arg = 2;
	if ((objc == 4) || (objc == 5)) {
	    if (strcmp("-unwind", Tcl_GetString(objv[arg])) == 0) {
		flags = TCL_CANCEL_UNWIND;
		arg++;
	    }
	}
	if (Tcl_GetWideIntFromObj(interp, objv[arg], &id) != TCL_OK) {
	    return TCL_ERROR;
	}
	arg++;
	if (arg < objc) {
	    result = Tcl_GetString(objv[arg]);
	} else {
	    result = NULL;

	Tcl_WideInt id;
	int result, status;

	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "id");
	    return TCL_ERROR;
	}
	if (Tcl_GetWideIntFromObj(interp, objv[2], &id) != TCL_OK) {
	    return TCL_ERROR;
	}

	result = Tcl_JoinThread((Tcl_ThreadId)(size_t)id, &status);
	if (result == TCL_OK) {
	    Tcl_SetIntObj(Tcl_GetObjResult(interp), status);
	} else {

	    }
	    wait = 0;
	    arg = 3;
	} else {
	    wait = 1;
	    arg = 2;
	}
	if (Tcl_GetWideIntFromObj(interp, objv[arg], &id) != TCL_OK) {
	    return TCL_ERROR;
	}
	arg++;
	script = Tcl_GetString(objv[arg]);
	return ThreadSend(interp, (Tcl_ThreadId)(size_t)id, script, wait);
    }
    case THREAD_EVENT: {