1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* Copyright (C) 2015, 2016 "IoT.bzh"
* Author "Romain Forlot" <romain.forlot@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <time.h>
#include <stdlib.h>
#include <cmath>
#include "timer.hpp"
long long int system_time_us()
{
struct timespec t_usec;
long long int timestamp_usec = 0;
if(!::clock_gettime(CLOCK_MONOTONIC, &t_usec))
timestamp_usec = (t_usec.tv_nsec / 1000ll) + (t_usec.tv_sec* 1000000ll);
return timestamp_usec;
}
long long int system_time_ms()
{
struct timespec t_msec;
long long int timestamp_msec = 0;
if(!::clock_gettime(CLOCK_MONOTONIC, &t_msec))
timestamp_msec = (t_msec.tv_nsec / 1000000ll) + (t_msec.tv_sec* 1000ll);
return timestamp_msec;
}
long long int system_time_s()
{
struct timespec t_sec;
long long int timestamp_sec = 0;
if(!::clock_gettime(CLOCK_MONOTONIC, &t_sec))
timestamp_sec = t_sec.tv_sec;
return timestamp_sec;
}
frequency_clock_t::frequency_clock_t()
: unit_{1000000}, frequency_{10.0}, last_tick_{0}, time_function_{nullptr}
{}
frequency_clock_t::frequency_clock_t(float frequency)
: unit_{1000000}, frequency_{frequency}, last_tick_{0}, time_function_{nullptr}
{
if(frequency_ <= 0)
frequency_ = 1;
}
frequency_clock_t::frequency_clock_t(float frequency, uint64_t last_tick, time_function_t time_function)
: unit_{1000000}, frequency_{frequency}, last_tick_{0}, time_function_{nullptr}
{
if(frequency_ <= 0)
frequency_ = 1;
}
/// @brief Return the period in ms given the frequency in hertz.
/// @param[in] frequency - Frequency to convert, in hertz
float frequency_clock_t::frequency_to_period() const
{
return frequency_ == 0 ? 0 : 1 / frequency_;
}
const struct timeval frequency_clock_t::get_timeval_from_period() const
{
struct timeval freq = {0, 0};
float f;
freq.tv_usec = (long int)(std::modf(frequency_to_period(), &f) * unit_);
freq.tv_sec = (time_t)f;
return freq;
}
bool frequency_clock_t::started()
{
return last_tick_ != 0;
}
time_function_t frequency_clock_t::get_time_function()
{
return time_function_ != nullptr ? time_function_ : system_time_us;
}
bool frequency_clock_t::elapsed(bool stagger)
{
float period = frequency_to_period();
float elapsed_time = 0;
if(!started() && stagger)
last_tick_ = get_time_function()() - (rand() % int(period));
// Make sure it ticks the the first call
elapsed_time = !started() ? period : (float)get_time_function()() - (float)last_tick_;
return frequency_ == 0 || elapsed_time >= period;
}
float frequency_clock_t::get_frequency() const
{
return frequency_;
}
/// @brief Force the clock to tick, regardless of it its time has actually
/// elapsed.
void frequency_clock_t::tick(uint64_t timestamp)
{
last_tick_ = timestamp;
}
|
