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Re: Equivalent of FreeBSD kernel semaphore?
manu%netbsd.org@localhost (Emmanuel Dreyfus) wrote:
> Christos Zoulas <christos%astron.com@localhost> wrote:
> > Why don't you implement them the same way like FreeBSD did, using a
> > mutex and a condition variable?
> I am not sure I correctly understand what you mean: is it that we do not
> have an equivalent of NetBSD's struct sema, and that it would need to be
> implemented using mutex and condvar?
When new synchronisation primitives were designed, it was a deliberate
decision to not add kernel semaphore. We have modern equivalents, which
achieve the same (well, more) and are more robust.
If you need a wrapper for compatibility, please keep it in your code.
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