Couple of porting questions

I am currently porting the uGFX LCD graphics library to eCos and have a few
questions.

1/ Is there any method of detecting from a thread handle whether the thread
that handle refers to is still runnable ie. hasn't exited or been killed?

2/ Is there any way of detecting if cyg_scheduler_start() has already been
called or, is it safe to call it multiple times with no side effects or, can
it be assumed that cyg_scheduler_start() has already been called when main()
is invoked (if the kernel is included)?

3/ Is there any approved method of halting the system (eg due to an
unrecoverable soft error) or is calling the C library exit() or _exit()
sufficient?

4/ Can stdout output be relied upon on all platforms? Is stdout and/or
stderr assumed to be a debug/monitor output stream?

Thanks,
Andrew.


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