1/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <string.h>
21#include <unistd.h>
22#include "pthreadP.h"
23
24#include <shlib-compat.h>
25
26
27struct pthread_attr *__attr_list;
28int __attr_list_lock = LLL_LOCK_INITIALIZER;
29
30
31int
32__pthread_attr_init (pthread_attr_t *attr)
33{
34 struct pthread_attr *iattr;
35
36 ASSERT_TYPE_SIZE (pthread_attr_t, __SIZEOF_PTHREAD_ATTR_T);
37 ASSERT_PTHREAD_INTERNAL_SIZE (pthread_attr_t, struct pthread_attr);
38
39 /* Many elements are initialized to zero so let us do it all at
40 once. This also takes care of clearing the bytes which are not
41 internally used. */
42 memset (attr, '\0', __SIZEOF_PTHREAD_ATTR_T);
43
44 iattr = (struct pthread_attr *) attr;
45
46 /* Default guard size specified by the standard. */
47 iattr->guardsize = __getpagesize ();
48
49 return 0;
50}
51libc_hidden_def (__pthread_attr_init)
52versioned_symbol (libc, __pthread_attr_init, pthread_attr_init, GLIBC_2_1);
53
54
55#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_1)
56int
57__pthread_attr_init_2_0 (pthread_attr_t *attr)
58{
59 /* This code is specific to the old LinuxThread code which has a too
60 small pthread_attr_t definition. The struct looked like
61 this: */
62 struct old_attr
63 {
64 int detachstate;
65 int schedpolicy;
66 struct sched_param schedparam;
67 int inheritsched;
68 int scope;
69 };
70 struct pthread_attr *iattr;
71
72 /* Many elements are initialized to zero so let us do it all at
73 once. This also takes care of clearing the bytes which are not
74 internally used. */
75 memset (attr, '\0', sizeof (struct old_attr));
76
77 iattr = (struct pthread_attr *) attr;
78 iattr->flags |= ATTR_FLAG_OLDATTR;
79
80 /* We cannot enqueue the attribute because that member is not in the
81 old attribute structure. */
82 return 0;
83}
84compat_symbol (libc, __pthread_attr_init_2_0, pthread_attr_init, GLIBC_2_0);
85#endif
86