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Chris_Webster [...] bmc.com
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Subject: MMF::CreateFileMapping Fails with Perl 64 bit
Date: Wed, 9 Nov 2016 00:46:07 +0000
To: "bug-Win32-MMF@rt.cpan.org" <bug-Win32-MMF@rt.cpan.org>
From: "Webster, Chris" <Chris_Webster@bmc.com>

While running Strawberry Perl 64-bit the CreateFileMapping fails with Invalid File Handle.

 

The initial error is:

Use of uninitialized value in subroutine entry at C:/home/dev/perl/5240/perl/perl/site/lib/Win32/MMF.pm line 149.

 

Setting debug on got this message:

CreateFileMapping: Error creating file mapping

 

Changing MMF.pm gave the invalid file handle message:

        $ns = CreateFileMapping($swap, $size, $namespace)

           or croak Win32::FormatMessage( Win32::GetLastError());

 

Initially changed MMF.pm to pass a handle of -1 instead of 0 and it worked. 

 

Changing line 548 of MMF.xs from:

               HANDLE hFile = (HANDLE)0xFFFFFFFF;

To:

               HANDLE hFile = INVALID_HANDLE_VALUE;

Resolved the problem.  I did not run a 32-bit build (this was my first build of any part of perl).

 

Running on Win7 64-bit.

 

c:\home\dev\scc\1211\scc\build\make>perl -V

Summary of my perl5 (revision 5 version 24 subversion 0) configuration:

 

  Platform:

    osname=MSWin32, osvers=6.3, archname=MSWin32-x64-multi-thread

    uname='Win32 strawberry-perl 5.24.0.1 #1 Tue May 10 21:30:49 2016 x64'

    config_args='undef'

    hint=recommended, useposix=true, d_sigaction=undef

    useithreads=define, usemultiplicity=define

    use64bitint=define, use64bitall=undef, uselongdouble=undef

    usemymalloc=n, bincompat5005=undef

 

Let me know if you need more information.

 

Thanks,

…chris.



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