I finally finished the reorganization of sysdep code I started last weekend:
1) last weekend I separated the sysdep code into various pieces in the
sysdep/ directory, organized by "topic" and OS, and duplicated events.c
(previously considered non-system-dependent, but actually relying
heavily on POSIX features) into sysdep/posix/events.c and
sysdep/win32/events.c.
2) now I rewrote sysdep/win32/events.c to use native Win32 APIs; so I
was also able to figure out the common parts, and move them back to
libgst/events.c.
The Win32 code is still not very commented and not very readable; the
approach is totally different from POSIX because it signals Smalltalk
semaphores from a separate thread rather than from signal handlers. In
the future, however, this may turn out to be the way to go even for
POSIX (via libevent)!
While I wrote the code independently, after the fact I noticed that
putty uses the same approach. This cannot be bad.
3) at the same time, sockets became a bit more intertwined with the
event handling machinery, so I moved socket code into the main DLL. You
will still have to load the Sockets.star package (it's just the C module
that is no more).
The good news are threefolded. First, the POSIX code sees just
functions moving around; the actually code is basically untouched. This
is good for stability. Second, some very ugly code for Win32 (the
emulation of poll, and signalx.*) goes away: the net effect is like -600
lines of code. Third, despite extremely light testing, it is less buggy
than before---at least "Sockets.Socket microTest" works.
Besides including VisualGST, I think we're now feature-complete for 3.2.
Paolo
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