implement thread_get_nice & thread_get_recent_cpu

src/threads/thread.c

@@ -4,6 +4,7 @@
 #include <random.h>
 #include <stdio.h>
 #include <string.h>
+#include "threads/fixed-point.h"
 #include "threads/flags.h"
 #include "threads/interrupt.h"
 #include "threads/intr-stubs.h"
@@ -375,8 +376,7 @@ thread_set_nice (int nice UNUSED)
 int
 thread_get_nice (void) 
 {
-  /* Not yet implemented. */
-  return 0;
+  return thread_current ()->nice;
 }
 
 /* Returns 100 times the system load average. */
@@ -391,8 +391,7 @@ thread_get_load_avg (void)
 int
 thread_get_recent_cpu (void) 
 {
-  /* Not yet implemented. */
-  return 0;
+  return fp_round (fp_mul_int (thread_current ()->recent_cpu, 100));
 }
 
 /* Idle thread.  Executes when no other thread is ready to run.

src/threads/thread.h

@@ -4,6 +4,7 @@
 #include <debug.h>
 #include <list.h>
 #include <stdint.h>
+#include "threads/fixed-point.h"
 
 /* States in a thread's life cycle. */
 enum thread_status
@@ -95,7 +96,7 @@ struct thread
 
     /* MLFQS items */
     int nice;                           /* Nice value for this thread */
-    int32_t recent_cpu;                 /* Amount of time this process received */
+    fp32_t recent_cpu; /* Amount of time this process received */
 
 #ifdef USERPROG
     /* Owned by userprog/process.c. */