Rearrange files to prepare to merge into Ray.

src/common/state/task_table.h

@@ -0,0 +1,20 @@
+#ifndef TASK_TABLE_H
+#define TASK_TABLE_H
+
+#include "db.h"
+#include "task.h"
+
+/* Add task to the task table, handle errors here. */
+status task_table_add_task(db_handle *db, task_spec *task);
+
+/* Callback for getting an entry from the task table. Task spec will be freed
+ * by the system after the callback */
+typedef void (*task_table_callback)(task_spec *task, void *context);
+
+/* Get specific task from the task table. */
+status task_table_get_task(db_handle *db,
+                           task_id task_id,
+                           task_table_callback callback,
+                           void *context);
+
+#endif /* TASK_TABLE_H */