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/* ==========================================================================
Licensed under BSD 2clause license. See LICENSE file for more information
Author: Michał Łyszczek <michal.lyszczek@bofc.pl>
========================================================================== */
/* ==== Include files ======================================================= */
#include "utils.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "opts.h"
/* ==== Public functions ==================================================== */
/* ==========================================================================
function returns timestamp in 'tm' location depending on the clock set in
opts.h. If clock option set doesn't match passed 'tm' object, (like clock_t
for CLK_CLOCK) behaviour is undefinied
========================================================================== */
void ts
(
void *tm /* pointer to time where to store current timestamp */
)
{
#ifdef POSIX
if (opts.clock == CLK_REALTIME)
{
/*
* posix doesn't require CLOCK_MONOTONIC to be implemented, so we use
* CLOCK_REALTIME which may ocasionally jump forward or backward, but
* tests are relatively short, so this should not be a problem.
*/
clock_gettime(CLOCK_REALTIME, tm);
}
else
#endif
if (opts.clock == CLK_CLOCK)
{
*(clock_t *)tm = clock();
}
else
{
assert(0 && "clock not supported, should not get here");
}
}
/* ==========================================================================
creates new object for timestamp, returned pointer should be passed to
free() when it is no longer needed
========================================================================== */
void *ts_new(void)
{
#ifdef POSIX
if (opts.clock == CLK_REALTIME)
{
return malloc(sizeof(struct timespec));
}
else
#endif
if (opts.clock == CLK_CLOCK)
{
return malloc(sizeof(clock_t));
}
else
{
assert(0 && "clock not suppoert, should not get here");
}
}
/* ==========================================================================
sets pointer to zero value. Check ts() for more information regarding
undefinied behaviour that may occur
========================================================================== */
void ts_reset
(
void *tm /* time object to zero */
)
{
#ifdef POSIX
if (opts.clock == CLK_REALTIME)
{
memset(tm, 0, sizeof(struct timespec));
}
else
#endif
if (opts.clock == CLK_CLOCK)
{
memset(tm, 0, sizeof(clock_t));
}
else
{
assert(0 && "clock not supported, should not get here");
}
}
/* ==========================================================================
function adds difference between 'finish' and 'start' to 'tm'. Simply put
it is tm += finish - start; Check ts() for more information regarding
undefinied behaviour that may occur
========================================================================== */
void ts_add_diff
(
void *tm, /* finish - start will be added here */
void *start, /* first point in time to differate */
void *finish /* second point in time to differate */
)
{
#ifdef POSIX
if (opts.clock == CLK_REALTIME)
{
struct timespec d; /* diff between finish and start */
struct timespec *t; /* tm pointer */
struct timespec *s; /* start pointer */
struct timespec *f; /* finish pointer */
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
t = tm;
s = start;
f = finish;
if ((f->tv_nsec - s->tv_nsec) < 0)
{
d.tv_sec = f->tv_sec - s->tv_sec - 1;
d.tv_nsec = f->tv_nsec - s->tv_nsec + 1000000000;
}
else
{
d.tv_sec = f->tv_sec - s->tv_sec;
d.tv_nsec = f->tv_nsec - s->tv_nsec;
}
t->tv_sec += d.tv_sec;
t->tv_nsec += d.tv_nsec;
if (t->tv_nsec >= 1000000000)
{
t->tv_sec += 1;
t->tv_nsec -= 1000000000;
}
}
else
#endif
if (opts.clock == CLK_CLOCK)
{
clock_t *t; /* tm pointer */
clock_t *s; /* start pointer */
clock_t *f; /* finish pointer */
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
t = tm;
s = start;
f = finish;
*t += *f -*s;
}
else
{
assert(0 && "clock not supported, should not get here");
}
}
/* ==========================================================================
function converts 'tm' object into microseconds. Check ts() for more
information regarding undefinied behaviour that may occur
========================================================================== */
unsigned long ts2us
(
void *tm /* time to convert to microseconds */
)
{
#ifdef POSIX
if (opts.clock == CLK_REALTIME)
{
struct timespec *t = tm;
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
return t->tv_sec * 1000000l + t->tv_nsec / 1000;
}
else
#endif
if (opts.clock == CLK_CLOCK)
{
return *(clock_t *)tm / (CLOCKS_PER_SEC / 1000000);
}
else
{
assert(0 && "clock not supported, should not get here");
}
}
/* ==========================================================================
converts bytes to jedec output. ie 153600 will be converted to 150K
========================================================================== */
void bytes2jedec
(
float bytes, /* bytes to convert */
struct jedec *jedec /* bytes in jedec format */
)
{
static const int KB = 1024;
static const long MB = 1024l * 1024;
static const float GB = 1024.0 * 1024 * 1024;
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
if (bytes < 100 * KB)
{
jedec->val = bytes;
jedec->pre = '\0';
}
else if (bytes < 100l * MB)
{
jedec->val = bytes / KB;
jedec->pre = 'K';
}
else if (bytes < 100.0 * GB)
{
jedec->val = bytes / MB;
jedec->pre = 'M';
}
else
{
jedec->val = bytes / GB;
jedec->pre = 'G';
}
}
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