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#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include "benchmark.h"
int benchmark_must_finish = 0;
#if defined(_WIN32)
#include <windows.h>
DWORD WINAPI
alarm_handler (LPVOID lpParameter)
{
HANDLE wtimer = *((HANDLE *) lpParameter);
WaitForSingleObject (wtimer, INFINITE);
benchmark_must_finish = 1;
return 0;
}
#else
static void
alarm_handler (int signo)
{
benchmark_must_finish = 1;
}
#endif
static void
value2human (unsigned long bytes, double time, double *data, double *speed,
char *metric)
{
if (bytes > 1000 && bytes < 1000 * 1000)
{
*data = ((double) bytes) / 1000;
*speed = *data / time;
strcpy (metric, "KB");
return;
}
else if (bytes >= 1000 * 1000 && bytes < 1000 * 1000 * 1000)
{
*data = ((double) bytes) / (1000 * 1000);
*speed = *data / time;
strcpy (metric, "MB");
return;
}
else if (bytes >= 1000 * 1000 * 1000)
{
*data = ((double) bytes) / (1000 * 1000 * 1000);
*speed = *data / time;
strcpy (metric, "GB");
return;
}
else
{
*data = (double) bytes;
*speed = *data / time;
strcpy (metric, "bytes");
return;
}
}
void start_benchmark(struct benchmark_st * st)
{
memset(st, 0, sizeof(*st));
st->old_handler = signal (SIGALRM, alarm_handler);
gettime (&st->start);
benchmark_must_finish = 0;
#if defined(_WIN32)
st->wtimer = CreateWaitableTimer (NULL, TRUE, NULL);
if (st->wtimer == NULL)
{
fprintf (stderr, "error: CreateWaitableTimer %u\n", GetLastError ());
exit(1);
}
st->wthread = CreateThread (NULL, 0, alarm_handler, &st->wtimer, 0, NULL);
if (st->wthread == NULL)
{
fprintf (stderr, "error: CreateThread %u\n", GetLastError ());
exit(1);
}
alarm_timeout.QuadPart = (5) * 10000000;
if (SetWaitableTimer (st->wtimer, &alarm_timeout, 0, NULL, NULL, FALSE) == 0)
{
fprintf (stderr, "error: SetWaitableTimer %u\n", GetLastError ());
exit(1);
}
}
#else
alarm (5);
#endif
}
/* returns the elapsed time */
double stop_benchmark(struct benchmark_st * st, const char* metric)
{
double secs;
struct timespec stop;
double dspeed, ddata;
char imetric[16];
#if defined(_WIN32)
if (st->wtimer != NULL)
CloseHandle (st->wtimer);
if (st->wthread != NULL)
CloseHandle (st->wthread);
#else
signal(SIGALRM, st->old_handler);
#endif
gettime (&stop);
secs = (stop.tv_sec * 1000 + stop.tv_nsec / (1000 * 1000) -
(st->start.tv_sec * 1000 + st->start.tv_nsec / (1000 * 1000)));
secs /= 1000;
if (metric == NULL)
{ /* assume bytes/sec */
value2human (st->size, secs, &ddata, &dspeed, imetric);
printf ("Processed %.2f %s in %.2f secs: ", ddata, imetric, secs);
printf ("%.2f %s/sec\n", dspeed, imetric);
}
else
{
ddata = (double) st->size;
dspeed = ddata / secs;
printf ("Processed %.2f %s in %.2f secs: ", ddata, metric, secs);
printf ("%.2f %s/sec\n", dspeed, metric);
}
return secs;
}
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