1 /* sem_post -- post to a POSIX semaphore. SPARC version.
2 Copyright (C) 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Jakub Jelinek <jakub@redhat.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>
29 __new_sem_post (sem_t
*sem
)
31 struct sparc_new_sem
*isem
= (struct sparc_new_sem
*) sem
;
35 nr
= atomic_increment_val (&isem
->value
);
38 __sparc32_atomic_do_lock24 (&isem
->lock
);
40 __sparc32_atomic_do_unlock24 (&isem
->lock
);
42 atomic_full_barrier ();
43 if (isem
->nwaiters
> 0)
45 int err
= lll_futex_wake (&isem
->value
, 1,
46 isem
->private ^ FUTEX_PRIVATE_FLAG
);
47 if (__builtin_expect (err
, 0) < 0)
55 versioned_symbol (libpthread
, __new_sem_post
, sem_post
, GLIBC_2_1
);
58 #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1)
60 attribute_compat_text_section
61 __old_sem_post (sem_t
*sem
)
63 struct sparc_old_sem
*isem
= (struct sparc_old_sem
*) sem
;
67 nr
= atomic_increment_val (&isem
->value
);
70 __sparc32_atomic_do_lock24 (&isem
->lock
);
72 __sparc32_atomic_do_unlock24 (&isem
->lock
);
74 int err
= lll_futex_wake (&isem
->value
, 1,
75 isem
->private ^ FUTEX_PRIVATE_FLAG
);
76 if (__builtin_expect (err
, 0) < 0)
83 compat_symbol (libpthread
, __old_sem_post
, sem_post
, GLIBC_2_0
);