[Win32utils-devel] Need some help with latest win32-mmap

Daniel Berger Daniel.Berger at qwest.com
Mon Oct 9 16:47:44 EDT 2006

Heesob Park wrote:
> Hi,
> 2006/10/7, Daniel Berger <djberg96 at gmail.com <mailto:djberg96 at gmail.com>>:
>     Hi all,
>     I've got the latest win32-mmap code checked into CVS.  Unfortunately, it
>     seems that I'm not able to open an existing mapping and retrieve set
>     data.  Below is a simple example that seems like it ought to work but
>     doesn't.  Any ideas?
>     # map1.rb
>     require 'win32/mmap'
>     include Win32
>     mmap = MMap.new(:name => 'alpha', :size => 20)
>     p mmap.address
>     mmap.test = "hello"
>     mmap.close
>     # map2.rb
>     # mmap = MMap.open('alpha') # Boom!
>     mmap = MMap.new(:name => 'alpha', :size => 20) # Ok so far...
>     p mmap.test # Boom!
>     mmap.close
>     I tried using MMap.open and MMap.new.  Neither seems to work as
>     expected.  What am I doing wrong?
> That's strange.
> I downloaded and tested the win32-mmap and your map1.rb and map2.rb
> It runs ok and seems to work as expected.
> Regards,
> Park Heesob

Really?  When you run map2.rb you see "hello"?

When I run map2.rb I get the same address.  But when I run map2.rb I get an 
error at mmap.rb, line 270: 'load - marshal data too short'.  It seems that I'm 
getting an empty buffer from the memcpy, but I don't understand why.

I just tried this at work, too - same result.



This communication is the property of Qwest and may contain confidential or
privileged information. Unauthorized use of this communication is strictly 
prohibited and may be unlawful.  If you have received this communication 
in error, please immediately notify the sender by reply e-mail and destroy 
all copies of the communication and any attachments.

More information about the win32utils-devel mailing list