suggestion for process shared mutex

From: Ittay Freiman (ittay_at_qlusters.com)
Date: 07/30/03 

Date: 29 Jul 2003 23:45:26 -0700

Hi,

I'm looking for a way of having a mutex shared by two independant
processes (not forks of one). I've tried using IPC semaphores, but
they cause me a lot of headache, especially managing a reference count
on them, so when the last process goes down they are destroyed (why
did they provide such a feature for shared memory, but not
semaphores??).

I can also use mmap-ed files, but then I need to create those files
somewhere and synchronize to them, which will be costly.

I'm already using shared memory. Is there a reference to someplace
that can explain how to implement a mutex in the shared memory?

Any other suggestions?

Thank you for your help,
Ittay

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