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Re^2: PERL issues a "lock can only be used on shared values" when locking a shared hash

by bulk88 (Priest)
on Apr 26, 2013 at 02:49 UTC ( #1030752=note: print w/replies, xml ) Need Help??


in reply to Re: PERL issues a "lock can only be used on shared values" when locking a shared hash
in thread PERL issues a "lock can only be used on shared values" when locking a shared hash

dist/threads-shared/shared.xs in perl.git, implementation is OS specific, see thread.h in perl.git and for Win32, win32/win32thread.h in perl.git. On Windows, the lock is a Critical Section which is a hybrid of atomic CPU instruction in best (usual) case, and kernel mode waiting on semaphores in worst case. Perl doesn't use multi-reader single writer locks. Patches welcome.
  • Comment on Re^2: PERL issues a "lock can only be used on shared values" when locking a shared hash

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[atcroft]: stevieb: Apparently it was contagious....
[atcroft]: james28909: Make both hands into fists, place them together (with thumbs concealed), and every knuckle is a month (starting with Jan.) has 31 days, every dip (between knuckles) does not....
[atcroft]: (And Feb. is the odd case, because it is 28, unless it is a year divisible by 4, or if it is divisible by both 100 and 400 (at which point it is 29).)
[james28909]: i know but scroll through your calendar on your computer.
[james28909]: i thiught you were going to say make both hands into a fist and puch yourself in the face
[atcroft]: .oO(Sorry, I probably should have said take two normal hands....)
[atcroft]: james28909: No, unless you are a politician, I wouldn't say that (and even if you are, I still probably wouldn't say that).
[james28909]: i mean how hard can it be? its just subtracting days lol
[atcroft]: james28909: What about October 5, 1582?
[stevieb]: atcroft: "Make both hands into fists..."... is something my Ma taught me in our native lang, but I was to ignorant and young to pay attention. Thanks for that :)

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