proc.c~

// proc.c, 159
// all processes are coded here
// processes do not use kernel data or code, must ask via service calls

#include "spede.h"       // cons_xxx below needs
#include "kernel_data.h" // run_pid needed below is OK
#include "proc.h"        // prototypes of processes
#include "syscalls.h"
//#include "syscalls.c"

void IdleProc(void) {
   int i;
   unsigned short *p = (unsigned short *)0xb8000 + 79; // upper-right corner of display
cons_printf("test");
   while(1) {
      *p = '0' + 0x0f00; // show '0' at upper-right corner
      for(i=0; i<LOOP/2; i++) asm("inb $0x80"); // delay .5 sec
      *p = ' ' + 0x0f00; // show ' ' at upper-right corner
      for(i=0; i<LOOP/2; i++) asm("inb $0x80"); // delay, can be service
   }
}

void UserProc(void) {
   int my_pid, centi_sec;
   char str[] = "   "; // either "   " or { ' ', ' ', ' ', '\0' }
   int i;
   my_pid = sys_getpid();
   centi_sec = 50 * my_pid;

   str[0] = '0' + my_pid/10;
   str[1] = '0' + my_pid%10;

   while(1) {
      sys_semwait(STDOUT);                      // if commented out?
      sys_write(STDOUT, str, 3);
      for(i=0; i<LOOP/2; i++) asm("inb $0x80"); // burn CPU time
      sys_write(STDOUT, "using ", 6);
      for(i=0; i<LOOP/2; i++) asm("inb $0x80");
      sys_write(STDOUT, "the ", 4);
      for(i=0; i<LOOP/2; i++) asm("inb $0x80");
      sys_write(STDOUT, "video... ", 9);
      sys_sempost(STDOUT);                      // if commented out?
      sys_sleep(centi_sec);                     // sleep PID x .5 sec

//sys_write(STDOUT, str, 3);   // show my PID
  //    sys_sleep(centi_sec);
   }
}