How to set a X window visible or invisible using Xlib

bool m_visible;
Display* m_display;
Window m_window;

void setVisible(bool visible)
{
    if (visible == m_visible)
        return;

    if (visible)
        XMapWindow(m_display, m_window);
    else
        XUnmapWindow(m_display, m_window);

    m_visible = visible;
}