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Internal libc lock interface

From: Igor Khavkine
Subject: Internal libc lock interface
Date: Thu, 21 Jun 2001 01:56:28 -0400
User-agent: Mutt/1.3.18i

I found a header in glibc that defines a generic lock interface.
The file is sysdeps/generic/bits/libc-lock.h. There is a Mach
specific version of it in sysdeps/mach/bits. It is implemented
on top of cthread locks.

Was intended to be a high level or low level lock inteface? 
So should I try to reimplement it on top of spin_lock's or
pthread_mutex's? In the former case, how do I deal with
rwlocks (what are these btw?) or recursive locks. In the latter
I have to come up with a lower level generic interface to locks.



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