Subj : Re: SEM_UNDO substitute on windows
To   : comp.programming.threads
From : deepesh.g
Date : Mon May 23 2005 07:39 am

Thanks for your response.
I am using semaphores to check if an application is already running
(application tries to acquire lock on a semaphore and if times out, it
must have been acquired by another instance of the application). In
case if this application exits (May be user exits which is very good
and may be because windows decides that it must be crashed now and
thats where the requirement for SEM_UNDO) the semaphore operations it
did must be undone so that another instance of application would be
able to acquire lock on this semaphore and go ahead with execution. I
would be happy to get any robust solution for this problem, but somehow
I imagined that using semaphores would be a good solution (until I
realize that SEM_UNDO is not supported on windows). Any input is
welcome.
Thanks again for your help.
Deepesh

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