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https://gitlab.isc.org/isc-projects/bind9
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84 lines
1.6 KiB
C
84 lines
1.6 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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/*! \file */
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#include <stdbool.h>
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#include <stddef.h>
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#include <isc/mem.h>
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#include <isc/mutex.h>
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#include <isc/once.h>
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#include <isc/refcount.h>
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#include <isc/util.h>
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#include <dns/name.h>
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#include <ns/lib.h>
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/***
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*** Globals
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***/
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LIBNS_EXTERNAL_DATA unsigned int ns_pps = 0U;
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/***
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*** Private
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***/
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static isc_once_t init_once = ISC_ONCE_INIT;
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static isc_mem_t *ns_g_mctx = NULL;
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static bool initialize_done = false;
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static isc_refcount_t references;
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static void
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initialize(void) {
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REQUIRE(initialize_done == false);
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isc_mem_create(&ns_g_mctx);
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isc_refcount_init(&references, 0);
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initialize_done = true;
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return;
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}
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isc_result_t
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ns_lib_init(void) {
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isc_result_t result;
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/*
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* Since this routine is expected to be used by a normal application,
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* it should be better to return an error, instead of an emergency
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* abort, on any failure.
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*/
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result = isc_once_do(&init_once, initialize);
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if (result != ISC_R_SUCCESS)
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return (result);
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if (!initialize_done)
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return (ISC_R_FAILURE);
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isc_refcount_increment(&references);
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return (ISC_R_SUCCESS);
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}
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void
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ns_lib_shutdown(void) {
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if (isc_refcount_decrement(&references) == 1) {
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if (ns_g_mctx != NULL) {
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isc_mem_detach(&ns_g_mctx);
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}
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}
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}
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