Messages in this thread | | | Date | Mon, 25 Feb 2002 09:06:15 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [PATCH] Lightweight userspace semaphores... |
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On Mon, 25 Feb 2002, Alan Cox wrote: > > > fd = open("/dev/shm/sem...."); > > > > Hmm.. Yes. Except I would allow a NULL backing store name for the > > normal(?) case of just wanting private anonymous memory. > > unlink()
Sure, but that, together with making up a unique temporary name etc just adds extra overhead for no actual gain.
> > At the same time, I have to admit that I like the notion that Rusty had of > > libraries being able to just put their semaphores anywhere (on the stack > > etc), as it does work for many architectures. Ugh. > > _alloca > mmap > > Still fits on the stack 8)
.. but is slow as hell.
Linus
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