08-01-2007
One technique is to use a thread to read and a thread to write, however what consider what is the purpose of a thread to write when it will be idle 99% of the time. You could have a thread per port which still uses a select().
Personally I would do the single select statement and no threads as this is the most portable solution, select() will tell you when each port needs to be read, and you would manage your own buffers. You would hook in a select() for the write mask only when you have data queued to write out.
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