data, care must be taken to ensure that doing so 101 1.2.6.2 yamt * would not cause internal data structure inconsistency (i.e. caller 102 1.2.6.2 yamt * can guarantee that the target LWP is not inside an lwp_getspecific() 103 1.2.6.2 yamt * or lwp_setspecific() call). 104 1.2.6.2 yamt */ 105 1.2.6.2 yamt void * 106 1.2.6.2 yamt lwp_getspecific(specificdata_key_t key) 107 1.2.6.2 yamt { 108 1.2.6.2 yamt 109 1.2.6.2 yamt return (specificdata_getspecific_unlocked(lwp_specificdata_domain, 110 1.2.6.2 yamt &curlwp->l_specdataref, key)); 111 1.2.6.2 yamt } 112 1.2.6.2 yamt 113 1.2.6.2 yamt void * 114 1.2.6.2 yamt _lwp_getspecific_by_lwp(struct lwp *l, specificdata_key_t key) 115 1.2.6.2 yamt { 116 1.2.6.2 yamt 117 1.2.6.2 yamt return (specificdata_getspecific_unlocked(lwp_specificdata_domain, 118 1.2.6.2 yamt &l->l_specdataref, key)); 119 1.2.6.2 yamt } 120 1.2.6.2 yamt 121 1.2.6.2 yamt /* 122 1.2.6.2 yamt * lwp_setspecific -- 123 1.2.6.2 yamt * Set lwp-specific data corresponding to the specified key. 124 1.2.6.2 yamt */ 125 1.2.6.2 yamt void 126 1.2.6.2 yamt lwp_setspecific(specificdata_key_t key, void *data) 127 1.2.6.2 yamt { 128 1.2.6.2 yamt 129 1.2.6.2 yamt specificdata_setspecific(lwp_specificdata_domain, 130 1.2.6.2 yamt &curlwp->l_specdataref, key, data); 131 1.2.6.2 yamt } 132
Indexes created Tue Sep 23 07:09:52 GMT 2025