#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.
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. */
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);
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);