subr_evcnt.c revision 1.4.94.2
1 /* $NetBSD: subr_evcnt.c,v 1.4.94.2 2011/02/05 06:54:58 cliff Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 2000 Christopher G. Demetriou 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the 18 * NetBSD Project. See http://www.NetBSD.org/ for 19 * information about NetBSD. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * --(license Id: LICENSE.proto,v 1.1 2000/06/13 21:40:26 cgd Exp )-- 35 */ 36 37 /* 38 * Copyright (c) 1992, 1993 39 * The Regents of the University of California. All rights reserved. 40 * 41 * This software was developed by the Computer Systems Engineering group 42 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 43 * contributed to Berkeley. 44 * 45 * All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Lawrence Berkeley Laboratories. 49 * 50 * Redistribution and use in source and binary forms, with or without 51 * modification, are permitted provided that the following conditions 52 * are met: 53 * 1. Redistributions of source code must retain the above copyright 54 * notice, this list of conditions and the following disclaimer. 55 * 2. Redistributions in binary form must reproduce the above copyright 56 * notice, this list of conditions and the following disclaimer in the 57 * documentation and/or other materials provided with the distribution. 58 * 3. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * from: Header: subr_autoconf.c,v 1.12 93/02/01 19:31:48 torek Exp (LBL) 75 * 76 * @(#)subr_autoconf.c 8.3 (Berkeley) 5/17/94 77 */ 78 79 #include <sys/cdefs.h> 80 __KERNEL_RCSID(0, "$NetBSD: subr_evcnt.c,v 1.4.94.2 2011/02/05 06:54:58 cliff Exp $"); 81 82 #include "opt_ddb.h" 83 84 #include <sys/param.h> 85 #include <sys/device.h> 86 #include <sys/mutex.h> 87 #include <sys/systm.h> 88 89 /* list of all events */ 90 struct evcntlist allevents = TAILQ_HEAD_INITIALIZER(allevents); 91 static kmutex_t evcnt_lock; 92 93 /* 94 * We need a dummy object to stuff into the evcnt link set to 95 * ensure that there always is at least one object in the set. 96 */ 97 static struct evcnt dummy_static_evcnt; 98 __link_set_add_bss(evcnts, dummy_static_evcnt); 99 100 /* 101 * Initialize event counters. This does the attach procedure for 102 * each of the static event counters in the "evcnts" link set. 103 */ 104 void 105 evcnt_init(void) 106 { 107 __link_set_decl(evcnts, struct evcnt); 108 struct evcnt * const *evp; 109 110 mutex_init(&evcnt_lock, MUTEX_DEFAULT, IPL_NONE); 111 112 __link_set_foreach(evp, evcnts) { 113 if (*evp == &dummy_static_evcnt) 114 continue; 115 evcnt_attach_static(*evp); 116 } 117 } 118 119 /* 120 * Attach a statically-initialized event. The type and string pointers 121 * are already set up. 122 */ 123 void 124 evcnt_attach_static(struct evcnt *ev) 125 { 126 int len; 127 128 len = strlen(ev->ev_group); 129 #ifdef DIAGNOSTIC 130 if (len >= EVCNT_STRING_MAX) /* ..._MAX includes NUL */ 131 panic("evcnt_attach_static: group length (%s)", ev->ev_group); 132 #endif 133 ev->ev_grouplen = len; 134 135 len = strlen(ev->ev_name); 136 #ifdef DIAGNOSTIC 137 if (len >= EVCNT_STRING_MAX) /* ..._MAX includes NUL */ 138 panic("evcnt_attach_static: name length (%s)", ev->ev_name); 139 #endif 140 ev->ev_namelen = len; 141 142 mutex_enter(&evcnt_lock); 143 TAILQ_INSERT_TAIL(&allevents, ev, ev_list); 144 mutex_exit(&evcnt_lock); 145 } 146 147 /* 148 * Attach a dynamically-initialized event. Zero it, set up the type 149 * and string pointers and then act like it was statically initialized. 150 */ 151 void 152 evcnt_attach_dynamic(struct evcnt *ev, int type, const struct evcnt *parent, 153 const char *group, const char *name) 154 { 155 156 memset(ev, 0, sizeof *ev); 157 ev->ev_type = type; 158 ev->ev_parent = parent; 159 ev->ev_group = group; 160 ev->ev_name = name; 161 evcnt_attach_static(ev); 162 } 163 164 /* 165 * Detach an event. 166 */ 167 void 168 evcnt_detach(struct evcnt *ev) 169 { 170 171 mutex_enter(&evcnt_lock); 172 TAILQ_REMOVE(&allevents, ev, ev_list); 173 mutex_exit(&evcnt_lock); 174 } 175 176 #ifdef DDB 177 void 178 event_print(int full, void (*pr)(const char *, ...)) 179 { 180 struct evcnt *evp; 181 182 TAILQ_FOREACH(evp, &allevents, ev_list) { 183 if (evp->ev_count == 0 && !full) 184 continue; 185 186 (*pr)("evcnt type %d: %s %s = %lld\n", evp->ev_type, 187 evp->ev_group, evp->ev_name, evp->ev_count); 188 } 189 } 190 #endif /* DDB */ 191
Indexes created Sat Sep 20 22:09:52 GMT 2025