mmap information?

Hi all

I've been trying to piece together information for a project I'm planning, and have read a little about mmap. Is there anywhere I can find out more information about it?

Also, is it available on other platforms (Win, FreeBSD, Mac, etc)?

Thanks.

A lot of unixes are have System V IPC. Parts of that are the shmget, shmat, shmctl, etc. calls that create shared memory segments. Very few unix flavors have mmap.

Windows does not play the IPC game the same way. It started off using atoms, mailslots, COM objects, then moved more in the direction of threads and message pumps rather than interprocess communication as the rest of the world does it.

In POSIX threads (pthreads) there is a lot of shared memory support, and pthreads exists in most flavors of unix. It is on a per thread basis, not across processes.

If you want portable IPC consider: pipes or message queues. Pipes & named pipes work in most environments. Of course Windows uses non-standard api's to work with them.