1 | /* gethrxtime -- get high resolution real time |
2 | |
3 | Copyright (C) 2005, 2009-2019 Free Software Foundation, Inc. |
4 | |
5 | This program is free software: you can redistribute it and/or modify |
6 | it under the terms of the GNU General Public License as published by |
7 | the Free Software Foundation; either version 3 of the License, or |
8 | (at your option) any later version. |
9 | |
10 | This program 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 |
13 | GNU General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU General Public License |
16 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
17 | |
18 | /* Written by Paul Eggert. */ |
19 | |
20 | #ifndef GETHRXTIME_H_ |
21 | #define GETHRXTIME_H_ 1 |
22 | |
23 | #include "xtime.h" |
24 | |
25 | #ifndef _GL_INLINE_HEADER_BEGIN |
26 | #error "Please include config.h first." |
27 | #endif |
28 | _GL_INLINE_HEADER_BEGIN |
29 | #ifndef GETHRXTIME_INLINE |
30 | # define GETHRXTIME_INLINE _GL_INLINE |
31 | #endif |
32 | |
33 | #ifdef __cplusplus |
34 | extern "C" { |
35 | #endif |
36 | |
37 | /* Get the current time, as a count of the number of nanoseconds since |
38 | an arbitrary epoch (e.g., the system boot time). Prefer a |
39 | high-resolution clock that is not subject to resetting or |
40 | drifting. */ |
41 | |
42 | #if HAVE_ARITHMETIC_HRTIME_T && HAVE_DECL_GETHRTIME |
43 | # include <time.h> |
44 | GETHRXTIME_INLINE xtime_t gethrxtime (void) { return gethrtime (); } |
45 | # else |
46 | xtime_t gethrxtime (void); |
47 | #endif |
48 | |
49 | _GL_INLINE_HEADER_END |
50 | |
51 | #ifdef __cplusplus |
52 | } |
53 | #endif |
54 | |
55 | #endif |
56 | |