/* $NetBSD: lib.c,v 1.1.4.2 2024/02/29 11:38:40 martin Exp $ */ /* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * SPDX-License-Identifier: MPL-2.0 * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ /*! \file */ #include #include #include #include #include #include #include #include #include #include #include #include #include /*** *** Globals ***/ LIBDNS_EXTERNAL_DATA unsigned int dns_pps = 0U; /*** *** Functions ***/ static isc_once_t init_once = ISC_ONCE_INIT; static isc_mem_t *dns_g_mctx = NULL; static dns_dbimplementation_t *dbimp = NULL; static bool initialize_done = false; static isc_refcount_t references; static void initialize(void) { isc_result_t result; REQUIRE(!initialize_done); isc_refcount_init(&references, 0); isc_mem_create(&dns_g_mctx); dns_result_register(); result = dns_ecdb_register(dns_g_mctx, &dbimp); if (result != ISC_R_SUCCESS) { goto cleanup_mctx; } result = dst_lib_init(dns_g_mctx, NULL); if (result != ISC_R_SUCCESS) { goto cleanup_db; } initialize_done = true; return; cleanup_db: if (dbimp != NULL) { dns_ecdb_unregister(&dbimp); } cleanup_mctx: if (dns_g_mctx != NULL) { isc_mem_detach(&dns_g_mctx); } } isc_result_t dns_lib_init(void) { isc_result_t result; /* * Since this routine is expected to be used by a normal application, * it should be better to return an error, instead of an emergency * abort, on any failure. */ result = isc_once_do(&init_once, initialize); if (result != ISC_R_SUCCESS) { return (result); } if (!initialize_done) { return (ISC_R_FAILURE); } isc_refcount_increment0(&references); return (ISC_R_SUCCESS); } void dns_lib_shutdown(void) { if (isc_refcount_decrement(&references) == 1) { dst_lib_destroy(); isc_refcount_destroy(&references); if (dbimp != NULL) { dns_ecdb_unregister(&dbimp); } if (dns_g_mctx != NULL) { isc_mem_detach(&dns_g_mctx); } } }