1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <fmd_alloc.h> 30 #include <fmd_string.h> 31 #include <fmd_subr.h> 32 #include <fmd_buf.h> 33 #include <fmd.h> 34 35 static fmd_buf_t * 36 fmd_buf_alloc(const char *name, size_t size) 37 { 38 fmd_buf_t *bp = fmd_alloc(sizeof (fmd_buf_t), FMD_SLEEP); 39 40 bp->buf_name = fmd_strdup(name, FMD_SLEEP); 41 bp->buf_next = NULL; 42 bp->buf_data = fmd_zalloc(size, FMD_SLEEP); 43 bp->buf_size = size; 44 bp->buf_flags = FMD_BUF_DIRTY; 45 46 return (bp); 47 } 48 49 static void 50 fmd_buf_free(fmd_buf_t *bp) 51 { 52 fmd_strfree(bp->buf_name); 53 fmd_free(bp->buf_data, bp->buf_size); 54 fmd_free(bp, sizeof (fmd_buf_t)); 55 } 56 57 void 58 fmd_buf_hash_create(fmd_buf_hash_t *bhp) 59 { 60 bhp->bh_hashlen = fmd.d_str_buckets; 61 bhp->bh_hash = fmd_zalloc(sizeof (void *) * bhp->bh_hashlen, FMD_SLEEP); 62 bhp->bh_count = 0; 63 } 64 65 void 66 fmd_buf_hash_destroy(fmd_buf_hash_t *bhp) 67 { 68 fmd_buf_t *bp, *np; 69 uint_t i; 70 71 for (i = 0; i < bhp->bh_hashlen; i++) { 72 for (bp = bhp->bh_hash[i]; bp != NULL; bp = np) { 73 np = bp->buf_next; 74 fmd_buf_free(bp); 75 } 76 } 77 78 fmd_free(bhp->bh_hash, sizeof (void *) * bhp->bh_hashlen); 79 bzero(bhp, sizeof (fmd_buf_hash_t)); 80 } 81 82 void 83 fmd_buf_hash_apply(fmd_buf_hash_t *bhp, fmd_buf_f *func, void *arg) 84 { 85 fmd_buf_t *bp; 86 uint_t i; 87 88 for (i = 0; i < bhp->bh_hashlen; i++) { 89 for (bp = bhp->bh_hash[i]; bp != NULL; bp = bp->buf_next) 90 func(bp, arg); 91 } 92 } 93 94 void 95 fmd_buf_hash_commit(fmd_buf_hash_t *bhp) 96 { 97 fmd_buf_t *bp; 98 uint_t i; 99 100 for (i = 0; i < bhp->bh_hashlen; i++) { 101 for (bp = bhp->bh_hash[i]; bp != NULL; bp = bp->buf_next) 102 bp->buf_flags &= ~FMD_BUF_DIRTY; 103 } 104 } 105 106 uint_t 107 fmd_buf_hash_count(fmd_buf_hash_t *bhp) 108 { 109 return (bhp->bh_count); 110 } 111 112 fmd_buf_t * 113 fmd_buf_insert(fmd_buf_hash_t *bhp, const char *name, size_t size) 114 { 115 uint_t h = fmd_strhash(name) % bhp->bh_hashlen; 116 fmd_buf_t *bp = fmd_buf_alloc(name, size); 117 118 bp->buf_next = bhp->bh_hash[h]; 119 bhp->bh_hash[h] = bp; 120 bhp->bh_count++; 121 122 return (bp); 123 } 124 125 fmd_buf_t * 126 fmd_buf_lookup(fmd_buf_hash_t *bhp, const char *name) 127 { 128 uint_t h = fmd_strhash(name) % bhp->bh_hashlen; 129 fmd_buf_t *bp; 130 131 for (bp = bhp->bh_hash[h]; bp != NULL; bp = bp->buf_next) { 132 if (strcmp(name, bp->buf_name) == 0) 133 return (bp); 134 } 135 136 return (NULL); 137 } 138 139 void 140 fmd_buf_delete(fmd_buf_hash_t *bhp, const char *name) 141 { 142 uint_t h = fmd_strhash(name) % bhp->bh_hashlen; 143 fmd_buf_t *bp, **pp = &bhp->bh_hash[h]; 144 145 for (bp = *pp; bp != NULL; bp = bp->buf_next) { 146 if (strcmp(bp->buf_name, name) != 0) 147 pp = &bp->buf_next; 148 else 149 break; 150 } 151 152 if (bp != NULL) { 153 *pp = bp->buf_next; 154 fmd_buf_free(bp); 155 ASSERT(bhp->bh_count != 0); 156 bhp->bh_count--; 157 } 158 } 159