1 /* sem_timedwait -- wait on a semaphore. SPARC version.
2 Copyright (C) 2003, 2006, 2007 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, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #include <lowlevellock.h>
24 #include <internaltypes.h>
25 #include <semaphore.h>
28 #include <shlib-compat.h>
31 extern void __sem_wait_cleanup (void *arg
) attribute_hidden
;
35 sem_timedwait (sem_t
*sem
, const struct timespec
*abstime
)
37 struct sparc_new_sem
*isem
= (struct sparc_new_sem
*) sem
;
42 val
= atomic_decrement_if_positive (&isem
->value
);
45 __sparc32_atomic_do_lock24 (&isem
->lock
);
48 isem
->value
= val
- 1;
49 __sparc32_atomic_do_unlock24 (&isem
->lock
);
55 if (abstime
->tv_nsec
< 0 || abstime
->tv_nsec
>= 1000000000)
62 atomic_increment (&isem
->nwaiters
);
65 __sparc32_atomic_do_lock24 (&isem
->lock
);
67 __sparc32_atomic_do_unlock24 (&isem
->lock
);
70 pthread_cleanup_push (__sem_wait_cleanup
, isem
);
78 /* Get the current time. */
79 __gettimeofday (&tv
, NULL
);
81 /* Compute relative timeout. */
82 sec
= abstime
->tv_sec
- tv
.tv_sec
;
83 nsec
= abstime
->tv_nsec
- tv
.tv_usec
* 1000;
90 /* Already timed out? */
94 __set_errno (ETIMEDOUT
);
103 /* Enable asynchronous cancellation. Required by the standard. */
104 int oldtype
= __pthread_enable_asynccancel ();
106 err
= lll_futex_timed_wait (&isem
->value
, 0, &rt
,
107 isem
->private ^ FUTEX_PRIVATE_FLAG
);
109 /* Disable asynchronous cancellation. */
110 __pthread_disable_asynccancel (oldtype
);
112 if (err
!= 0 && err
!= -EWOULDBLOCK
)
120 val
= atomic_decrement_if_positive (&isem
->value
);
123 __sparc32_atomic_do_lock24 (&isem
->lock
);
126 isem
->value
= val
- 1;
127 __sparc32_atomic_do_unlock24 (&isem
->lock
);
137 pthread_cleanup_pop (0);
140 atomic_decrement (&isem
->nwaiters
);
143 __sparc32_atomic_do_lock24 (&isem
->lock
);
145 __sparc32_atomic_do_unlock24 (&isem
->lock
);