>while that's harder to do between processes and you have to resort to copying data in the queue instead.
I could be wrong - I've never done it, but I understood that you can even store POSIX mutexes and condition vars in shared mem
so that 2 processes (or more?) can process data without copying, so long as they use the both use the same locks stored in the shared memory.
gpderetta
Yes, when the mutex or condvar is inited with attribute PTHREAD_PROCESS_SHARED.
I could be wrong - I've never done it, but I understood that you can even store POSIX mutexes and condition vars in shared mem so that 2 processes (or more?) can process data without copying, so long as they use the both use the same locks stored in the shared memory.