add semaphore max value control. (#8390)

1 files changed, 2 insertions, 1 deletions

diff --git a/include/rtdef.h b/include/rtdef.h
index 4c24cb0ae9..a1d858182e 100644
--- a/include/rtdef.h
+++ b/include/rtdef.h
@@ -1038,6 +1038,7 @@ typedef struct rt_thread *rt_thread_t;
 #define RT_IPC_CMD_UNKNOWN              0x00            /**< unknown IPC command */
 #define RT_IPC_CMD_RESET                0x01            /**< reset IPC object */
 #define RT_IPC_CMD_GET_STATE            0x02            /**< get the state of IPC object */
+#define RT_IPC_CMD_SET_VLIMIT           0x03            /**< set max limit value of IPC value */
 
 #define RT_WAITING_FOREVER              -1              /**< Block forever until get resource. */
 #define RT_WAITING_NO                   0               /**< Non-block. */
@@ -1061,7 +1062,7 @@ struct rt_semaphore
     struct rt_ipc_object parent;                        /**< inherit from ipc_object */
 
     rt_uint16_t          value;                         /**< value of semaphore. */
-    rt_uint16_t          reserved;                      /**< reserved field */
+    rt_uint16_t          max_value;
     struct rt_spinlock   spinlock;
 };
 typedef struct rt_semaphore *rt_sem_t;