mirror of
https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-22 18:19:42 +00:00
122 lines
2.3 KiB
C
122 lines
2.3 KiB
C
/*
|
|
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
|
|
*
|
|
* 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 http://mozilla.org/MPL/2.0/.
|
|
*
|
|
* See the COPYRIGHT file distributed with this work for additional
|
|
* information regarding copyright ownership.
|
|
*/
|
|
|
|
/*! \file */
|
|
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
|
|
#include <isc/hash.h>
|
|
#include <isc/mem.h>
|
|
#include <isc/mutex.h>
|
|
#include <isc/once.h>
|
|
#include <isc/util.h>
|
|
|
|
#include <dns/db.h>
|
|
#include <dns/ecdb.h>
|
|
#include <dns/lib.h>
|
|
#include <dns/result.h>
|
|
|
|
#include <dst/dst.h>
|
|
|
|
|
|
/***
|
|
*** 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_mutex_t reflock;
|
|
static unsigned int references = 0;
|
|
|
|
static void
|
|
initialize(void) {
|
|
isc_result_t result;
|
|
|
|
REQUIRE(initialize_done == false);
|
|
|
|
result = isc_mem_create(0, 0, &dns_g_mctx);
|
|
if (result != ISC_R_SUCCESS)
|
|
return;
|
|
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;
|
|
|
|
isc_mutex_init(&reflock);
|
|
|
|
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);
|
|
|
|
LOCK(&reflock);
|
|
references++;
|
|
UNLOCK(&reflock);
|
|
|
|
return (ISC_R_SUCCESS);
|
|
}
|
|
|
|
void
|
|
dns_lib_shutdown(void) {
|
|
bool cleanup_ok = false;
|
|
|
|
LOCK(&reflock);
|
|
if (--references == 0)
|
|
cleanup_ok = true;
|
|
UNLOCK(&reflock);
|
|
|
|
if (!cleanup_ok)
|
|
return;
|
|
|
|
dst_lib_destroy();
|
|
|
|
if (dbimp != NULL)
|
|
dns_ecdb_unregister(&dbimp);
|
|
if (dns_g_mctx != NULL)
|
|
isc_mem_detach(&dns_g_mctx);
|
|
}
|