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d4697bc9 | 1 | /* Copyright (C) 2002-2014 Free Software Foundation, Inc. |
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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 <errno.h> | |
20 | #include "pthreadP.h" | |
21 | #include <lowlevellock.h> | |
22 | ||
23 | ||
24 | int | |
c93c5dec | 25 | __pthread_rwlock_trywrlock (pthread_rwlock_t *rwlock) |
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26 | { |
27 | int result = EBUSY; | |
28 | ||
e51deae7 | 29 | lll_lock (rwlock->__data.__lock, rwlock->__data.__shared); |
76a50749 | 30 | |
b80770b2 | 31 | if (rwlock->__data.__writer == 0 && rwlock->__data.__nr_readers == 0) |
76a50749 | 32 | { |
4ad0bbf4 | 33 | rwlock->__data.__writer = THREAD_GETMEM (THREAD_SELF, tid); |
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34 | result = 0; |
35 | } | |
36 | ||
e51deae7 | 37 | lll_unlock (rwlock->__data.__lock, rwlock->__data.__shared); |
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38 | |
39 | return result; | |
40 | } | |
41 | strong_alias (__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock) |