subr_lwp_specificdata.c revision 1.2.4.2
1 1.2.4.2 rmind /* $NetBSD: subr_lwp_specificdata.c,v 1.2.4.2 2010/05/30 05:17:58 rmind Exp $ */ 2 1.2.4.2 rmind 3 1.2.4.2 rmind /*- 4 1.2.4.2 rmind * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 1.2.4.2 rmind * All rights reserved. 6 1.2.4.2 rmind * 7 1.2.4.2 rmind * Redistribution and use in source and binary forms, with or without 8 1.2.4.2 rmind * modification, are permitted provided that the following conditions 9 1.2.4.2 rmind * are met: 10 1.2.4.2 rmind * 1. Redistributions of source code must retain the above copyright 11 1.2.4.2 rmind * notice, this list of conditions and the following disclaimer. 12 1.2.4.2 rmind * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.4.2 rmind * notice, this list of conditions and the following disclaimer in the 14 1.2.4.2 rmind * documentation and/or other materials provided with the distribution. 15 1.2.4.2 rmind * 16 1.2.4.2 rmind * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.2.4.2 rmind * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.2.4.2 rmind * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.2.4.2 rmind * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.2.4.2 rmind * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.2.4.2 rmind * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.2.4.2 rmind * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.2.4.2 rmind * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.2.4.2 rmind * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.2.4.2 rmind * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.2.4.2 rmind * POSSIBILITY OF SUCH DAMAGE. 27 1.2.4.2 rmind */ 28 1.2.4.2 rmind 29 1.2.4.2 rmind #define _LWP_API_PRIVATE 30 1.2.4.2 rmind 31 1.2.4.2 rmind #include <sys/cdefs.h> 32 1.2.4.2 rmind __KERNEL_RCSID(0, "$NetBSD: subr_lwp_specificdata.c,v 1.2.4.2 2010/05/30 05:17:58 rmind Exp $"); 33 1.2.4.2 rmind 34 1.2.4.2 rmind #include <sys/param.h> 35 1.2.4.2 rmind #include <sys/lwp.h> 36 1.2.4.2 rmind #include <sys/specificdata.h> 37 1.2.4.2 rmind 38 1.2.4.2 rmind static specificdata_domain_t lwp_specificdata_domain; 39 1.2.4.2 rmind 40 1.2.4.2 rmind void 41 1.2.4.2 rmind lwpinit_specificdata(void) 42 1.2.4.2 rmind { 43 1.2.4.2 rmind 44 1.2.4.2 rmind lwp_specificdata_domain = specificdata_domain_create(); 45 1.2.4.2 rmind KASSERT(lwp_specificdata_domain != NULL); 46 1.2.4.2 rmind } 47 1.2.4.2 rmind 48 1.2.4.2 rmind /* 49 1.2.4.2 rmind * lwp_specific_key_create -- 50 1.2.4.2 rmind * Create a key for subsystem lwp-specific data. 51 1.2.4.2 rmind */ 52 1.2.4.2 rmind int 53 1.2.4.2 rmind lwp_specific_key_create(specificdata_key_t *keyp, specificdata_dtor_t dtor) 54 1.2.4.2 rmind { 55 1.2.4.2 rmind 56 1.2.4.2 rmind return (specificdata_key_create(lwp_specificdata_domain, keyp, dtor)); 57 1.2.4.2 rmind } 58 1.2.4.2 rmind 59 1.2.4.2 rmind /* 60 1.2.4.2 rmind * lwp_specific_key_delete -- 61 1.2.4.2 rmind * Delete a key for subsystem lwp-specific data. 62 1.2.4.2 rmind */ 63 1.2.4.2 rmind void 64 1.2.4.2 rmind lwp_specific_key_delete(specificdata_key_t key) 65 1.2.4.2 rmind { 66 1.2.4.2 rmind 67 1.2.4.2 rmind specificdata_key_delete(lwp_specificdata_domain, key); 68 1.2.4.2 rmind } 69 1.2.4.2 rmind 70 1.2.4.2 rmind /* 71 1.2.4.2 rmind * lwp_initspecific -- 72 1.2.4.2 rmind * Initialize an LWP's specificdata container. 73 1.2.4.2 rmind */ 74 1.2.4.2 rmind void 75 1.2.4.2 rmind lwp_initspecific(struct lwp *l) 76 1.2.4.2 rmind { 77 1.2.4.2 rmind int error; 78 1.2.4.2 rmind 79 1.2.4.2 rmind error = specificdata_init(lwp_specificdata_domain, &l->l_specdataref); 80 1.2.4.2 rmind KASSERT(error == 0); 81 1.2.4.2 rmind } 82 1.2.4.2 rmind 83 1.2.4.2 rmind /* 84 1.2.4.2 rmind * lwp_finispecific -- 85 1.2.4.2 rmind * Finalize an LWP's specificdata container. 86 1.2.4.2 rmind */ 87 1.2.4.2 rmind void 88 1.2.4.2 rmind lwp_finispecific(struct lwp *l) 89 1.2.4.2 rmind { 90 1.2.4.2 rmind 91 1.2.4.2 rmind specificdata_fini(lwp_specificdata_domain, &l->l_specdataref); 92 1.2.4.2 rmind } 93 1.2.4.2 rmind 94 1.2.4.2 rmind /* 95 1.2.4.2 rmind * lwp_getspecific -- 96 1.2.4.2 rmind * Return lwp-specific data corresponding to the specified key. 97 1.2.4.2 rmind * 98 1.2.4.2 rmind * Note: LWP specific data is NOT INTERLOCKED. An LWP should access 99 1.2.4.2 rmind * only its OWN SPECIFIC DATA. If it is necessary to access another 100 1.2.4.2 rmind * LWP's specifc data, care must be taken to ensure that doing so 101 1.2.4.2 rmind * would not cause internal data structure inconsistency (i.e. caller 102 1.2.4.2 rmind * can guarantee that the target LWP is not inside an lwp_getspecific() 103 1.2.4.2 rmind * or lwp_setspecific() call). 104 1.2.4.2 rmind */ 105 1.2.4.2 rmind void * 106 1.2.4.2 rmind lwp_getspecific(specificdata_key_t key) 107 1.2.4.2 rmind { 108 1.2.4.2 rmind 109 1.2.4.2 rmind return (specificdata_getspecific_unlocked(lwp_specificdata_domain, 110 1.2.4.2 rmind &curlwp->l_specdataref, key)); 111 1.2.4.2 rmind } 112 1.2.4.2 rmind 113 1.2.4.2 rmind void * 114 1.2.4.2 rmind _lwp_getspecific_by_lwp(struct lwp *l, specificdata_key_t key) 115 1.2.4.2 rmind { 116 1.2.4.2 rmind 117 1.2.4.2 rmind return (specificdata_getspecific_unlocked(lwp_specificdata_domain, 118 1.2.4.2 rmind &l->l_specdataref, key)); 119 1.2.4.2 rmind } 120 1.2.4.2 rmind 121 1.2.4.2 rmind /* 122 1.2.4.2 rmind * lwp_setspecific -- 123 1.2.4.2 rmind * Set lwp-specific data corresponding to the specified key. 124 1.2.4.2 rmind */ 125 1.2.4.2 rmind void 126 1.2.4.2 rmind lwp_setspecific(specificdata_key_t key, void *data) 127 1.2.4.2 rmind { 128 1.2.4.2 rmind 129 1.2.4.2 rmind specificdata_setspecific(lwp_specificdata_domain, 130 1.2.4.2 rmind &curlwp->l_specdataref, key, data); 131 1.2.4.2 rmind } 132
Indexes created Sun Sep 21 20:09:37 GMT 2025