X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fthreads%2Fthread.h;h=7965c0607815eab3275da7babdf669177f18c8e2;hb=3edcfedb8e62970f3293fa676b6691f8658c3c11;hp=2043d8dc86e251bbd8c0492aaabc8266e935c3b9;hpb=615bf3b3d2a8573ed6fb9ddc0055745e163ac999;p=pintos-anon

diff --git a/src/threads/thread.h b/src/threads/thread.h
index 2043d8d..7965c06 100644
--- a/src/threads/thread.h
+++ b/src/threads/thread.h
@@ -20,9 +20,9 @@ typedef int tid_t;
 #define TID_ERROR ((tid_t) -1)          /* Error value for tid_t. */
 
 /* Thread priorities. */
-#define PRI_MIN 0                       /* Highest priority. */
+#define PRI_MIN 0                       /* Lowest priority. */
 #define PRI_DEFAULT 31                  /* Default priority. */
-#define PRI_MAX 63                      /* Lowest priority. */
+#define PRI_MAX 63                      /* Highest priority. */
 
 /* A kernel thread or user process.
 
@@ -88,6 +88,7 @@ struct thread
     char name[16];                      /* Name (for debugging purposes). */
     uint8_t *stack;                     /* Saved stack pointer. */
     int priority;                       /* Priority. */
+    struct list_elem allelem;           /* List element for all threads list. */
 
     /* Shared between thread.c and synch.c. */
     struct list_elem elem;              /* List element. */
@@ -101,6 +102,11 @@ struct thread
     unsigned magic;                     /* Detects stack overflow. */
   };
 
+/* If false (default), use round-robin scheduler.
+   If true, use multi-level feedback queue scheduler.
+   Controlled by kernel command-line option "-o mlfqs". */
+extern bool thread_mlfqs;
+
 void thread_init (void);
 void thread_start (void);
 
@@ -120,6 +126,10 @@ const char *thread_name (void);
 void thread_exit (void) NO_RETURN;
 void thread_yield (void);
 
+/* Performs some operation on thread t, given auxiliary data AUX. */
+typedef void thread_action_func (struct thread *t, void *aux);
+void thread_foreach (thread_action_func *, void *);
+
 int thread_get_priority (void);
 void thread_set_priority (int);