Having trying myself to implement a semaphore-based locking mechanism for IPC SysV shared memory, I'd recommend IPC::ShareLite for general purposes. It comes with a powerful locking mechanism, which is incredibly similar to flock() !
Apache::SharedMem also depends on this module.

In reply to Re: Re: Re: Sharing data structures among http processes? by pope
in thread Sharing data structures among http processes? by sutch

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