> On 01/13/2023 1:06 PM PST Hal Murray <halmur...@sonic.net> wrote: > > > If we make any changes to SHM, we should switch to a setup where the memory is > read only. The idea is to allow multiple readers. > > The trick to implementing that is to have 2 counters. > X and Y are initialized to the same value. > The writer bumps X, updates the data, then bumps Y. > The reader grabs Y, grabs the data, then grabs X. > If X and Y are the same the data is valid. If not, try again.
I've heard you mention this before, and I specced it by calling them bookends instead and sticking them at opposite ends of a 4KiB page-sized struct. _______________________________________________ devel mailing list devel@ntpsec.org https://lists.ntpsec.org/mailman/listinfo/devel
