Re: pthread library related

To: tech-userlevel%netbsd.org@localhost
Subject: Re: pthread library related
From: Joerg Sonnenberger <joerg%bec.de@localhost>
Date: Tue, 31 May 2016 13:26:14 +0200

On Mon, May 30, 2016 at 02:19:26PM -0700, Charles Cui wrote:
> good to know atomic_inc_uint_nv is implemented using cas.

No, atomic_inc is *not* necessarily implemented using CAS. There are a
couple of different ways to do it ranging from implicit serialisation on
UP-only systems over CAS/LL-SC loops to native locked inc instructions.
For the application program, it doesn't generally matter which it is.

Joerg

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References:
- Re: pthread library related
  - From: Charles Cui
- Re: pthread library related
  - From: Christos Zoulas
- Re: pthread library related
  - From: Charles Cui

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