线程错误代码的定义在文件 rt-thread/include/rtdef.h 中
/* RT-Thread error code definitions */
#define RT_EOK 0 /**< There is no error */
#define RT_ERROR 1 /**< A generic error happens */
#define RT_ETIMEOUT 2 /**< Timed out */
#define RT_EFULL 3 /**< The resource is full */
#define RT_EEMPTY 4 /**< The resource is empty */
#define RT_ENOMEM 5 /**< No memory */
#define RT_ENOSYS 6 /**< No system */
#define RT_EBUSY 7 /**< Busy */
#define RT_EIO 8 /**< IO error */
#define RT_EINTR 9 /**< Interrupted system call */
#define RT_EINVAL 10 /**< Invalid argument */