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/* libnbd
* Copyright Red Hat
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of Red Hat nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RED HAT 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 RED HAT 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.
*/
#ifndef LIBNBD_BENCH_H
#define LIBNBD_BENCH_H
#include <sys/time.h>
#define MICROSECONDS 1000000
struct bench {
struct timeval start, stop;
};
static inline void
bench_start (struct bench *b)
{
gettimeofday (&b->start, NULL);
}
static inline void
bench_stop (struct bench *b)
{
gettimeofday (&b->stop, NULL);
}
static inline double
bench_sec (struct bench *b)
{
struct timeval dt;
dt.tv_sec = b->stop.tv_sec - b->start.tv_sec;
dt.tv_usec = b->stop.tv_usec - b->start.tv_usec;
if (dt.tv_usec < 0) {
dt.tv_sec -= 1;
dt.tv_usec += MICROSECONDS;
}
return ((double)dt.tv_sec * MICROSECONDS + dt.tv_usec) / MICROSECONDS;
}
#endif /* LIBNBD_BENCH_H */
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