af9f70013a
The workQueue pointer is currently declared extern, so that WaitForSomething() can check wether we've got something in the queue and call ProcessWorkQueue() then. But that's trivial to simplify: just let ProcessWorkQueue() return early if workQueue == NULL. Gives us a better isolation of internal stuff as well as ProcessWorkQueue() protecting itself from possible segfault. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1310>
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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