diff --git a/osal/inc/mpp_list.h b/osal/inc/mpp_list.h
index 6e5fbd77..ba34349b 100644
--- a/osal/inc/mpp_list.h
+++ b/osal/inc/mpp_list.h
@@ -18,6 +18,7 @@
 #define __MPP_LIST_H__
 
 #include "rk_type.h"
+#include "mpp_err.h"
 
 #include "mpp_thread.h"
 
@@ -64,6 +65,10 @@ public:
 
     RK_S32 flush();
 
+    // for list wait
+    MPP_RET wait_lt(RK_S64 timeout, RK_S32 val);
+    MPP_RET wait_gt(RK_S64 timeout, RK_S32 val);
+
 private:
     node_destructor         destroy;
     struct mpp_list_node    *head;
diff --git a/osal/mpp_list.cpp b/osal/mpp_list.cpp
index 3f8eab5e..a747c63c 100644
--- a/osal/mpp_list.cpp
+++ b/osal/mpp_list.cpp
@@ -299,6 +299,38 @@ RK_S32 mpp_list::flush()
     return 0;
 }
 
+MPP_RET mpp_list::wait_lt(RK_S64 timeout, RK_S32 val)
+{
+    if (list_size() <= val)
+        return MPP_OK;
+
+    if (!timeout)
+        return MPP_NOK;
+
+    if (timeout < 0)
+        wait();
+    else
+        wait(timeout);
+
+    return list_size() <= val ? MPP_OK : MPP_NOK;
+}
+
+MPP_RET mpp_list::wait_gt(RK_S64 timeout, RK_S32 val)
+{
+    if (list_size() >= val)
+        return MPP_OK;
+
+    if (!timeout)
+        return MPP_NOK;
+
+    if (timeout < 0)
+        wait();
+    else
+        wait(timeout);
+
+    return list_size() >= val ? MPP_OK : MPP_NOK;
+}
+
 RK_U32 mpp_list::get_key()
 {
     return keys++;