/usr/include/crystalspace-2.0/iutil/virtclk.h is in libcrystalspace-dev 2.0+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (C) 2001 by Jorrit Tyberghein
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __CS_IUTIL_VIRTCLK_H__
#define __CS_IUTIL_VIRTCLK_H__
/**\file
* Virtual clock interface
*/
#include "csutil/scf_interface.h"
/**
* A virtual game clock. Normally, a single instance of iVirtualClock is
* placed in the shared object registry (iObjectRegistry).
*
* Main creators of instances implementing this interface:
* - csInitializer::CreateEnvironment()
* - csInitializer::CreateVirtualClock()
*
* Main ways to get pointers to this interface:
* - csQueryRegistry()
*/
struct iVirtualClock : public virtual iBase
{
SCF_INTERFACE(iVirtualClock, 2,0,0);
/**
* Advance the engine's virtual-time clock.
*/
virtual void Advance () = 0;
/**
* Suspend the engine's virtual-time clock.<p>
* Call this function when the client application will fail to call Advance()
* for an extended period of time. Suspending the virtual-time clock
* prevents a temporal anomaly from occurring the next time GetElapsedTicks()
* is called after the application resumes invoking Advance().
*/
virtual void Suspend () = 0;
/**
* Resume the engine's virtual-time clock.<p>
* Call this function when the client application begins invoking Advance()
* again after extended down-time. This function is the complement of
* Suspend().
*/
virtual void Resume () = 0;
/**
* Query the time elapsed between the two most recent invocations of
* Advance().
*/
virtual csTicks GetElapsedTicks () const = 0;
/**
* Returns the absolute time of the last call to Advance().
* For game logic you should always use this function instead of
* csGetTicks().
*/
virtual csTicks GetCurrentTicks () const = 0;
};
#endif // __CS_IUTIL_VIRTCLK_H__
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