Re: Wait-free Hazard Pointers Using Std Atomics

On 5/26/2025 2:58 PM, jseigh wrote:

and asymmetric memory barriers of course.
 https://threadnought.wordpress.com/2025/05/26/wait-free-hazard-pointers- using-std-atomics/
 Looks like it runs faster without the conditional branch.
 Not sure it's a new idea.  The only wait-free version of hazard pointers
I've seen so far involves a storage to storage move instruction which
might not be available on all platforms.

Interesting, thanks Joe! Fwiw, I think, something like FlushProcessWriteBuffers() should be in a new C++ std? Perhaps, allow a system to use DWCAS without resorting to not lock-free wrt the checks? Damn it. ;^o Ouch.
https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-flushprocesswritebuffers
Sometimes I think that function was specifically designed for exotic RCU, ect...