sched: add task and thread alloc functions

include/socks/sched.h

@@ -2,25 +2,40 @@
 #define SOCKS_SCHED_H_
 
 #include <socks/pmap.h>
+#include <socks/locks.h>
 #include <socks/queue.h>
+#include <socks/object.h>
 #include <socks/btree.h>
 #include <socks/status.h>
 
+#define TASK_NAME_MAX 64
+#define PRIO_MAX 32
+
 typedef enum task_state {
 	TASK_RUNNING,
 	TASK_STOPPED,
 } task_state_t;
 
-typedef enum task_thread_state {
-	TASK_THREAD_READY,
-	TASK_THREAD_SLEEPING,
-	TASK_THREAD_STOPPED,
-} task_thread_state_t;
+typedef enum thread_state {
+	THREAD_READY,
+	THREAD_SLEEPING,
+	THREAD_STOPPED,
+} thread_state_t;
+
+typedef enum sched_priority {
+    PRIO_IDLE        = 4,
+    PRIO_SUBNORMAL   = 6,
+    PRIO_NORMAL      = 10,
+    PRIO_SUPERNORMAL = 14,
+    PRIO_HIGH        = 18,
+    PRIO_REALTIME    = 24,
+} sched_priority_t;
 
 typedef struct task {
 	struct task *t_parent;
 	unsigned int t_id;
 	task_state_t t_state;
+	char t_name[TASK_NAME_MAX];
 
 	pmap_t t_pmap;
 
@@ -29,15 +44,41 @@ typedef struct task {
 	queue_t t_children;
 } task_t;
 
-typedef struct task_thread {
-	task_thread_state_t tr_state;
+typedef struct thread {
+	thread_state_t tr_state;
+	task_t *tr_parent;
+	
 	unsigned int tr_id;
 	unsigned int tr_prio;
 
 	queue_entry_t tr_threads;
+	queue_entry_t tr_rqentry;
 	void *tr_kstack;
-} task_thread_t;
+} thread_t;
+
+typedef struct runqueue {
+	queue_t rq_queues[PRIO_MAX];
+	uint32_t rq_readybits;
+	spin_lock_t rq_lock;
+} runqueue_t;
 
 extern kern_status_t sched_init(void);
 
+extern task_t *task_alloc(void);
+static inline task_t *task_ref(task_t *task) { return object_data(object_ref(object_header(task))); }
+static inline void task_deref(task_t *task) { object_deref(object_header(task)); }
+extern task_t *task_from_pid(unsigned int pid);
+
+static inline void task_lock_irqsave(task_t *task, unsigned long *flags)
+{
+	object_lock(object_header(task), flags);
+}
+
+static inline void task_unlock_irqrestore(task_t *task, unsigned long flags)
+{
+	object_unlock(object_header(task), flags);
+}
+
+extern thread_t *thread_alloc(void);
+
 #endif