I'm having a problem using TMapFiles to communicate between two
processes on NT4.
Since I want two-way communication, each process (let's call them
A and B) "RECREATE"'s a mapfile for writing to the other process
and then "READ"'s the other process's file.
so we have two mapfiles showing up:
1. c:\AtoB.map
2. c:\BtoA.map
Now suppose process A crashes while B is reading AtoB.map. In
principle, B can detect this and Close() the mapfile which is
dealing with reading AtoB.map. Then when A comes back, it can
again perform a "RECREATE" on c:\AtoB.map and then B can reopen it.
However, this does _not_ work. Even after closing the mapfile object
which performs the read (the docs say not to delete the object!) i
am unable to recreate it -- the error is:
Error in <TMapFile::TMapFile>: file c:\AtoB.map already exists
Is this a bug or feature?
Regards,
Peter
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Peter Steinberg, Columbia University mailto:Peter.Steinberg@Cern.ch
Nevis Laboratories + http://www.nevis.columbia.edu/~steinber
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