Subject:
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Re: NQC 2.0 and some math questions
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Newsgroups:
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lugnet.robotics.rcx.nqc
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Date:
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Thu, 30 Sep 1999 21:56:00 GMT
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Viewed:
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2225 times
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Dave Baum wrote:
> My personal feeling on this, however, is that if you're running around
> changing y amd z in one task while calculating with them in another,
> you're just asking for trouble.
I think that if you do something like this you should use a semaphore
to secure no tasks access y and z simultanously. But that wastes another
variable storing the sema.
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Message has 1 Reply:
 | | Re: NQC 2.0 and some math questions
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| On semaphores... There was a lot of discussion a long time ago on whether NQC should use semaphores to protect temp variables between tasks. There isn't an atomic test-and-set bytecode, so the only way I know of implementing sempaphore would be to (...) (25 years ago, 1-Oct-99, to lugnet.robotics.rcx.nqc)
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Message is in Reply To:
| | Re: NQC 2.0 and some math questions
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| (...) That's exaclty what I was thinking of doing. Originally, the compiler had no way of allocating temp variables which is why code for % couldn't be emitted. The temp allocator is now pretty good, so I could emit the above sequence, but it just (...) (25 years ago, 30-Sep-99, to lugnet.robotics.rcx.nqc)
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