i_system.h

#ifndef __I_SYSTEM__
#define __I_SYSTEM__

#include "d_ticcmd.h"
#include "d_event.h"

#ifdef __GNUG__
#pragma interface
#endif


// Called by DoomMain.
void I_Init (void);

// Called by startup code
// to get the ammount of memory to malloc
// for the zone management.
byte*	I_ZoneBase (int *size);


// Called by D_DoomLoop,
// returns current time in tics.
int I_GetTime (void);


//
// Called by D_DoomLoop,
// called before processing any tics in a frame
// (just after displaying a frame).
// Time consuming syncronous operations
// are performed here (joystick reading).
// Can call D_PostEvent.
//
void I_StartFrame (void);


//
// Called by D_DoomLoop,
// called before processing each tic in a frame.
// Quick syncronous operations are performed here.
// Can call D_PostEvent.
void I_StartTic (void);

// Asynchronous interrupt functions should maintain private queues
// that are read by the synchronous functions
// to be converted into events.

// Either returns a null ticcmd,
// or calls a loadable driver to build it.
// This ticcmd will then be modified by the gameloop
// for normal input.
ticcmd_t* I_BaseTiccmd (void);


// Called by M_Responder when quit is selected.
// Clean exit, displays sell blurb.
void I_Quit (void);


// Allocates from low memory under dos,
// just mallocs under unix
byte* I_AllocLow (int length);

void I_Tactile (int on, int off, int total);


void I_Error (char *error, ...);


#endif