1 /* Support functionality for using time.
2 Copyright (C) 2019-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
19 #ifndef SUPPORT_TIME_H
20 #define SUPPORT_TIME_H
26 /* Name of the env variable, which indicates if it is possible to
27 adjust time on target machine. */
28 #define SETTIME_ENV_NAME "GLIBC_TEST_ALLOW_TIME_SETTING"
30 /* The following functions call the corresponding libc functions and
31 terminate the process on error. */
33 void xclock_gettime (clockid_t clock
, struct timespec
*ts
);
34 void xclock_settime (clockid_t clock
, const struct timespec
*ts
);
36 /* This helper can often simplify tests by avoiding an explicit
37 variable declaration or allowing that declaration to be const. */
39 static inline struct timespec
xclock_now (clockid_t clock
)
42 xclock_gettime (clock
, &ts
);
48 #endif /* SUPPORT_TIME_H */