1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/*
* Copyright (c) 1985 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)net_internal.c 6.22 (Berkeley) 3/19/91";*/
static char *rcsid = "$Id: net_internal.c,v 1.1 1998/07/21 13:19:46 peter Exp $";
#endif /* LIBC_SCCS and not lint */
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include "net_internal.h"
static void _net_init_global(void);
pthread_mutex_t net_iterate_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_once_t init_once = PTHREAD_ONCE_INIT;
static pthread_key_t key;
static int init_status;
/* Performs global initialization. */
char *_net_buf()
{
char *buf;
/* Make sure the global initializations have been done. */
pthread_once(&init_once, _net_init_global);
/* Initialize thread-specific data for this thread if it hasn't
* been done already. */
buf = (char *) pthread_getspecific(key);
if (!buf) {
buf = (char *) malloc(NET_BUFSIZE);
if (buf == NULL)
return NULL;
if (pthread_setspecific(key, buf) < 0) {
free(buf);
return NULL;
}
}
return buf;
}
static void _net_init_global()
{
init_status = pthread_key_create(&key, free);
}
|
