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, see
18 <http://www.gnu.org/licenses/>. */
22 #include <lowlevellock.h>
23 #include <internaltypes.h>
24 #include <semaphore.h>
29 extern void __sem_wait_cleanup (void *arg) attribute_hidden;
33 sem_timedwait (sem_t *sem, const struct timespec *abstime)
35 struct sparc_new_sem *isem = (struct sparc_new_sem *) sem;
40 val = atomic_decrement_if_positive (&isem->value);
43 __sparc32_atomic_do_lock24 (&isem->lock);
46 isem->value = val - 1;
47 __sparc32_atomic_do_unlock24 (&isem->lock);
53 if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
60 atomic_increment (&isem->nwaiters);
63 __sparc32_atomic_do_lock24 (&isem->lock);
65 __sparc32_atomic_do_unlock24 (&isem->lock);
68 pthread_cleanup_push (__sem_wait_cleanup, isem);
76 /* Get the current time. */
77 __gettimeofday (&tv, NULL);
79 /* Compute relative timeout. */
80 sec = abstime->tv_sec - tv.tv_sec;
81 nsec = abstime->tv_nsec - tv.tv_usec * 1000;
88 /* Already timed out? */
92 __set_errno (ETIMEDOUT);
101 /* Enable asynchronous cancellation. Required by the standard. */
102 int oldtype = __pthread_enable_asynccancel ();
104 err = lll_futex_timed_wait (&isem->value, 0, &rt,
105 isem->private ^ FUTEX_PRIVATE_FLAG);
107 /* Disable asynchronous cancellation. */
108 __pthread_disable_asynccancel (oldtype);
110 if (err != 0 && err != -EWOULDBLOCK)
118 val = atomic_decrement_if_positive (&isem->value);
121 __sparc32_atomic_do_lock24 (&isem->lock);
124 isem->value = val - 1;
125 __sparc32_atomic_do_unlock24 (&isem->lock);
135 pthread_cleanup_pop (0);
138 atomic_decrement (&isem->nwaiters);
141 __sparc32_atomic_do_lock24 (&isem->lock);
143 __sparc32_atomic_do_unlock24 (&isem->lock);