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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* Nanoseconds accuracy timestamp test
*/
/*
* COPYRIGHT (c) 1989-2012.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems.h>
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#define CONFIGURE_INIT
#include "system.h"
#include <rtems/score/timespec.h> /* _Timespec_Substract */
#include "tmacros.h"
#include "pritime.h"
const char rtems_test_name[] = "NANOSECOND CLOCK";
static char *my_ctime( time_t t )
{
static char b[32];
ctime_r(&t, b);
b[ strlen(b) - 1] = '\0';
return b;
}
static void subtract_em(
struct timespec *start,
struct timespec *stop,
struct timespec *t
)
{
t->tv_sec = 0;
t->tv_nsec = 0;
_Timespec_Subtract( start, stop, t );
}
rtems_task Init(
rtems_task_argument argument
)
{
rtems_status_code status;
rtems_time_of_day time;
int index;
TEST_BEGIN();
time.year = 2007;
time.month = 03;
time.day = 24;
time.hour = 11;
time.minute = 15;
time.second = 0;
time.ticks = 0;
status = rtems_clock_set( &time );
directive_failed( status, "clock set" );
/*
* Iterate 10 times showing difference in TOD
*/
printf( "10 iterations of getting TOD\n" );
for (index=0 ; index <10 ; index++ ) {
struct timespec start, stop;
struct timespec diff;
clock_gettime( CLOCK_REALTIME, &start );
clock_gettime( CLOCK_REALTIME, &stop );
subtract_em( &start, &stop, &diff );
printf( "Start: %s:%ld\nStop : %s:%ld",
my_ctime(start.tv_sec), start.tv_nsec,
my_ctime(stop.tv_sec), stop.tv_nsec
);
printf( " --> %" PRIdtime_t ":%ld\n", diff.tv_sec, diff.tv_nsec );
}
/*
* Iterate 10 times showing difference in Uptime
*/
printf( "\n10 iterations of getting Uptime\n" );
for (index=0 ; index <10 ; index++ ) {
struct timespec start, stop;
struct timespec diff;
rtems_clock_get_uptime( &start );
rtems_clock_get_uptime( &stop );
subtract_em( &start, &stop, &diff );
printf( "%" PRIdtime_t ":%ld %" PRIdtime_t ":%ld --> %" PRIdtime_t ":%ld\n",
start.tv_sec, start.tv_nsec,
stop.tv_sec, stop.tv_nsec,
diff.tv_sec, diff.tv_nsec
);
}
/*
* Iterate 10 times showing difference in Uptime with different counts
*/
printf( "\n10 iterations of getting Uptime with different loop values\n" );
for (index=1 ; index <=10 ; index++ ) {
struct timespec start, stop;
struct timespec diff;
long j, max = (index * 10000L);
rtems_clock_get_uptime( &start );
for (j=0 ; j<max ; j++ )
dummy_function_empty_body_to_force_call();
rtems_clock_get_uptime( &stop );
subtract_em( &start, &stop, &diff );
printf( "loop of %ld %" PRIdtime_t
":%ld %" PRIdtime_t ":%ld --> %" PRIdtime_t ":%ld\n",
max,
start.tv_sec, start.tv_nsec,
stop.tv_sec, stop.tv_nsec,
diff.tv_sec, diff.tv_nsec
);
}
sleep(1);
TEST_END();
exit(0);
}
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