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Re: [Chicken-users] Help with tokyocabinet, C const
From: |
Peter Bex |
Subject: |
Re: [Chicken-users] Help with tokyocabinet, C const |
Date: |
Thu, 31 Dec 2009 13:57:53 +0100 |
User-agent: |
Mutt/1.4.2.3i |
On Thu, Dec 31, 2009 at 01:26:40AM -0600, Evan E. wrote:
> Using easyffi, I've declared the foreign type and procedure. TCMAP is
> a hash map struct, tcmapget returns a value for a given key from the
> map object:
>
> ___declare(type, "MAP;(nonnull-c-pointer \"TCMAP\");tc-map-ptr")
> const void *tcmapget(MAP map, ___scheme_pointer kbuf, int ksiz,
> ___pointer int *sp);
It returns a pointer to the value as it's stored in the hashmap.
It does not make a copy of the value. That means you shouldn't free it!
Cheers,
Peter
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