JNIEXPORT jint JNICALL Java_org_simgrid_msg_Task_listenFromHost(JNIEnv* env, jclass cls, jstring jalias, jobject jhost);
JNIEXPORT jint JNICALL Java_org_simgrid_msg_Task_listenFrom(JNIEnv* env, jclass cls, jstring jalias);
JNIEXPORT jint JNICALL Java_org_simgrid_msg_Task_listenFromHost(JNIEnv* env, jclass cls, jstring jalias, jobject jhost);
JNIEXPORT jint JNICALL Java_org_simgrid_msg_Task_listenFrom(JNIEnv* env, jclass cls, jstring jalias);