Re: MUTEX Objects

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#14436

From: Leo Havm�ller
Date: Thu, 14 Aug 2003 05:55

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"PaulMac" <machiave@i-stat.com> wrote in message
news:3f3a81c8@newsgroups.borland.com...
> In using MUTEX objects, I came across something unexpected.  Given a
Windows
> GUI app and a Service app, if the same named MUTEX is accessed, both
> applications can acquire it when the other has already done so.  However,
if
> both applications are service apps or both are GUI apps, then the proper
> synchronization occurs.
>
> It has been my understanding that MUTEXes, being kernel objects, are
> "global" to a system.  So, why am I seeing this behavior?

The GUI app lives in a windows station whereas the service does not.
You need to add "Global\" to the mutex name. See "terminal services" under:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createmutex.asp

Leo Havm�ller.

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From: "Leo Havm�ller" <leh@-nospam-rtx.dk>
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Subject: Re: MUTEX Objects
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