blob: 4fb4fe0eb5e292bb276e63600661bed20f264290 (
plain) (
blame)
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
|
/* Copyright (c) 1998-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <unistd.h>
#include <stdlib.h>
#include <sys/time.h>
#include <libc-lock.h>
#include <rpc/rpc.h>
/* The RPC code is not threadsafe, but new code should be threadsafe. */
__libc_lock_define_initialized (static, createxid_lock)
static pid_t is_initialized;
static struct drand48_data __rpc_lrand48_data;
unsigned long
_create_xid (void)
{
long int res;
__libc_lock_lock (createxid_lock);
pid_t pid = getpid ();
if (is_initialized != pid)
{
struct timespec now;
__clock_gettime (CLOCK_REALTIME, &now);
__srand48_r (now.tv_sec ^ now.tv_nsec ^ pid,
&__rpc_lrand48_data);
is_initialized = pid;
}
lrand48_r (&__rpc_lrand48_data, &res);
__libc_lock_unlock (createxid_lock);
return res;
}
|
