glibc pthreads and optimized locks

[dumblob <dumblob@gmail.com>]

Dear glibc experts,

Does anybody know whether glibc pthreads implement the fast lock
algorithms as https://github.com/AlexeyAB/object_threadsafe does?

A detailed description of these algorithms is in
https://www.codeproject.com/Articles/1183423/We-Make-a-std-shared-mutex-10-Times-Faster
and some more optimizations in
https://www.codeproject.com/Articles/1183446/Thread-safe-std-map-with-the-speed-of-lock-free-ma
. Btw. I'm aware these articles discuss C++, but the same principles
apply to locks in C.

I'm asking because pthreads are known to be rather slower in general
and if such optimized variants of locks are not implemented, I'll
propose implementing them in few specific apps which would benefit
from the optimizations (e.g. the main implementation of the V
language).

Thanks,

dumblob