That's because mmap() predates multithreading (at least as a usable production approach rather than a lab experiment). It's best for IPC, not sharing between th

That's because mmap() predates multithreading (at least as a usable production approach rather than a lab experiment). It's best for IPC, not sharing between threads. I forget sometimes that the young'ns never grew up in a world without threads, and often never learned how unix really works.