]>
git.ipfire.org Git - thirdparty/glibc.git/blob - nptl/lll_timedlock_wait.c
1 /* Timed low level locking for pthread library. Generic futex-using version.
2 Copyright (C) 2003-2020 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 <https://www.gnu.org/licenses/>. */
22 #include <lowlevellock.h>
28 __lll_clocklock_wait (int *futex
, int val
, clockid_t clockid
,
29 const struct timespec
*abstime
, int private)
31 struct timespec ts
, *tsp
= NULL
;
35 /* Reject invalid timeouts. */
36 if (! valid_nanoseconds (abstime
->tv_nsec
))
39 /* Get the current time. This can only fail if clockid is not valid. */
40 if (__glibc_unlikely (__clock_gettime (clockid
, &ts
) != 0))
43 /* Compute relative timeout. */
44 ts
.tv_sec
= abstime
->tv_sec
- ts
.tv_sec
;
45 ts
.tv_nsec
= abstime
->tv_nsec
- ts
.tv_nsec
;
48 ts
.tv_nsec
+= 1000000000;
58 /* If *futex == val, wait until woken or timeout. */
59 lll_futex_timed_wait (futex
, val
, tsp
, private);