How to use global variables across SW Components in AUTOSAR Classic

I add Port and DataElement in each SWC for SWC(SW Components) refer and modify one common variable (e.g. sensorData).

Then there are problems.Problem 1 : Runnable in SWC need to many of RTE Read API (Rte_Read_).Problem 2 : Only recent data received by the last RTE Read API is available.

This is the code that is currently implemented

// SWC1#include "Rte_Swc.1"void Runnable_Sender1(void){    SensorData_t sensorData;    Rte_Read_Swc1_RpSender2Data_SensorData(&sensorData);    Rte_Read_Swc1_RpSender3Data_SensorData(&sensorData);    sensorData.sensorId = 1;    sensorData.sensorValue = 100;     Rte_Write_Swc1_PpSender1Data_SensorData(&sensorData);}

// SWC2#include "Rte_Swc.2"void Runnable_Sender2(void){    SensorData_t sensorData;    Rte_Read_Swc2_RpSender1Data_SensorData(&sensorData);    Rte_Read_Swc2_RpSender3Data_SensorData(&sensorData);    sensorData.sensorId = 2;    sensorData.sensorValue = 20    Rte_Write_Swc2_PpSender2Data_SensorData(&sensorData);}

// SWC3#include "Rte_Swc.3"void Runnable_Sender3(void){    SensorData_t sensorData;    Rte_Read_Swc3_RpSender1Data_SensorData(&sensorData);    Rte_Read_Swc3_RpSender2Data_SensorData(&sensorData);    sensorData.sensorId = 3;    sensorData.sensorValue = 300;     Rte_Write_Swc3_PpSender3Data_SensorData(&sensorData);}

I wonder if there is a good solution.