Commit c40a515eee8a8e361f69b2bf5f3f59362413d196
1 parent
c319edf5
Add a general purpose timer for different time granularities (seconds, milliseco…
…nds, microseconds and nanoseconds).
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7 changed files
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214 additions
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0 deletions
include/tr/timer.h
0 → 100644
1 | +/** | |
2 | + * \file | |
3 | + * A timer with second, millisec, microsec or nanosec granularity. | |
4 | + * | |
5 | + * \author Georg Hopp | |
6 | + * | |
7 | + * \copyright | |
8 | + * Copyright © 2014 Georg Hopp | |
9 | + * | |
10 | + * This program is free software: you can redistribute it and/or modify | |
11 | + * it under the terms of the GNU General Public License as published by | |
12 | + * the Free Software Foundation, either version 3 of the License, or | |
13 | + * (at your option) any later version. | |
14 | + * | |
15 | + * This program is distributed in the hope that it will be useful, | |
16 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | + * GNU General Public License for more details. | |
19 | + * | |
20 | + * You should have received a copy of the GNU General Public License | |
21 | + * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
22 | + */ | |
23 | + | |
24 | +#ifndef __TR_TIMER_H__ | |
25 | +#define __TR_TIMER_H__ | |
26 | + | |
27 | +#include "trbase.h" | |
28 | + | |
29 | +typedef enum { | |
30 | + TR_TBASE_NAN = 0, | |
31 | + TR_TBASE_MIC, | |
32 | + TR_TBASE_MIL, | |
33 | + TR_TBASE_SEC | |
34 | +} TR_eTimeoutBase; | |
35 | + | |
36 | +TR_CLASS(TR_Timer) { | |
37 | + int sec; | |
38 | + int nsec; | |
39 | + TR_eTimeoutBase base; | |
40 | + unsigned long timeout; | |
41 | +}; | |
42 | + | |
43 | +TR_INSTANCE_INIT(TR_Timer); | |
44 | +TR_CLASSVARS_DECL(TR_Timer) {}; | |
45 | + | |
46 | +void TR_timerSet(TR_Timer, TR_eTimeoutBase, unsigned long); | |
47 | +unsigned long TR_timerGet(TR_Timer, unsigned long *); // 2nd arg gets amount of | |
48 | + // missed since last check. | |
49 | + | |
50 | +#define TR_timerSetNan(timer, val) (TR_timerSet((timer), TR_TBASE_NAN, (val))) | |
51 | +#define TR_timerSetMic(timer, val) (TR_timerSet((timer), TR_TBASE_MIC, (val))) | |
52 | +#define TR_timerSetMil(timer, val) (TR_timerSet((timer), TR_TBASE_MIL, (val))) | |
53 | +#define TR_timerSetSec(timer, val) (TR_timerSet((timer), TR_TBASE_SEC, (val))) | |
54 | + | |
55 | +#endif // __TR_TIMER_H__ | |
56 | + | |
57 | +// vim: set ts=4 sw=4: | ... | ... |
src/timer.c
0 → 100644
1 | +/** | |
2 | + * \file | |
3 | + * | |
4 | + * \author Georg Hopp | |
5 | + * | |
6 | + * \copyright | |
7 | + * Copyright © 2014 Georg Hopp | |
8 | + * | |
9 | + * This program is free software: you can redistribute it and/or modify | |
10 | + * it under the terms of the GNU General Public License as published by | |
11 | + * the Free Software Foundation, either version 3 of the License, or | |
12 | + * (at your option) any later version. | |
13 | + * | |
14 | + * This program is distributed in the hope that it will be useful, | |
15 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | + * GNU General Public License for more details. | |
18 | + * | |
19 | + * You should have received a copy of the GNU General Public License | |
20 | + * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
21 | + */ | |
22 | + | |
23 | +#include <stdarg.h> | |
24 | + | |
25 | +#include "trbase.h" | |
26 | + | |
27 | +static | |
28 | +int | |
29 | +timerCtor(void * _this, va_list * params) | |
30 | +{ | |
31 | + TR_eTimeoutBase base = va_arg(*params, TR_eTimeoutBase); | |
32 | + unsigned long timeout = va_arg(*params, unsigned long); | |
33 | + | |
34 | + TR_timerSet((TR_Timer)_this, base, timeout); | |
35 | + | |
36 | + return 0; | |
37 | +} | |
38 | + | |
39 | +static void timerDtor(void * _this) {} | |
40 | + | |
41 | +TR_INIT_IFACE(TR_Class, timerCtor, timerDtor, NULL); | |
42 | +TR_CREATE_CLASS(TR_Timer, NULL, NULL, TR_IF(TR_Class)); | |
43 | + | |
44 | +// vim: set ts=4 sw=4: | ... | ... |
src/timer_get.c
0 → 100644
1 | +/** | |
2 | + * \file | |
3 | + * | |
4 | + * \author Georg Hopp | |
5 | + * | |
6 | + * \copyright | |
7 | + * Copyright © 2014 Georg Hopp | |
8 | + * | |
9 | + * This program is free software: you can redistribute it and/or modify | |
10 | + * it under the terms of the GNU General Public License as published by | |
11 | + * the Free Software Foundation, either version 3 of the License, or | |
12 | + * (at your option) any later version. | |
13 | + * | |
14 | + * This program is distributed in the hope that it will be useful, | |
15 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | + * GNU General Public License for more details. | |
18 | + * | |
19 | + * You should have received a copy of the GNU General Public License | |
20 | + * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
21 | + */ | |
22 | + | |
23 | +#include <time.h> | |
24 | +#include <limits.h> | |
25 | + | |
26 | +#include "trbase.h" | |
27 | + | |
28 | +unsigned long | |
29 | +TR_timerGet(TR_Timer this, unsigned long * missed) | |
30 | +{ | |
31 | + struct timespec now; | |
32 | + unsigned long long elapsed; | |
33 | + unsigned long sec_factor; | |
34 | + long nan_factor; | |
35 | + unsigned long _missed; | |
36 | + | |
37 | + clock_gettime(CLOCK_REALTIME, &now); | |
38 | + | |
39 | + switch (this->base) { | |
40 | + case TR_TBASE_NAN: | |
41 | + sec_factor = 1000 * 1000 * 1000; | |
42 | + break; | |
43 | + case TR_TBASE_MIC: | |
44 | + sec_factor = 1000 * 1000; | |
45 | + break; | |
46 | + case TR_TBASE_MIL: | |
47 | + sec_factor = 1000; | |
48 | + break; | |
49 | + case TR_TBASE_SEC: | |
50 | + sec_factor = 1; | |
51 | + break; | |
52 | + } | |
53 | + | |
54 | + nan_factor = 1000 * 1000 * 1000 / sec_factor; | |
55 | + elapsed = (now.tv_sec - this->sec) * sec_factor | |
56 | + + (now.tv_nsec - this->nsec) / nan_factor; | |
57 | + | |
58 | + _missed = elapsed / this->timeout; | |
59 | + if (_missed) { | |
60 | + this->sec += _missed * this->timeout * sec_factor / nan_factor; | |
61 | + this->nsec += _missed * this->timeout * sec_factor % nan_factor; | |
62 | + *missed = _missed; | |
63 | + } else { | |
64 | + *missed = 0; | |
65 | + } | |
66 | + | |
67 | + return this->timeout - (elapsed % this->timeout); | |
68 | +} | |
69 | + | |
70 | +// vim: set ts=4 sw=4: | ... | ... |
src/timer_set.c
0 → 100644
1 | +/** | |
2 | + * \file | |
3 | + * | |
4 | + * \author Georg Hopp | |
5 | + * | |
6 | + * \copyright | |
7 | + * Copyright © 2014 Georg Hopp | |
8 | + * | |
9 | + * This program is free software: you can redistribute it and/or modify | |
10 | + * it under the terms of the GNU General Public License as published by | |
11 | + * the Free Software Foundation, either version 3 of the License, or | |
12 | + * (at your option) any later version. | |
13 | + * | |
14 | + * This program is distributed in the hope that it will be useful, | |
15 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | + * GNU General Public License for more details. | |
18 | + * | |
19 | + * You should have received a copy of the GNU General Public License | |
20 | + * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
21 | + */ | |
22 | + | |
23 | +#include <time.h> | |
24 | + | |
25 | +#include "trbase.h" | |
26 | + | |
27 | +void | |
28 | +TR_timerSet(TR_Timer this, TR_eTimeoutBase base, unsigned long timeout) | |
29 | +{ | |
30 | + struct timespec set; | |
31 | + clock_gettime(CLOCK_REALTIME, &set); | |
32 | + this->sec = set.tv_sec; | |
33 | + this->nsec = set.tv_nsec; | |
34 | + this->base = base; | |
35 | + this->timeout = timeout; | |
36 | +} | |
37 | + | |
38 | +// vim: set ts=4 sw=4: | ... | ... |
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