There's a library [1] that implements message passing and locking for communiction between VMs in a similar way and is used by the awesome looking glass project

There's a library [1] that implements message passing and locking for communiction between VMs in a similar way and is used by the awesome looking glass project to send the accelerated GPU video stream from a vm to the host or a different vm. [1] https://github.com/gnif/LGMP https://github.com/gnif/LGMP