s="function">glMemoryBarrier</code>
            is called, the GL flushes and/or invalidates any caches relevant to the
            operations specified by the <em class="parameter"><code>barriers</code></em> parameter to ensure consistent
            ordering of operations across the barrier.
        </p>
        <p>
            To allow for independent shader invocations to communicate by reads and
            writes to a common memory address, image variables in the OpenGL ES Shading
            Language