xref: /aosp_15_r20/external/vboot_reference/tests/common/timer_utils.c (revision 8617a60d3594060b7ecbd21bc622a7c14f3cf2bc) 
1 /* Copyright 2010 The ChromiumOS Authors
2  * Use of this source code is governed by a BSD-style license that can be
3  * found in the LICENSE file.
4  */
5 
6 #include "timer_utils.h"
7 
StartTimer(ClockTimerState * ct)8 void StartTimer(ClockTimerState* ct) {
9 	clock_gettime(CLOCK_REALTIME, &ct->start_time);
10 }
11 
StopTimer(ClockTimerState * ct)12 void StopTimer(ClockTimerState* ct) {
13 	clock_gettime(CLOCK_REALTIME, &ct->end_time);
14 }
15 
GetDurationMsecs(ClockTimerState * ct)16 uint32_t GetDurationMsecs(ClockTimerState* ct) {
17 	uint64_t start = ((uint64_t) ct->start_time.tv_sec * 1000000000 +
18 			  (uint64_t) ct->start_time.tv_nsec);
19 	uint64_t end = ((uint64_t) ct->end_time.tv_sec * 1000000000 +
20 			(uint64_t) ct->end_time.tv_nsec);
21 	uint64_t duration_msecs = (end - start) / 1000000U;  /* Nanoseconds ->
22 							      * Milliseconds. */
23 	return (uint32_t) duration_msecs;
24 }
25