add kthread.h

Author: shengwen-tw

docs/6-api-list.md

@@ -273,6 +273,10 @@ Tenok API List
 
 ## Kernel-space API
 
+### Kernel Thread
+
+* kthread_create()
+
 ### Logging:
 
 * printk()

include/kernel/kernel.h

@@ -131,8 +131,6 @@ struct thread_info {
     struct list_head list;      /* Link to a scheduling list */
 };
 
-int kthread_create(task_func_t task_func, uint8_t priority, int stack_size);
-
 struct task_struct *current_task_info(void);
 struct thread_info *current_thread_info(void);
 struct thread_info *acquire_thread(int tid);

include/kernel/kthread.h

@@ -0,0 +1,20 @@
+/**
+ * @file
+ */
+#ifndef __KTHREAD_H__
+#define __KTHREAD_H__
+
+#include <kernel/task.h>
+
+/**
+ * @brief  Create new kernel task
+ * @param  task_func: Task function to run.
+ * @param  priority: Priority of the task.
+ * @param  stack_size: Stack size of the task.
+ * @retval int: The function return positive task pid number if
+ *              success; otherwise it returns a negative error
+ *              number.
+ */
+int kthread_create(task_func_t task_func, uint8_t priority, int stack_size);
+
+#endif