1 /* sem_trywait -- wait on a semaphore. SPARC version.
2 Copyright (C) 2003-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
22 #include <lowlevellock.h>
23 #include <internaltypes.h>
24 #include <semaphore.h>
26 #include <shlib-compat.h>
30 __new_sem_trywait (sem_t
*sem
)
32 struct sparc_old_sem
*isem
= (struct sparc_old_sem
*) sem
;
38 val
= atomic_decrement_if_positive (&isem
->value
);
41 __sparc32_atomic_do_lock24 (&isem
->lock
);
44 isem
->value
= val
- 1;
45 __sparc32_atomic_do_unlock24 (&isem
->lock
);
54 versioned_symbol (libpthread
, __new_sem_trywait
, sem_trywait
, GLIBC_2_1
);
55 #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1)
56 strong_alias (__new_sem_trywait
, __old_sem_trywait
)
57 compat_symbol (libpthread
, __old_sem_trywait
, sem_trywait
, GLIBC_2_0
);