1 /* Copyright (c) 2017-2020 Hans-Kristian Arntzen
2  *
3  * Permission is hereby granted, free of charge, to any person obtaining
4  * a copy of this software and associated documentation files (the
5  * "Software"), to deal in the Software without restriction, including
6  * without limitation the rights to use, copy, modify, merge, publish,
7  * distribute, sublicense, and/or sell copies of the Software, and to
8  * permit persons to whom the Software is furnished to do so, subject to
9  * the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be
12  * included in all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
15  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
17  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
18  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
19  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
20  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21  */
22 
23 #pragma once
24 
25 #include <stdint.h>
26 
27 namespace Util
28 {
29 class FrameTimer
30 {
31 public:
32 	FrameTimer();
33 
34 	void reset();
35 	double frame();
36 	double frame(double frame_time);
37 	double get_elapsed() const;
38 	double get_frame_time() const;
39 
40 	void enter_idle();
41 	void leave_idle();
42 
43 private:
44 	int64_t start;
45 	int64_t last;
46 	int64_t last_period;
47 	int64_t idle_start;
48 	int64_t idle_time = 0;
49 	int64_t get_time();
50 };
51 
52 class Timer
53 {
54 public:
55 	void start();
56 	double end();
57 
58 private:
59 	int64_t t = 0;
60 };
61 
62 int64_t get_current_time_nsecs();
63 }