[PATCH-RFC]: cancellation-safe(r) STDIO streams.

[Guillaume Autran]

This patch fixes the stdio stream locking issue that happen when a thread gets 
cancel while printing to an iostream. At that point, the iostream lock would 
never be released.

The patch implements deferred cancellation + cleanup_push/cleanup_pop before and 
after the iostream locking takes place.


Guillaume.


-- 
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Guillaume Autran
Senior Software Engineer
MRV Communications, Inc.
Tel: (978) 952-4932 office
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