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/*
* Demo of the gltt graphics library
* Copyright (C) 1998 Stephane Rehel
*
* January 1998
*/
#if !defined(WIN32) && !defined(__CYGWIN32__)
#include "config.h"
#endif
/* Define if you have the gettimeofday function. */
#if HAVE_GETTIMEOFDAY == 1
#include <sys/types.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#endif
#if HAVE_UNISTD_H == 1
#include <unistd.h>
#endif
#if HAVE_SELECT == 1
#if defined(__AIX__) || defined(___AIX) || defined(_AIX) || \
defined(__QNX__) || defined(___AIXV3) || defined(AIXV3) || \
defined(_SEQUENT_)
// for select() in delay()
#include <sys/select.h>
#endif
#endif
#ifdef __CYGWIN32__
// for select()
#include <sys/socket.h>
#include <windows.h>
#endif
#ifdef WIN32
#include <windows.h>
#endif
/////////////////////////////////////////////////////////////////////////////
void dsleep( double seconds )
{
if( seconds <= 0. )
return;
#ifdef __WINDOWS__
Sleep( int(seconds * 1000. + .5) );
#elif HAVE_USLEEP == 1
usleep( int(seconds * 1e6) );
#elif HAVE_SELECT == 1
struct timeval timer;
timer.tv_sec= long(seconds);
timer.tv_usec= long( (seconds-double(timer.tv_sec)) * 1e6 );
select(0,0,0,0,&timer);
#else
#error cannot compile dsleep()
#endif
}
/////////////////////////////////////////////////////////////////////////////
static double get_clock()
{
#ifdef __WINDOWS__
// gettimeofday seems not to be implemented in cygwin32 (cf. _syslist.h)
// Use: GetTickCount() = number of milliseconds since windows was started
return double(GetTickCount()) * double(1e-3);
#elif HAVE_GETTIMEOFDAY == 1
static struct timeval tv;
static struct timezone tz;
::gettimeofday( &tv, &tz );
return double(tv.tv_sec) + double(tv.tv_usec)/1e6;
#else
#error cannot compile get_clock()
#endif
}
/////////////////////////////////////////////////////////////////////////////
static double time_stamp= 0.;
void delay_begin()
{
time_stamp= get_clock();
}
/////////////////////////////////////////////////////////////////////////////
void delay_end( double seconds )
{
double time_stamp2= get_clock();
double delta= time_stamp2 - time_stamp;
dsleep( seconds - delta );
}
/////////////////////////////////////////////////////////////////////////////
static double chrono_stamp= 0.;
void chrono_start()
{
chrono_stamp= get_clock();
}
/////////////////////////////////////////////////////////////////////////////
double chrono_end()
{
return get_clock() - chrono_stamp;
}
/////////////////////////////////////////////////////////////////////////////
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