[hal] Fix unfinished/incorrect GetCPUTemp functions (#5598)

hal/src/main/native/cpp/jni/simulation/RoboRioDataJNI.cpp

@@ -828,6 +828,56 @@ Java_edu_wpi_first_hal_simulation_RoboRioDataJNI_setBrownoutVoltage
   HALSIM_SetRoboRioBrownoutVoltage(value);
 }
 
+/*
+ * Class:     edu_wpi_first_hal_simulation_RoboRioDataJNI
+ * Method:    registerCPUTempCallback
+ * Signature: (Ljava/lang/Object;Z)I
+ */
+JNIEXPORT jint JNICALL
+Java_edu_wpi_first_hal_simulation_RoboRioDataJNI_registerCPUTempCallback
+  (JNIEnv* env, jclass, jobject callback, jboolean initialNotify)
+{
+  return sim::AllocateCallbackNoIndex(env, callback, initialNotify,
+                                      &HALSIM_RegisterRoboRioCPUTempCallback);
+}
+
+/*
+ * Class:     edu_wpi_first_hal_simulation_RoboRioDataJNI
+ * Method:    cancelCPUTempCallback
+ * Signature: (I)V
+ */
+JNIEXPORT void JNICALL
+Java_edu_wpi_first_hal_simulation_RoboRioDataJNI_cancelCPUTempCallback
+  (JNIEnv* env, jclass, jint handle)
+{
+  return sim::FreeCallbackNoIndex(env, handle,
+                                  &HALSIM_CancelRoboRioCPUTempCallback);
+}
+
+/*
+ * Class:     edu_wpi_first_hal_simulation_RoboRioDataJNI
+ * Method:    getCPUTemp
+ * Signature: ()D
+ */
+JNIEXPORT jdouble JNICALL
+Java_edu_wpi_first_hal_simulation_RoboRioDataJNI_getCPUTemp
+  (JNIEnv*, jclass)
+{
+  return HALSIM_GetRoboRioCPUTemp();
+}
+
+/*
+ * Class:     edu_wpi_first_hal_simulation_RoboRioDataJNI
+ * Method:    setCPUTemp
+ * Signature: (D)V
+ */
+JNIEXPORT void JNICALL
+Java_edu_wpi_first_hal_simulation_RoboRioDataJNI_setCPUTemp
+  (JNIEnv*, jclass, jdouble cpuTemp)
+{
+  HALSIM_SetRoboRioCPUTemp(cpuTemp);
+}
+
 /*
  * Class:     edu_wpi_first_hal_simulation_RoboRioDataJNI
  * Method:    getSerialNumber