Win32 System calls from multiple threads - "The Data area passed to a system call is too small"


This one is easy to repeat.  Go into the IDE, LW6 (or LW5.1 it worked
there too) and run:

(loop for i from 1 to 10 do
      (mp:process-run-function
       (format nil "Test Thing ~A" i)
       nil
       (lambda () (loop for j from 1 do
(system:get-user-profile-directory)))))

To be honest, it repeats for me with 2 (I put in 10 for good measure). 
Any collision causes the error.

If I serialize the system calls, of course, the problem goes away
(irrespective of thread count).

I'm asking here if there is a workaround for this, some initial step or
per-thread setup I can do.  I was hesitant to write this up as a bug
until I understand it better - this may be an inherent attribute of
certain Windows system calls (worst case, perhaps, have the runtime try
to serialize them?)


My platform:
LW6.0 32-bit, on Vista 64 on a Quad-core Intel

Re: Win32 System calls from multiple threads - "The Data area passed to a system call is too small"

Matt Lamari <matt.lamari@gmail.com> writes:

> My platform:
> LW6.0 32-bit, on Vista 64 on a Quad-core Intel

In case this sheds any light on the matter, I can run the code sample without any trouble on:

LW6.0 32-bit  WinXP on dual core

BC

Re: Win32 System calls from multiple threads - "The Data area passed to a system call is too small"

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