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Ramine

5/11/2016 4:30:00 PM

Hello.....

Look at this scalable Asymmetric rw_mutex from Dmitry Vyukov:

https://groups.google.c...!topic/lock-free/Hv3GUlccYTc


If you have noticed he is using a compiler "_ReadWriteBarrier()",
but this doesn't emmit a fence on x86, it is just a compiler barrier,
but i am wondering how can he do it this way because loads
of the reader critical section can be reordered on x86 with the
following store:

reader_inside[current_thread_index] = true;


So i think it is a bug, can you please shade some light on this ?



Thank you,
Amine Moulay Ramdane.