i386/ucla/src/lab4/user/yield.c

   1 // yield the processor to other environments
   2
   3 #include <inc/lib.h>
   4
   5 asmlinkage void
   6 umain(int argc, char **argv)
   7 {
   8         int i;
   9
  10         cprintf("Hello, I am environment %08x.\n", thisenv->env_id);
  11         for (i = 0; i < 5; i++) {
  12                 sys_yield();
  13                 cprintf("Back in environment %08x, iteration %d.\n",
  14                         thisenv->env_id, i);
  15         }
  16         cprintf("All done in environment %08x.\n", thisenv->env_id);
  17 }