libxkbcommon/bench/bench.c

153 lines
4.2 KiB
C

/*
* Copyright © 2015 Kazunobu Kuriyama <kazunobu.kuriyama@nifty.com>
* Ran Benita <ran234@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#if defined(HAVE_CLOCK_GETTIME)
#define USE_CLOCK_GETTIME
#include <time.h>
#elif defined(__MACH__) && __MACH__ == 1
#define USE_MACH_ABSOLUTE_TIME
#include <mach/mach_time.h>
#else
/* gettimeofday() - a last resort */
#include <sys/time.h>
#endif
#include <assert.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include "bench.h"
static void
set_bench_time(struct bench_time *dest, long seconds, long milliseconds)
{
dest->seconds = seconds;
dest->milliseconds = milliseconds;
}
static void
normalize_bench_time(struct bench_time *obj)
{
if (obj->milliseconds >= 0) {
return;
}
obj->milliseconds += 1000000;
obj->seconds--;
}
void
bench_timer_reset(struct bench_timer *self)
{
#if defined(USE_MACH_ABSOLUTE_TIME)
mach_timebase_info_data_t info;
if (mach_timebase_info(&info) == 0) {
self->scaling_factor = info.numer / info.denom;
}
#endif
self->start.seconds = 0L;
self->start.milliseconds = 0L;
self->stop.seconds = 0L;
self->stop.milliseconds = 0L;
}
void
bench_timer_start(struct bench_timer *self)
{
#if defined(USE_CLOCK_GETTIME)
struct timespec val;
(void) clock_gettime(CLOCK_MONOTONIC, &val);
/* With conversion from nanosecond to millisecond */
set_bench_time(&self->start, val.tv_sec, val.tv_nsec / 1000);
#elif defined(USE_MACH_ABSOLUTE_TIME)
uint64_t val;
val = mach_absolute_time();
/* With conversion from nanosecond to millisecond */
set_bench_time(&self->start,
self->scaling_factor * val / 1000000000,
self->scaling_factor * val % 1000000000 / 1000);
#else
struct timeval val;
(void) gettimeofday(&val, NULL);
set_bench_time(&self->start, val.tv_sec, val.tv_usec);
#endif
}
void
bench_timer_stop(struct bench_timer *self)
{
#if defined(USE_CLOCK_GETTIME)
struct timespec val;
(void) clock_gettime(CLOCK_MONOTONIC, &val);
/* With conversion from nanosecond to millisecond */
set_bench_time(&self->stop, val.tv_sec, val.tv_nsec / 1000);
#elif defined(USE_MACH_ABSOLUTE_TIME)
uint64_t val;
val = mach_absolute_time();
/* With conversion from nanosecond to millisecond */
set_bench_time(&self->stop,
self->scaling_factor * val / 1000000000,
self->scaling_factor * val % 1000000000 / 1000);
#else
struct timeval val;
(void) gettimeofday(&val, NULL);
set_bench_time(&self->stop, val.tv_sec, val.tv_usec);
#endif
}
void
bench_timer_get_elapsed_time(struct bench_timer *self, struct bench_time *result)
{
result->seconds = self->stop.seconds - self->start.seconds;
result->milliseconds = self->stop.milliseconds - self->start.milliseconds;
}
char *
bench_timer_get_elapsed_time_str(struct bench_timer *self)
{
struct bench_time elapsed;
char *buf;
int ret;
bench_timer_get_elapsed_time(self, &elapsed);
normalize_bench_time(&elapsed);
ret = asprintf(&buf, "%ld.%06ld", elapsed.seconds, elapsed.milliseconds);
assert(ret >= 0);
return buf;
}