e0dec3631f
Allow using it by other places outside this file, so we can also support callback lists in dynamically allocated structures: Those cases need to explicitly call DeleteCallbackList() before free()ing the structures - otherwise we're getting heap corruptions, because the actual deletion can happen asynchronously. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
X Server
The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server
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