101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/****************************************************************************
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* libs/libc/netdb/lib_dnsinit.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <arpa/inet.h>
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#include <nuttx/sched.h>
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#include <nuttx/mutex.h>
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#include "netdb/lib_dns.h"
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* Protects DNS cache, nameserver list and notify list. */
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static rmutex_t g_dns_lock = NXRMUTEX_INITIALIZER;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: dns_lock
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*
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* Description:
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* Take the DNS lock, ignoring errors due to the receipt of signals.
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*
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****************************************************************************/
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void dns_lock(void)
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{
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nxrmutex_lock(&g_dns_lock);
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}
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/****************************************************************************
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* Name: dns_unlock
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*
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* Description:
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* Release the DNS lock
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*
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****************************************************************************/
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void dns_unlock(void)
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{
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nxrmutex_unlock(&g_dns_lock);
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}
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/****************************************************************************
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* Name: dns_breaklock
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*
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* Description:
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* Break the DNS lock
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****************************************************************************/
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void dns_breaklock(FAR unsigned int *count)
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{
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nxrmutex_breaklock(&g_dns_lock, count);
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}
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/****************************************************************************
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* Name: dns_restorelock
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*
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* Description:
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* Restore the DNS lock
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*
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****************************************************************************/
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void dns_restorelock(unsigned int count)
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{
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nxrmutex_restorelock(&g_dns_lock, count);
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}
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