[posix]修复消息队列返回长度异常 (#8014)

1 files changed, 6 insertions, 6 deletions

diff --git a/include/rtthread.h b/include/rtthread.h
index 4c23e43e2a..d4fea8fe7a 100644
--- a/include/rtthread.h
+++ b/include/rtthread.h
@@ -517,12 +517,12 @@ rt_err_t rt_mq_send_wait_prio(rt_mq_t mq,
                               rt_int32_t prio,
                               rt_int32_t timeout,
                               int suspend_flag);
-rt_err_t rt_mq_recv_prio(rt_mq_t mq,
-                         void *buffer,
-                         rt_size_t size,
-                         rt_int32_t *prio,
-                         rt_int32_t timeout,
-                         int suspend_flag);
+rt_ssize_t rt_mq_recv_prio(rt_mq_t mq,
+                           void *buffer,
+                           rt_size_t size,
+                           rt_int32_t *prio,
+                           rt_int32_t timeout,
+                           int suspend_flag);
 #endif /* RT_USING_MESSAGEQUEUE_PRIORITY */
 #endif /* RT_USING_MESSAGEQUEUE */