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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/sparc/sparc32/lowlevellock.c
1 /* low level locking for pthread library. SPARC version.
2 Copyright (C) 2003-2019 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>
27 __lll_lock_wait_private (int *futex
)
31 int oldval
= atomic_compare_and_exchange_val_24_acq (futex
, 2, 1);
33 lll_futex_wait (futex
, 2, LLL_PRIVATE
);
35 while (atomic_compare_and_exchange_val_24_acq (futex
, 2, 0) != 0);
39 /* These functions don't get included in libc.so */
40 #if IS_IN (libpthread)
42 __lll_lock_wait (int *futex
, int private)
46 int oldval
= atomic_compare_and_exchange_val_24_acq (futex
, 2, 1);
48 lll_futex_wait (futex
, 2, private);
50 while (atomic_compare_and_exchange_val_24_acq (futex
, 2, 0) != 0);
55 __lll_timedlock_wait (int *futex
, const struct timespec
*abstime
, int private)
57 /* Reject invalid timeouts. */
58 if (abstime
->tv_nsec
< 0 || abstime
->tv_nsec
>= 1000000000)
66 /* Get the current time. */
67 (void) __gettimeofday (&tv
, NULL
);
69 /* Compute relative timeout. */
70 rt
.tv_sec
= abstime
->tv_sec
- tv
.tv_sec
;
71 rt
.tv_nsec
= abstime
->tv_nsec
- tv
.tv_usec
* 1000;
74 rt
.tv_nsec
+= 1000000000;
78 /* Already timed out? */
83 int oldval
= atomic_compare_and_exchange_val_24_acq (futex
, 2, 1);
85 lll_futex_timed_wait (futex
, 2, &rt
, private);
87 while (atomic_compare_and_exchange_val_24_acq (futex
, 2, 0) != 0);