keyboard stuff
handle.invalid
1/*
2Copyright 2011 Jun Wako <wakojun@gmail.com>
3Copyright 2021 Simon Arlott
4
5This program is free software: you can redistribute it and/or modify
6it under the terms of the GNU General Public License as published by
7the Free Software Foundation, either version 2 of the License, or
8(at your option) any later version.
9
10This program is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with this program. If not, see <http://www.gnu.org/licenses/>.
17*/
18
19#pragma once
20
21#if __has_include_next("_timer.h")
22# include_next "_timer.h" /* Include the platform's _timer.h */
23#endif
24
25#include <stdint.h>
26
27#define TIMER_DIFF_8(a, b) (uint8_t)((a) - (b))
28#define TIMER_DIFF_16(a, b) (uint16_t)((a) - (b))
29#define TIMER_DIFF_32(a, b) (uint32_t)((a) - (b))
30#define TIMER_DIFF_RAW(a, b) TIMER_DIFF_8(a, b)
31
32#ifdef __cplusplus
33extern "C" {
34#endif
35
36extern volatile uint32_t timer_count;
37
38void timer_init(void);
39void timer_clear(void);
40void timer_save(void);
41void timer_restore(void);
42uint16_t timer_read(void);
43uint32_t timer_read32(void);
44uint16_t timer_elapsed(uint16_t last);
45uint32_t timer_elapsed32(uint32_t last);
46
47// Utility functions to check if a future time has expired & autmatically handle time wrapping if checked / reset frequently (half of max value)
48#define timer_expired(current, future) ((uint16_t)(current - future) < UINT16_MAX / 2)
49#define timer_expired32(current, future) ((uint32_t)(current - future) < UINT32_MAX / 2)
50
51// Use an appropriate timer integer size based on architecture (16-bit will overflow sooner)
52#if FAST_TIMER_T_SIZE < 32
53# define TIMER_DIFF_FAST(a, b) TIMER_DIFF_16(a, b)
54# define timer_expired_fast(current, future) timer_expired(current, future)
55typedef uint16_t fast_timer_t;
56fast_timer_t inline timer_read_fast(void) {
57 return timer_read();
58}
59fast_timer_t inline timer_elapsed_fast(fast_timer_t last) {
60 return timer_elapsed(last);
61}
62#else
63# define TIMER_DIFF_FAST(a, b) TIMER_DIFF_32(a, b)
64# define timer_expired_fast(current, future) timer_expired32(current, future)
65typedef uint32_t fast_timer_t;
66fast_timer_t inline timer_read_fast(void) {
67 return timer_read32();
68}
69fast_timer_t inline timer_elapsed_fast(fast_timer_t last) {
70 return timer_elapsed32(last);
71}
72#endif
73
74#ifdef __cplusplus
75}
76#endif