1/* Copyright (C) 2002-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <string.h>
20#include <unistd.h>
21#include "pthreadP.h"
22
23#include <shlib-compat.h>
24
25
26struct pthread_attr *__attr_list;
27int __attr_list_lock = LLL_LOCK_INITIALIZER;
28
29
30int
31__pthread_attr_init (pthread_attr_t *attr)
32{
33 struct pthread_attr *iattr;
34
35 ASSERT_TYPE_SIZE (pthread_attr_t, __SIZEOF_PTHREAD_ATTR_T);
36 ASSERT_PTHREAD_INTERNAL_SIZE (pthread_attr_t, struct pthread_attr);
37
38 /* Many elements are initialized to zero so let us do it all at
39 once. This also takes care of clearing the bytes which are not
40 internally used. */
41 memset (attr, '\0', __SIZEOF_PTHREAD_ATTR_T);
42
43 iattr = (struct pthread_attr *) attr;
44
45 /* Default guard size specified by the standard. */
46 iattr->guardsize = __getpagesize ();
47
48 return 0;
49}
50libc_hidden_def (__pthread_attr_init)
51versioned_symbol (libc, __pthread_attr_init, pthread_attr_init, GLIBC_2_1);
52
53
54#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_1)
55int
56__pthread_attr_init_2_0 (pthread_attr_t *attr)
57{
58 /* This code is specific to the old LinuxThread code which has a too
59 small pthread_attr_t definition. The struct looked like
60 this: */
61 struct old_attr
62 {
63 int detachstate;
64 int schedpolicy;
65 struct sched_param schedparam;
66 int inheritsched;
67 int scope;
68 };
69 struct pthread_attr *iattr;
70
71 /* Many elements are initialized to zero so let us do it all at
72 once. This also takes care of clearing the bytes which are not
73 internally used. */
74 memset (attr, '\0', sizeof (struct old_attr));
75
76 iattr = (struct pthread_attr *) attr;
77 iattr->flags |= ATTR_FLAG_OLDATTR;
78
79 /* We cannot enqueue the attribute because that member is not in the
80 old attribute structure. */
81 return 0;
82}
83compat_symbol (libc, __pthread_attr_init_2_0, pthread_attr_init, GLIBC_2_0);
84#endif
85