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timer.cpp
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1 /* Copyright (c) 2014-2017, ARM Limited and Contributors
2  *
3  * SPDX-License-Identifier: MIT
4  *
5  * Permission is hereby granted, free of charge,
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8  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
9  * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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11  * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
14  * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19  */
20 
21 #include "timer.h"
22 #include <sys/time.h>
23 
24 timeval start_time;
25 
26 void timer_init()
27 {
28  start_time.tv_sec = 0;
29  start_time.tv_usec = 0;
30  gettimeofday(&start_time, NULL);
31 }
32 
34 {
35  timeval now;
36  gettimeofday(&now, NULL);
37  float seconds = (now.tv_sec - start_time.tv_sec);
38  float milliseconds = (float(now.tv_usec - start_time.tv_usec)) / 1000000.0f;
39  return seconds + milliseconds;
40 }
GLfloat GLfloat f
Definition: gl2ext.h:2707
void timer_init()
Definition: timer.cpp:26
precision highp float
Definition: hiz_cull.cs:37
timeval start_time
Definition: timer.cpp:24
double get_elapsed_time()
Definition: timer.cpp:33