timer.h

The main purpose of this project is to add a new scheduling algorithm to GeekOS and to implement a s

/*
 * GeekOS timer interrupt support
 * Copyright (c) 2001, David H. Hovemeyer <[e-mail]>
 * $Revision: 1.13 $
 * 
 * This is free software.  You are permitted to use,
 * redistribute, and modify it as specified in the file "COPYING".
 */

#ifndef GEEKOS_TIMER_H
#define GEEKOS_TIMER_H

#define TIMER_IRQ 0

extern volatile ulong_t g_numTicks;

typedef void (*timerCallback)(int);

void Init_Timer(void);

void Micro_Delay(int us);

typedef struct {
    int ticks;				 /* timer code decrements this */
    int id;				 /* unqiue id for this timer even */
    timerCallback callBack;		 /* Queue to wakeup on timer expire */
    int origTicks;
} timerEvent;

int Start_Timer(int ticks, timerCallback);
int Get_Remaing_Timer_Ticks(int id);
int Cancel_Timer(int id);

void Micro_Delay(int us);

#endif  /* GEEKOS_TIMER_H */