[PATCH] fix startup race in shared.cc

[Christopher Faylor]

On Tue, May 03, 2005 at 05:11:44PM -0700, Usman Muzaffar wrote:
>Still seeing incorrect "version mismatch" messages for processes
>starting simultaneously on dual-processor systems; I believe this
>patch to the recent locking work in shared.cc fixes the "user shared
>memory version" errors I'm seeing.

I don't believe that your patch goes far enough to ensure the
consistency of the shared memory before checking things.  I've checked
in a change which should ensure that the area has been initialized
before it is used.

Thanks for the patch and for pointing to the location of the problem.

cgf