Re: Internal libc lock interface

[Roland McGrath]

I think libc-lock.h's comments are pretty self-explanatory.  It is the
interface for locks internal to the "generic" parts of libc.  

In a full-fledged integrated pthreads implementation,
linuxthreads/sysdeps/pthread/bits/libc-lock.h is probably about right.

Note that the low-level hurd-specific code does not use that interface for
its locks.  Locking at that level has to be savvy about the signal thread
and critical sections and so forth.