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bfff8b1b | 1 | /* Copyright (C) 2002-2017 Free Software Foundation, Inc. |
76a50749 UD |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #include "pthreadP.h" | |
c71ca1f8 | 20 | #include <string.h> |
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21 | |
22 | ||
69854bb5 | 23 | static const struct pthread_rwlockattr default_rwlockattr = |
76a50749 UD |
24 | { |
25 | .lockkind = PTHREAD_RWLOCK_DEFAULT_NP, | |
26 | .pshared = PTHREAD_PROCESS_PRIVATE | |
27 | }; | |
28 | ||
29 | ||
cc25c8b4 | 30 | /* See pthread_rwlock_common.c. */ |
76a50749 | 31 | int |
f63f2bfd JM |
32 | __pthread_rwlock_init (pthread_rwlock_t *rwlock, |
33 | const pthread_rwlockattr_t *attr) | |
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34 | { |
35 | const struct pthread_rwlockattr *iattr; | |
36 | ||
69854bb5 | 37 | iattr = ((const struct pthread_rwlockattr *) attr) ?: &default_rwlockattr; |
76a50749 | 38 | |
f01c2359 | 39 | memset (rwlock, '\0', sizeof (*rwlock)); |
e59660bc | 40 | |
cc25c8b4 | 41 | rwlock->__data.__flags = iattr->lockkind; |
e59660bc | 42 | |
cc25c8b4 TR |
43 | /* The value of __SHARED in a private rwlock must be zero. */ |
44 | rwlock->__data.__shared = (iattr->pshared != PTHREAD_PROCESS_PRIVATE); | |
e59660bc | 45 | |
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46 | return 0; |
47 | } | |
48 | strong_alias (__pthread_rwlock_init, pthread_rwlock_init) |