GNU Radio C++ API Reference g90d26cb
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high_res_timer.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2011,2013 Free Software Foundation, Inc.
4 *
5 * This file is part of GNU Radio
6 *
7 * SPDX-License-Identifier: GPL-3.0-or-later
8 *
9 */
10
11#ifndef INCLUDED_GNURADIO_HIGH_RES_TIMER_H
12#define INCLUDED_GNURADIO_HIGH_RES_TIMER_H
13
14////////////////////////////////////////////////////////////////////////
15// Use architecture defines to determine the implementation
16////////////////////////////////////////////////////////////////////////
17#if defined(linux) || defined(__linux) || defined(__linux__)
18#define GNURADIO_HRT_USE_CLOCK_GETTIME
19#include <ctime>
20#elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
21#include <windows.h>
22#define GNURADIO_HRT_USE_QUERY_PERFORMANCE_COUNTER
23#elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
24#include <mach/mach_time.h>
25#define GNURADIO_HRT_USE_MACH_ABSOLUTE_TIME
26#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
27#define GNURADIO_HRT_USE_CLOCK_GETTIME
28#include <ctime>
29#else
30#include <ratio>
31#define GNURADIO_HRT_USE_GENERIC_CLOCK
32#endif
33
34#include <gnuradio/api.h>
35#include <chrono>
36
37////////////////////////////////////////////////////////////////////////
38namespace gr {
39
40//! Typedef for the timer tick count
41typedef signed long long high_res_timer_type;
42
43//! Get the current time in ticks
45
46//! Get the current time in ticks - for performance monitoring
48
49//! Get the number of ticks per second
51
52//! Get the tick count at the epoch
54
55#ifdef GNURADIO_HRT_USE_CLOCK_GETTIME
56//! storage for high res timer type
57GR_RUNTIME_API extern clockid_t high_res_timer_source;
58#endif
59
60} /* namespace gr */
61
62////////////////////////////////////////////////////////////////////////
63#ifdef GNURADIO_HRT_USE_CLOCK_GETTIME
65{
66 timespec ts;
67 clock_gettime(CLOCK_MONOTONIC, &ts);
68 return ts.tv_sec * high_res_timer_tps() + ts.tv_nsec;
69}
70
72{
73 timespec ts;
74 clock_gettime(high_res_timer_source, &ts);
75 return ts.tv_sec * high_res_timer_tps() + ts.tv_nsec;
76}
77
78inline gr::high_res_timer_type gr::high_res_timer_tps(void) { return 1000000000UL; }
79#endif /* GNURADIO_HRT_USE_CLOCK_GETTIME */
80
81////////////////////////////////////////////////////////////////////////
82#ifdef GNURADIO_HRT_USE_MACH_ABSOLUTE_TIME
83
85{
86 return mach_absolute_time();
87}
88
90{
92}
93
95{
96 mach_timebase_info_data_t info;
97 mach_timebase_info(&info);
98 return gr::high_res_timer_type(info.denom * 1000000000UL) / info.numer;
99}
100#endif
101
102////////////////////////////////////////////////////////////////////////
103#ifdef GNURADIO_HRT_USE_QUERY_PERFORMANCE_COUNTER
104
106{
107 LARGE_INTEGER counts;
108 QueryPerformanceCounter(&counts);
109 return counts.QuadPart;
110}
111
113{
114 return gr::high_res_timer_now();
115}
116
118{
119 LARGE_INTEGER freq;
120 QueryPerformanceFrequency(&freq);
121 return freq.QuadPart;
122}
123#endif
124
125////////////////////////////////////////////////////////////////////////
126#ifdef GNURADIO_HRT_USE_GENERIC_CLOCK
128{
129 return std::chrono::duration<gr::high_res_timer_type, std::nano>(
130 std::chrono::steady_clock::now().time_since_epoch())
131 .count();
132}
133
138
139inline gr::high_res_timer_type gr::high_res_timer_tps(void) { return 1000000000UL; }
140#endif
141
142////////////////////////////////////////////////////////////////////////
144{
145 static const double ticks_per_second = gr::high_res_timer_tps();
146 const double seconds_since_epoch =
147 std::chrono::duration<double>(std::chrono::system_clock::now().time_since_epoch())
148 .count();
149 return gr::high_res_timer_now() - seconds_since_epoch * ticks_per_second;
150}
151
152#endif /* INCLUDED_GNURADIO_HIGH_RES_TIMER_H */
#define GR_RUNTIME_API
Definition gnuradio-runtime/include/gnuradio/api.h:18
GNU Radio logging wrapper.
Definition basic_block.h:29
high_res_timer_type high_res_timer_now(void)
Get the current time in ticks.
Definition high_res_timer.h:127
high_res_timer_type high_res_timer_tps(void)
Get the number of ticks per second.
Definition high_res_timer.h:139
high_res_timer_type high_res_timer_now_perfmon(void)
Get the current time in ticks - for performance monitoring.
Definition high_res_timer.h:134
high_res_timer_type high_res_timer_epoch(void)
Get the tick count at the epoch.
Definition high_res_timer.h:143
signed long long high_res_timer_type
Typedef for the timer tick count.
Definition high_res_timer.h:41