1 /*
2 * Copyright (c) 2017, The OpenThread Authors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /**
30 * @file
31 * This file includes definitions for time functions.
32 */
33
34 #ifndef OTBR_COMMON_TIME_HPP_
35 #define OTBR_COMMON_TIME_HPP_
36
37 #include "openthread-br/config.h"
38
39 #include <chrono>
40
41 #include <stdint.h>
42
43 #include <sys/time.h>
44
45 namespace otbr {
46
47 using Seconds = std::chrono::seconds;
48 using Milliseconds = std::chrono::milliseconds;
49 using Microseconds = std::chrono::microseconds;
50 using Clock = std::chrono::steady_clock;
51 using Timepoint = Clock::time_point;
52
FromTimeval(const timeval & aTime)53 template <class D> D FromTimeval(const timeval &aTime)
54 {
55 return std::chrono::duration_cast<D>(Microseconds{aTime.tv_usec}) +
56 std::chrono::duration_cast<D>(Seconds{aTime.tv_sec});
57 }
58
ToTimeval(const D & aDuration)59 template <class D> timeval ToTimeval(const D &aDuration)
60 {
61 timeval ret;
62 const size_t kMicrosecondsPeriod = 1000000;
63 auto microseconds = std::chrono::duration_cast<Microseconds>(aDuration).count();
64
65 ret.tv_sec = microseconds / kMicrosecondsPeriod;
66 ret.tv_usec = microseconds % kMicrosecondsPeriod;
67
68 return ret;
69 }
70
71 } // namespace otbr
72
73 #endif // OTBR_COMMON_TIME_HPP_
74