Messages in this thread | | | Subject | Re: light weight user level semaphores | Date | Thu, 19 Apr 2001 20:35:59 +0100 (BST) | From | Alan Cox <> |
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> I fail to see how this works across processes. How can you generate a > file descriptor for this pipe in a second process which simply shares > some memory with the first one? The first process is passive: no file > descriptor passing must be necessary.
mknod foo p. Or use sockets (although AF_UNIX sockets are higher latency) Thats why I suggested using flock - its name based. Whether you mkstemp() stuff and pass it around isnt something I care about
Files give you permissions for free too
> Note that semaphores need not always be shared between processes. > This is a property the user has to choose. So the implementation can > be easier in the normal intra-process case.
So you have unix file permissions on them ?
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