[Oorexx-bugs] [ oorexx-Bugs-1717166 ] Queue Push fails when larger than 7128

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Bugs item #1717166, was opened at 2007-05-11 08:36
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Category: APIs
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Rick McGuire (bigrixx)
Assigned to: Mark Miesfeld (miesfeld)
Summary: Queue Push fails when larger than 7128

Initial Comment:
This appears to be related to the Vista changes, but I'm not sure what the actual problem is.  Here's a simple program to recreated this:

/* The break point for this example is 7129
   If the do loop is 7128 it works ok
   if the do loop is 7129, the Push fails with:

 Open Object Rexx Interface has encountered a problem
 and need to close.

 AppName: rexxexe AppVer: 3.1.2.1  ModName:  rexxapi.dll
 ModVer: 3.1.2.1.  Offset:  00001fe4
*/

Do i = 2 to 7129
 a = a||'A'
end
say 'Length:'Length(a)
Push a
Pull b
say b

The queue elements are transmitted to the rxapi server using shared memory, and there's logic to extend the shared memory buffer when necessary.  However, it appears that something is miss firing in the buffer reallocation.  When the client attempts to access the newly allocated buffer after sending the extend method to the rxapi process, it appears to be getting the original buffer back again.  This causes a trap when it attempts to copy the queue data back into the buffer. 


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