<atomic.h> and single-byte CAS

Joseph Myers joseph@codesourcery.com
Thu Jul 25 15:39:00 GMT 2019


On Mon, 8 Jul 2019, Florian Weimer wrote:

> Our <atomic.h> does not support single-byte CAS.  Does anyone know why?

The obvious reason would be that some architectures don't actually support 
it directly, so it has to be implemented there based on word-size CAS, and 
the glibc uses of atomics can readily avoid any need for single-byte CAS.

-- 
Joseph S. Myers
joseph@codesourcery.com



More information about the Libc-alpha mailing list