[ab] SDL and polling based Slime

[Luke Crook]

Brad Beveridge <brad.beveridge at ...> writes:

> I'll enable threads for my SBCL.  Worse luck!  Now my sdl-rects
> example doesn't even bring a window up (though, breaking out now
> works).
> If I load the example from the REPL then all works fine.  I guess that
> I am getting some borkedness from Slime's technique of spawning a new
> thread for each command.  The thread that starts the cocoa stuff up is
> therefore not in the main thread :(

Lispworks has a single thread that services the REPL. Each M-x-e command is 
spawned off into a different thread.

In win32, the thread that creates the window must also services events - this 
is not true for Linux but it may be true for OSX, I don't know.

So it is possible to first create an SDL window in the REPL and then start the 
SDL event loop. But creating the window in the REPL, and M-x-e in an Emacs 
buffer to start the SDL event loop will not work as these are two different 
threads.

But, the SDL window should at least appear regardless.

- Luke