sched: add thread status flags

include/socks/sched.h

@@ -17,11 +17,16 @@ typedef enum task_state {
 } task_state_t;
 
 typedef enum thread_state {
-	THREAD_READY,
-	THREAD_SLEEPING,
-	THREAD_STOPPED,
+	THREAD_READY    = 1,
+	THREAD_SLEEPING = 2,
+	THREAD_STOPPED  = 3,
 } thread_state_t;
 
+typedef enum thread_flags {
+	THREAD_F_NEED_RESCHED = 0x01u,
+	THREAD_F_NO_PREEMPT   = 0x02u,
+} thread_flags_t;
+
 typedef enum sched_priority {
     PRIO_IDLE        = 4,
     PRIO_SUBNORMAL   = 6,
@@ -45,7 +50,8 @@ typedef struct task {
 } task_t;
 
 typedef struct thread {
-	thread_state_t tr_state;
+	thread_state_t tr_state : 8;
+	thread_flags_t tr_flags : 8;
 	task_t *tr_parent;
 
 	unsigned int tr_id;