Re^3: Inline::C demonstration for C programmers

I'm actually having second thoughts. The program, in this case, is the DLL created and loaded by Inline::C. If the DLL is unloaded, then doesn't the pointer become invalid?

That still wouldn't be a problem here since the pointer to the string will be discarded before inflect returns control to Perl (having created an SV holding a copy of the string), and thus before Inline::C has a chance to unload the DLL.

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Re^4: Inline::C demonstration for C programmers by missingthepoint (Friar) on Sep 03, 2008 at 02:07 UTC
If the DLL is unloaded, then doesn't the pointer become invalid? Yep, at least on my OS. In abstract terms, the virtual memory mapping for that DLL is removed when it's unloaded, and any pointers to memory in the range corresponding to that DLL's mapping are now junk. That still wouldn't be a problem here... I'll take your word for it, since I have to. My perl internals knowledge is pretty much 0. :) However, if I've actually misused Inline::C I'd be happy for someone to point it out. email: perl -e 'print reverse map { chr( ord($_)-1 ) } split //, "\x0bufo/hojsfufqAofc";'	[reply]

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Re^4: Inline::C demonstration for C programmers
by missingthepoint (Friar) on Sep 03, 2008 at 02:07 UTC

If the DLL is unloaded, then doesn't the pointer become invalid?

Yep, at least on my OS. In abstract terms, the virtual memory mapping for that DLL is removed when it's unloaded, and any pointers to memory in the range corresponding to that DLL's mapping are now junk.

That still wouldn't be a problem here...

I'll take your word for it, since I have to. My perl internals knowledge is pretty much 0. :) However, if I've actually misused Inline::C I'd be happy for someone to point it out.

email: perl -e 'print reverse map { chr( ord($_)-1 ) } split //, "\x0bufo/hojsfufqAofc";'

[reply]