[DotGNU]implementing System.IO.FileStream.Lock/Unlock

[Stephen Compall]

Currently, these methods do nothing.  I need them working to fix a
synchronization bug in ha'comment.

Each takes two int arguments, one a start position, and the other a
count.  What is the exact behavior needed from these methods?  I could
probably fill in the bits in libILSupport, based on the glibc manual,
if I knew what was needed.

Does the lock at least have the strength of exclusive locks in GNU?
ha'comment need that strength or greater.

--
Stephen Compall or s11 or sirian

A successful [software] tool is one that was used to do something
undreamed of by its author.
                -- S. C. Johnson

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