/*
 * Copyright (c) 2002, Stefan Farfeleder <e0026813@stud3.tuwien.ac.at>
 * $Id: clock.cc,v 1.2 2002/09/05 22:20:32 stefan Exp $
 */
#include <time.h>

#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif

#if defined(HAVE_SYS_TIME_H)
#include <sys/time.h>
#endif

#if defined(_WIN32)
#include <windows.h>
#include <winbase.h>
#endif

#include "exception.h"
#include "clock.h"

JFK::clock::clock()
    : timer(0)
{
}

void
JFK::clock::start()
{
#if defined(HAVE_GETTIMEOFDAY)
    timeval     t;

    if (gettimeofday(&t, NULL) != 0)
        throw exception_e("gettimeofday");
    timer = t.tv_sec * 1000000lu + t.tv_usec;
#elif defined(_WIN32)
    timer = GetTickCount() * 1000lu;
#else
#error "don't know how to implement clock::start()"
#endif
}

unsigned long
JFK::clock::diff()
{
    unsigned long       oldtimer = timer;

    start();

    return timer - oldtimer;
}

void
JFK::clock::delay(unsigned long micsecs)
{
#if defined(HAVE_NANOSLEEP)
    timespec        ts;

    ts.tv_sec = 0;
    ts.tv_nsec = micsecs * 1000;

    /* simply ignore EINTR */
    nanosleep(&ts, NULL);
#elif defined(_WIN32)
    Sleep(micsecs);
#else
#error "don't know how to implement clock::delay()"
#endif
}