Re^5: What is PERL_COPY_ON_WRITE Compile Option About

in reply to Re^4: What is PERL_COPY_ON_WRITE Compile Option About
in thread What is PERL_COPY_ON_WRITE Compile Option About

Similar yes, but the difference is how they share memory. Threads, by definition, share memory so that changing a variable in one thread changes the the same variable in all other threads of that process.

I'm not sure where you're getting this, but the perl threads, at least in 5.8, aren't shared by default. Every process gets it's own copy of all of the variables and such, unless you explicitly share them.

Comment on Re^5: What is PERL_COPY_ON_WRITE Compile Option About

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Re^6: What is PERL_COPY_ON_WRITE Compile Option About by ikegami (Patriarch) on Mar 04, 2005 at 22:29 UTC
By the CoW explanation given earlier in the thread, it would be impossible to share them beyond the point where they change, explicitely or otherwise. One would have to use some form of IPC to share data.	[reply]

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