Thanks Pavel this looks quite fast :).
Do you have a scenario in mind that could take advantage of this?


On Mon, Feb 12, 2018 at 10:33 AM, Pavel Krivanek
<> wrote:
> Hi,
> among other less interesting things, I spent some time on existing
> PosixSharedMemory project. It is a UFFI binding for the LibC methods
> that provide support for the memory allocation between several
> separate processes. I significantly improved the performance by
> implementing the block access. Writing of 10MB byte array takes about
> 1 millisecond, reading of it from other image took me about 4
> milliseconds. While serialization with Fuel is very fast, it opens
> interesting possibilities.
> To have a shared memory without synchronization tools is not very
> useful so I wrote a basic UFFI interface for the POSIX named
> semaphores. They are quite easy to use and work nicely with Pharo. The
> VM can all wait on the semaphore or it can check the status of it
> periodically in an image thread. It has two small disadvantages. It
> requires to dynamically link the next library (pthread) and they must
> be cleaned manually. I plan to look at System V alternative in future.
> Now we should write a nice framework for inter-image communication on
> top of it or/and adopt Seamless for it ;-)
> Cheers,
> -- Pavel

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