Re:BeOS: The Alternate Universe's Mac OS X
by asveikau on Saturday January 11, 2020 @04:17PM
(#22022386)
> Since inter-process communication in Amiga OS was based on message passing with memory-sharing, it was impossible to add MMU-based memory protection later.
Why can't you do shared memory message passing with MMU protection? There is no reason an application in a modern memory protected OS can't voluntarily share pages when the use case is appropriate. This happens today. You can mmap the same pages, you can use posix shm, X has the shm extension...
Why can't you do shared memory message passing with MMU protection? There is no reason an application in a modern memory protected OS can't voluntarily share pages when the use case is appropriate. This happens today. You can mmap the same pages, you can use posix shm, X has the shm extension...