need for another mutex type/flag?

Poul-Henning Kamp phk at
Sun Jan 25 00:18:46 PST 2009

In message <497BA91D.805 at>, Julian Elischer writes:

>I would like to be able to add a flag to a mutex
>that tags it as a 'leaf' mutex. As a result it would be illegal
>to take any other mutex while holding a leaf mutex.

I second that, even if the flag is purely documentary, it is a
good idea.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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