If vlc_cancel() while the timer thread is between mwait() and
vlc_mutex_lock(), a dead lock would occur at vlc_join(). We need to
release the timer lock first.

Invoking
python vlc.py filename.avi
will play the given movie.

It would be nice if its syntax was the same as all other enums...

Pointed-out-by: Taylor Venable

(and also remove an unneeded include).

At the moment it doesn't handle those size/bold/* stuff, only takes font
from it. But IMO still better than old file-choosing way.

Parameter is default, so no need to tell it here.

according to doc, thisway view should be able to do some optimisation
over itself, and I didn't figure out anycase that rows wouldn't be same
height on playlist.

Previously, the core would fallback to other demux plugins which was
inefficient and error-prone.

A plugin can use this if it matched but detected a non-recoverable error
while inside the open callback. Help yourself if you want a "better"
error code.

exit() cannot return negative numbers (the high-order bits are ignored).
And anyway, that's not a meanigful place for VLC error codes. It is also
questionable whether we should exit() from LibVLC anyway...

This is consistent with existing practice inside and outside of VLC.
We really don't need a separate error code for that.

Nothing can really kill VLC when browsing plugins, since nothing has
started.

This should be more clearer to user what column is used to sort (eg if
it's hidden, then hide sortIndicator also).

If you setSortingEnabled after setting model, it doesn't call sorting,
otherway around it does. Missed thatone on previous try.

This is inefficient. It could be optimized a lot with
epoll/timerfd on Linux and kqueue/kevent on BSD. Unfortunately, the
POSIX timer API is impossible to use in a thread-safe manner, other
than with signals.

Note that this can only be used safely in the core. In a plug-in, it
would introduce a race whereby dlclose() unmaps the code segment that
a detached thread is running (this was discussed over a year ago).
For that, we'd need something a bit more involved along the lines of
Win32's FreeLibraryAndExitThread().

This is never used currently. Removing it simplifies the next commits.