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78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
/*
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* Copyright (c) 1985 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "from: @(#)proto_internal.c 6.22 (Berkeley) 3/19/91";*/
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static char *rcsid = "$Id$";
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#endif /* LIBC_SCCS and not lint */
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "proto_internal.h"
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static void _proto_init_global(void);
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pthread_mutex_t proto_iterate_lock = PTHREAD_MUTEX_INITIALIZER;
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static pthread_once_t init_once = PTHREAD_ONCE_INIT;
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static pthread_key_t key;
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static int init_status;
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/* Performs global initialization. */
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char *_proto_buf()
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{
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char *buf;
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/* Make sure the global initializations have been done. */
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pthread_once(&init_once, _proto_init_global);
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/* Initialize thread-specific data for this thread if it hasn't
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* been done already. */
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buf = (char *) pthread_getspecific(key);
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if (!buf) {
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buf = (char *) malloc(PROTO_BUFSIZE);
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if (buf == NULL)
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return NULL;
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if (pthread_setspecific(key, buf) < 0) {
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free(buf);
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return NULL;
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}
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}
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return buf;
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}
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static void _proto_init_global()
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{
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init_status = pthread_key_create(&key, free);
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}
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