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/*
* Copyright (C) 2015 Cyril Hrubis <chrubis@suse.cz>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
Timer - struct timespec conversion runtimes and easy to use functions to
measure elapsed time.
*/
#ifndef TST_TIMER
#define TST_TIMER
#include <sys/time.h>
#include <time.h>
/*
* Converts timespec to microseconds.
*/
static inline long long tst_timespec_to_us(struct timespec t)
{
return t.tv_sec * 1000000 + (t.tv_nsec + 500) / 1000;
}
/*
* Converts timespec to miliseconds.
*/
static inline long long tst_timespec_to_ms(struct timespec t)
{
return t.tv_sec * 1000 + (t.tv_nsec + 500000) / 1000000;
}
/*
* Converts ms to struct timeval
*/
static inline struct timeval tst_ms_to_timeval(long long ms)
{
struct timeval ret;
ret.tv_sec = ms / 1000;
ret.tv_usec = (ms % 1000) * 1000;
return ret;
}
/*
* Converts us to struct timeval
*/
static inline struct timeval tst_us_to_timeval(long long us)
{
struct timeval ret;
ret.tv_sec = us / 1000000;
ret.tv_usec = us % 1000000;
return ret;
}
/*
* Comparsions
*/
static inline int tst_timespec_lt(struct timespec t1, struct timespec t2)
{
if (t1.tv_sec == t2.tv_sec)
return t1.tv_nsec < t2.tv_nsec;
return t1.tv_sec < t2.tv_sec;
}
/*
* Adds us microseconds to t.
*/
static inline struct timespec tst_timespec_add_us(struct timespec t,
long long us)
{
t.tv_sec += us / 1000000;
t.tv_nsec += (us % 1000000) * 1000;
if (t.tv_nsec >= 1000000000) {
t.tv_sec++;
t.tv_nsec -= 1000000000;
}
return t;
}
/*
* Returns difference between two timespec structures.
*/
static inline struct timespec tst_timespec_diff(struct timespec t1,
struct timespec t2)
{
struct timespec res;
res.tv_sec = t1.tv_sec - t2.tv_sec;
if (t1.tv_nsec < t2.tv_nsec) {
res.tv_sec--;
res.tv_nsec = 1000000000 - (t2.tv_nsec - t1.tv_nsec);
} else {
res.tv_nsec = t1.tv_nsec - t2.tv_nsec;
}
return res;
}
static inline long long tst_timespec_diff_us(struct timespec t1,
struct timespec t2)
{
return tst_timespec_to_us(tst_timespec_diff(t1, t2));
}
static inline long long tst_timespec_diff_ms(struct timespec t1,
struct timespec t2)
{
return tst_timespec_to_ms(tst_timespec_diff(t1, t2));
}
/*
* Returns absolute value of difference between two timespec structures.
*/
static inline struct timespec tst_timespec_abs_diff(struct timespec t1,
struct timespec t2)
{
if (tst_timespec_lt(t1, t2))
return tst_timespec_diff(t2, t1);
else
return tst_timespec_diff(t1, t2);
}
static inline long long tst_timespec_abs_diff_us(struct timespec t1,
struct timespec t2)
{
return tst_timespec_to_us(tst_timespec_abs_diff(t1, t2));
}
static inline long long tst_timespec_abs_diff_ms(struct timespec t1,
struct timespec t2)
{
return tst_timespec_to_ms(tst_timespec_abs_diff(t1, t2));
}
/*
* Exits the test with TCONF if particular timer is not supported. This is
* intended to be used in test setup. There is no cleanup callback parameter as
* you are expected to call it before initializing any resources that has to be
* cleaned up later.
*
* @clk_id: Posix clock to use.
*/
void tst_timer_check(clockid_t clk_id);
/*
* Marks a start time for given clock type.
*
* @clk_id: Posix clock to use.
*/
void tst_timer_start(clockid_t clk_id);
/*
* Marks timer end time.
*/
void tst_timer_stop(void);
/*
* Retuns elapsed time in struct timespec.
*/
struct timespec tst_timer_elapsed(void);
/*
* Returns elapsed time in miliseconds.
*/
static inline long long tst_timer_elapsed_ms(void)
{
return tst_timespec_to_ms(tst_timer_elapsed());
}
/*
* Returns elapsed time in microseconds.
*/
static inline long long tst_timer_elapsed_us(void)
{
return tst_timespec_to_us(tst_timer_elapsed());
}
#endif /* TST_TIMER */