Look free ID genertion (was: Is there a more efficient threading lock?)
Dennis Lee Bieber
wlfraed at ix.netcom.com
Thu Mar 2 11:42:03 EST 2023
On Thu, 2 Mar 2023 12:45:50 +1100, Chris Angelico <rosuav at gmail.com>
declaimed the following:
>
>As have all CPUs since; it's the only way to implement locks (push the
>locking all the way down to the CPU level).
>
Xerox Sigma (circa 1970): Modify and Test (byte/halfword/word)
Granted, that was a "mainframe" system, not a microprocessor.
Looks like Intel didn't catch the boat until 1985 and the i386.
--
Wulfraed Dennis Lee Bieber AF6VN
wlfraed at ix.netcom.com http://wlfraed.microdiversity.freeddns.org/
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