[Win32utils-devel] Fw: mmap 0.2.0 writing value from a child process

[Daniel Berger]

I thought I would forward this to see if anyone has any suggestions (other than, "You shouldn't use this code in conjunction with fork").

Thanks,

Dan

----- Forwarded Message ----
From: "Park, Chong SuhX" <chong.suhx.park at intel.com>
To: Daniel Berger <djberg96 at yahoo.com>
Sent: Monday, October 16, 2006 3:59:55 PM
Subject: mmap 0.2.0 writing value from a child process




 
 


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Hi Dan,
 

  
 

First of all, I
sincerely appreciate your great contribution. Mmap 0.2.0 is critically
important piece of software for my project and would like to share with an
issue I am found today.  
 

  
 

I think it might
be a bug. Try following code and see if it is working. And then, remove comment
#  mmap.bar = 'My World' and run it again. You may find something interesting
 

  
 

pid1 = fork do
 

  
 

    mmap =
MMap.new(:name => 'alpha', :size => 2000)
 

    
 

    mmap.foo =
'Hello'
 

    mmap.bar =
'Your World'
 

  
 

    sleep 5
 

    mmap.close
 

  
 

end
 

  
 

sleep 1
 

  
 

pid2 = fork do
 

  
 

    mmap =
MMap.open('alpha')
 

  
 

  #  mmap.bar =
'My World'
 

  
 

    p mmap.foo
 

    p mmap.bar
 

  
 

    mmap.close
 

    
 

end
 







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