sched: add struct and object types for task and thread objects

include/socks/sched.h

@@ -0,0 +1,43 @@
+#ifndef SOCKS_SCHED_H_
+#define SOCKS_SCHED_H_
+
+#include <socks/pmap.h>
+#include <socks/queue.h>
+#include <socks/btree.h>
+#include <socks/status.h>
+
+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 struct task {
+	struct task *t_parent;
+	unsigned int t_id;
+	task_state_t t_state;
+
+	pmap_t t_pmap;
+
+	btree_node_t t_tasklist;
+	queue_t t_threads;
+	queue_t t_children;
+} task_t;
+
+typedef struct task_thread {
+	task_thread_state_t tr_state;
+	unsigned int tr_id;
+	unsigned int tr_prio;
+
+	queue_entry_t tr_threads;
+	void *tr_kstack;
+} task_thread_t;
+
+extern kern_status_t sched_init(void);
+
+#endif