From: Brian Candler <b.candler@...>
Date: 2009-09-14T17:52:23+09:00
Subject: Re: Global Mutex?

Abhinav Saxena wrote:
> I used something like this using "ln -s" system command. Used to work 
> great,
> so if you want a simple approach and implementation you can use it. One
> catch: if the process which has the lock dies in between, you will have 
> to
> ensure locks are properly released.

Both versions I proposed don't suffer from this problem.

- if you flock a file, the lock is dropped when the process owning it 
dies

- if you synchronize using 'yield' within a DRb server, then if the 
client dies the TCP connection will be dropped and the block will 
terminate.

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