From: Robin Barker <RMBarker@cpan.org>
Date: Tue, 4 Jan 2005 12:32:29 +0000 (+0000)
Subject: RE: [perl #32660] INT2PTR not mentioned in perlxs(1)
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=049cb4115f5677ea81b63ce0025e2bc136637c77;p=p5sagit%2Fp5-mst-13.2.git

RE: [perl #32660] INT2PTR not mentioned in perlxs(1)
Message-ID: <533D273D4014D411AB1D00062938C4D90849C553@hotel.npl.co.uk>

p4raw-id: //depot/perl@23742
---

diff --git a/pod/perlxs.pod b/pod/perlxs.pod
index c09947d..a819697 100644
--- a/pod/perlxs.pod
+++ b/pod/perlxs.pod
@@ -1833,7 +1833,7 @@ double-colons (::), and declare C<Net_Config> to be of that type:
         T_PTROBJ_SPECIAL
                 if (sv_derived_from($arg, \"${(my $ntt=$ntype)=~s/_/::/g;\$ntt}\")) {
                         IV tmp = SvIV((SV*)SvRV($arg));
-                $var = ($type) tmp;
+                        $var = INT2PTR($type, tmp);
                 }
                 else
                         croak(\"$var is not of type ${(my $ntt=$ntype)=~s/_/::/g;\$ntt}\")
@@ -1847,6 +1847,11 @@ The INPUT and OUTPUT sections substitute underscores for double-colons
 on the fly, giving the desired effect.  This example demonstrates some
 of the power and versatility of the typemap facility.
 
+The INT2PTR macro (defined in perl.h) casts an integer to a pointer, 
+of a given type, taking care of the possible different size of integers
+and pointers.  There are also PTR2IV, PTR2UV, PTR2NV macros,
+to map the other way, which may be useful in OUTPUT sections.
+
 =head2 Safely Storing Static Data in XS
 
 Starting with Perl 5.8, a macro framework has been defined to allow