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
|
/* Copyright (c) 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <unistd.h>
#include <stdlib.h>
#include <sys/time.h>
#include <bits/libc-lock.h>
/* The RPC code is not threadsafe, but new code should be threadsafe. */
__libc_lock_define_initialized (static, createxid_lock)
static int is_initialized;
static struct drand48_data __rpc_lrand48_data;
unsigned long
_create_xid (void)
{
unsigned long res;
__libc_lock_lock (createxid_lock);
if (!is_initialized)
{
struct timeval now;
__gettimeofday (&now, (struct timezone *) 0);
srand48_r (now.tv_sec ^ now.tv_usec, &__rpc_lrand48_data);
is_initialized = 1;
}
lrand48_r (&__rpc_lrand48_data, &res);
__libc_lock_unlock (createxid_lock);
return res;
}
|
GitWeb
