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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/* Copyright (C) 2002-2022 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 <errno.h>
#include <stdlib.h>
#include "pthreadP.h"
#include <shlib-compat.h>
int
___pthread_setspecific (pthread_key_t key, const void *value)
{
struct pthread *self;
unsigned int idx1st;
unsigned int idx2nd;
struct pthread_key_data *level2;
unsigned int seq;
self = THREAD_SELF;
/* Special case access to the first 2nd-level block. This is the
usual case. */
if (__glibc_likely (key < PTHREAD_KEY_2NDLEVEL_SIZE))
{
/* Verify the key is sane. */
if (KEY_UNUSED ((seq = __pthread_keys[key].seq)))
/* Not valid. */
return EINVAL;
level2 = &self->specific_1stblock[key];
/* Remember that we stored at least one set of data. */
if (value != NULL)
THREAD_SETMEM (self, specific_used, true);
}
else
{
if (key >= PTHREAD_KEYS_MAX
|| KEY_UNUSED ((seq = __pthread_keys[key].seq)))
/* Not valid. */
return EINVAL;
idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
/* This is the second level array. Allocate it if necessary. */
level2 = THREAD_GETMEM_NC (self, specific, idx1st);
if (level2 == NULL)
{
if (value == NULL)
/* We don't have to do anything. The value would in any case
be NULL. We can save the memory allocation. */
return 0;
level2
= (struct pthread_key_data *) calloc (PTHREAD_KEY_2NDLEVEL_SIZE,
sizeof (*level2));
if (level2 == NULL)
return ENOMEM;
THREAD_SETMEM_NC (self, specific, idx1st, level2);
}
/* Pointer to the right array element. */
level2 = &level2[idx2nd];
/* Remember that we stored at least one set of data. */
THREAD_SETMEM (self, specific_used, true);
}
/* Store the data and the sequence number so that we can recognize
stale data. */
level2->seq = seq;
level2->data = (void *) value;
return 0;
}
versioned_symbol (libc, ___pthread_setspecific, pthread_setspecific,
GLIBC_2_34);
libc_hidden_ver (___pthread_setspecific, __pthread_setspecific)
#ifndef SHARED
strong_alias (___pthread_setspecific, __pthread_setspecific)
#endif
#if OTHER_SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_34)
compat_symbol (libpthread, ___pthread_setspecific, __pthread_setspecific,
GLIBC_2_0);
compat_symbol (libpthread, ___pthread_setspecific, pthread_setspecific,
GLIBC_2_0);
#endif
|
