1 /* Copyright (C) 2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 #include <lowlevellock.h>
26 __pthread_mutex_trylock (mutex
)
27 pthread_mutex_t
*mutex
;
29 struct pthread
*pd
= THREAD_SELF
;
31 switch (__builtin_expect (mutex
->__data
.__kind
, PTHREAD_MUTEX_TIMED_NP
))
33 /* Recursive mutex. */
34 case PTHREAD_MUTEX_RECURSIVE_NP
:
35 /* Check whether we already hold the mutex. */
36 if (mutex
->__data
.__owner
== pd
)
38 /* Just bump the counter. */
39 ++mutex
->__data
.__count
;
43 if (lll_mutex_trylock (mutex
->__data
.__lock
) == 0)
45 /* Record the ownership. */
46 mutex
->__data
.__owner
= pd
;
47 mutex
->__data
.__count
= 1;
52 case PTHREAD_MUTEX_ERRORCHECK_NP
:
53 /* Error checking mutex. We do not check for deadlocks. */
55 /* Correct code cannot set any other type. */
56 case PTHREAD_MUTEX_TIMED_NP
:
57 case PTHREAD_MUTEX_ADAPTIVE_NP
:
59 if (lll_mutex_trylock (mutex
->__data
.__lock
) == 0)
61 /* Record the ownership. */
62 mutex
->__data
.__owner
= pd
;
70 strong_alias (__pthread_mutex_trylock
, pthread_mutex_trylock
)