Principles for syscall wrappers, again

[Rich Felker]

On Tue, May 26, 2015 at 05:48:41PM +0200, Andreas Schwab wrote:
> Rich Felker <dalias@libc.org> writes:
> 
> > I think this is gratuitous NIH'ing and a disservice to applications.
> > Code which wants to use the futex API is already doing so via
> > syscall() with the existing API, and is most easily updated to use
> > futex().
> 
> futex is much like socketcall: a multiplexer between more or less
> loosely related functions.  See nptl/DESIGN*.txt for how the API really
> should look like.

That may be how it's used internally in glibc, but not elsewhere. And
that API lacks important things like the private/shared distinction
and features beyond basic wait/wake..

Rich