/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                               clock.c
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                                                    Forrest Yu, 2005
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

#include "type.h"
#include "const.h"
#include "protect.h"
#include "string.h"
#include "proc.h"
#include "global.h"
#include "proto.h"


/*======================================================================*
                           clock_handler
 *======================================================================*/
void clock_handler(int irq)
{
	ticks++;
	
	/* There is two stages - in kernel intializing or in process running.
	 * Some operation shouldn't be valid in kernel intializing stage.
	 * added by xw, 18/6/1
	 */
	if(kernel_initial == 1){
		return;
	}
	irq = 0;
	p_proc_current->task.ticks--;
	sys_wakeup(&ticks);
}

/*======================================================================*
                              milli_delay
 *======================================================================*/
void milli_delay(int milli_sec)
{
        int t = get_ticks();

        while(((get_ticks() - t) * 1000 / HZ) < milli_sec) {}
}