Update libcomm_adapter.cpp

src/gausskernel/cbb/communication/libcomm_utils/libcomm_adapter.cpp

@@ -322,6 +322,19 @@ static int libcomm_tcp_send(LibcommSendInfo* send_info)
     return send_bytes;
 }
 
+/*
+function name: libcomm_tcp_recv_noidx
+description: This function is used to store the message transmitted from the sender, specifically to obtain
+				    the message from a specific socket.
+arguments: recv_ info is a pointer of LibcommRecvInfo* type, pointing to the memory to store the data
+				   received.
+return value: If it fails to allocate memory for  iov_ Item, return RECV_MEM_ERROR;
+					 If  it fails to obtain data, no matter it is a message header or a message body, from the specified socket in blocking mode, return RECV_NET_ERROR; 
+                     If the function runs successfully, the byte length of the read message body is returned.
+note: none
+date: 2022/8/11
+contact tel: 18720816902
+*/
 static int libcomm_tcp_recv_noidx(LibcommRecvInfo* recv_info)
 {
     int sock = recv_info->socket;