Keean Schupke wrote:
Adrian Hey wrote:
The first step to solving a problem is to at least recognise
that it exists. What is "bizarre" is that so many folk seem
to be in denial over this. Perhaps you would like to show
me your solution to the "oneShot" problem.
Why are you unable to give a concrete real world
example of why this is necessary then. Even your
example of real world hardware that must be
initialised once fails! (What if I start two copies
of the program?)
Indeed. With hardware the solution is to do
hdl <- openDevice
which will succeed the first time and then return
"busy" until closed. Any access to the device must
use the hdl. Trying to do without the handle is just
shooting yourself in the foot. It might look good at
first, but it doesn't scale.
-- Lennart
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