1 /* $NetBSD: stats.c,v 1.8 2025/01/26 16:25:46 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * SPDX-License-Identifier: MPL-2.0 7 * 8 * This Source Code Form is subject to the terms of the Mozilla Public 9 * License, v. 2.0. If a copy of the MPL was not distributed with this 10 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 11 * 12 * See the COPYRIGHT file distributed with this work for additional 13 * information regarding copyright ownership. 14 */ 15 16 /*! \file */ 17 18 #include <isc/magic.h> 19 #include <isc/mem.h> 20 #include <isc/refcount.h> 21 #include <isc/stats.h> 22 #include <isc/util.h> 23 24 #include <ns/stats.h> 25 26 #define NS_STATS_MAGIC ISC_MAGIC('N', 's', 't', 't') 27 #define NS_STATS_VALID(x) ISC_MAGIC_VALID(x, NS_STATS_MAGIC) 28 29 struct ns_stats { 30 /*% Unlocked */ 31 unsigned int magic; 32 isc_mem_t *mctx; 33 isc_stats_t *counters; 34 isc_refcount_t references; 35 }; 36 37 void 38 ns_stats_attach(ns_stats_t *stats, ns_stats_t **statsp) { 39 REQUIRE(NS_STATS_VALID(stats)); 40 REQUIRE(statsp != NULL && *statsp == NULL); 41 42 isc_refcount_increment(&stats->references); 43 44 *statsp = stats; 45 } 46 47 void 48 ns_stats_detach(ns_stats_t **statsp) { 49 ns_stats_t *stats; 50 51 REQUIRE(statsp != NULL && NS_STATS_VALID(*statsp)); 52 53 stats = *statsp; 54 *statsp = NULL; 55 56 if (isc_refcount_decrement(&stats->references) == 1) { 57 isc_stats_detach(&stats->counters); 58 isc_refcount_destroy(&stats->references); 59 isc_mem_putanddetach(&stats->mctx, stats, sizeof(*stats)); 60 } 61 } 62 63 void 64 ns_stats_create(isc_mem_t *mctx, int ncounters, ns_stats_t **statsp) { 65 REQUIRE(statsp != NULL && *statsp == NULL); 66 67 ns_stats_t *stats = isc_mem_get(mctx, sizeof(*stats)); 68 stats->counters = NULL; 69 70 isc_refcount_init(&stats->references, 1); 71 72 isc_stats_create(mctx, &stats->counters, ncounters); 73 74 stats->magic = NS_STATS_MAGIC; 75 stats->mctx = NULL; 76 isc_mem_attach(mctx, &stats->mctx); 77 *statsp = stats; 78 } 79 80 /*% 81 * Increment/Decrement methods 82 */ 83 isc_statscounter_t 84 ns_stats_increment(ns_stats_t *stats, isc_statscounter_t counter) { 85 REQUIRE(NS_STATS_VALID(stats)); 86 87 return isc_stats_increment(stats->counters, counter); 88 } 89 90 void 91 ns_stats_decrement(ns_stats_t *stats, isc_statscounter_t counter) { 92 REQUIRE(NS_STATS_VALID(stats)); 93 94 isc_stats_decrement(stats->counters, counter); 95 } 96 97 isc_stats_t * 98 ns_stats_get(ns_stats_t *stats) { 99 REQUIRE(NS_STATS_VALID(stats)); 100 101 return stats->counters; 102 } 103 104 void 105 ns_stats_update_if_greater(ns_stats_t *stats, isc_statscounter_t counter, 106 isc_statscounter_t value) { 107 REQUIRE(NS_STATS_VALID(stats)); 108 109 isc_stats_update_if_greater(stats->counters, counter, value); 110 } 111 112 isc_statscounter_t 113 ns_stats_get_counter(ns_stats_t *stats, isc_statscounter_t counter) { 114 REQUIRE(NS_STATS_VALID(stats)); 115 116 return isc_stats_get_counter(stats->counters, counter); 117 } 118