// fg_timer.hxx -- time handling routines
//
// Written by Curtis Olson, started June 1997.
//
// Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
// (Log is kept at end of this file)


#ifndef _FG_TIMER_HXX
#define _FG_TIMER_HXX


#ifndef __cplusplus                                                          
# error This library requires C++
#endif                                   


extern unsigned long int fgSimTime;

// this routine initializes the interval timer to generate a SIGALRM
// after the specified interval (dt) the function f() will be called
// at each signal
void fgTimerInit( float dt, void (*f)( int ) );

// This function returns the number of milleseconds since the last
// time it was called.
int fgGetTimeInterval( void );


#endif // _FG_TIMER_HXX


// $Log$
// Revision 1.2  1999/04/06 16:58:35  curt
// Clean ups and reorganizations:
// - Additional Thanks entry
// - more info on getting gfc library
// - converted some C style comments to C++ style.
//
// Revision 1.1.1.1  1999/04/05 21:32:47  curt
// Start of 0.6.x branch.
//
// Revision 1.1  1998/04/24 00:52:30  curt
// Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
// Fog color fixes.
// Separated out lighting calcs into their own file.
//
// Revision 1.5  1998/04/21 17:01:45  curt
// Fixed a problems where a pointer to a function was being passed around.  In
// one place this functions arguments were defined as ( void ) while in another
// place they were defined as ( int ).  The correct answer was ( int ).
//
// Prepairing for C++ integration.
//
// Revision 1.4  1998/01/22 02:59:43  curt
// Changed #ifdef FILE_H to #ifdef _FILE_H
//
// Revision 1.3  1998/01/19 18:40:40  curt
// Tons of little changes to clean up the code and to remove fatal errors
// when building with the c++ compiler.
//
// Revision 1.2  1997/07/23 21:52:27  curt
// Put comments around the text after an #endif for increased portability.
//
// Revision 1.1  1997/06/16 19:24:20  curt
// Initial revision.
//