#ifndef __AUTOCURSOR__

#define __AUTOCURSOR__

/*---------------------------------------------------------------------------------------

//  File:       AutoCursor.h

//  Date:       July 12, 1989

//

//  Mods:       Apr  16, 1990        JMP        Completely revised.

//

//  By Mike Puckett, Macintosh CPU Software Quality, x4-1332.

//  ©Ê1989 - 1990, Apple Computer, Inc.

//---------------------------------------------------------------------------------------

*/

/* Data Structures ----------------------------------------------------------------------

*/

typedef struct ACRecord                         /* ACRecord is NOT public at this time. */

*AutoCursor;

#define kACMinThreshTicks   60L                 /* For some machines, <1 sec looks bad. */

#define kACStdThreshTicks   120L                /* About every 2 seconds.               */

#define kACStdSpinTicks     12L                 /* About every 1/5th second.            */

#define rACStdACURID        (short)256          /* Seemed like a good number to me.     */

/* The WaitNextEvent yield time should be SOMEWHAT less than the threshold value,

// otherwise the timer will go off too soon and the animation will kick in when

// the app is NOT busy.  The following formula seems to work pretty well when

// tt >= 120L (tt is threshold ticks).

*/

#define AC_WNE_YIELD(tt)    ((tt) >> 2)

/* Constants for use with AutoCursorCommand()É

*/

enum

{   acUpdtThreshTicks = 1,

    acUpdtSpinTicks,

    acGetThreshTicks,

    acGetSpinTicks,

    acForceBusy,

    acForceIdle

    };

/* AutoCursorCommand() MacrosÉ

*/

#define AC_GETTHRESTICKS    acGetThreshTicks,   nil

#define AC_GETSPINTICKS     acGetSpinTicks,     nil

#define AC_FORCEBUSY        acForceBusy,        nil

#define AC_FORCEIDLE        acForceIdle,        nil

/* The Routines  ------------------------------------------------------------------------

*/

#ifdef __safe_link

extern "C" {

#endif

extern pascal   AutoCursor      InstAutoCursor(     short           acurRsrcID,

                                                    unsigned long   threshTicks,

                                                    unsigned long   spinTicks);

extern pascal   void            PrmeAutoCursor(     AutoCursor      autoCursor);

extern pascal   void            RmveAutoCursor(     AutoCursor      autoCursor);

extern pascal   void            ImmedAutoCursor(    AutoCursor      autoCursor);

extern pascal   void            SuspendAutoCursor(  AutoCursor      autoCursor);

extern pascal   void            ResumeAutoCursor(   AutoCursor      autoCursor);

extern pascal   long            AutoCursorCommand(  AutoCursor      autoCursor,

                                                    short           acCommand,

                                                    long            acParam);

#ifdef __safe_link

}

#endif

#endif /* __AUTOCURSOR__ */