Solaris X Window System Developer's Guide

Shared Memory Extension

The Shared Memory extension is Sun's full implementation of the X Consortium experimental Shared Memory Extension ( This extension provides the capability to share memory XImages and pixmaps by storing the actual image data in shared memory. This eliminates the need to move data through the Xlib interprocess communication channel; thus, for large images, system performance increases. This extension is useful only if the client application runs on the same machine as the server.