+JNIEXPORT void JNICALL Java_org_simgrid_msg_Comm_waitCompletion(JNIEnv *env, jobject jcomm, jdouble timeout);
+JNIEXPORT void JNICALL Java_org_simgrid_msg_Comm_waitAll(JNIEnv *env, jclass cls, jobjectArray jcomms, jdouble timeout);
+JNIEXPORT int JNICALL Java_org_simgrid_msg_Comm_waitAny(JNIEnv *env, jclass cls, jobjectArray jcomms);