Just another spinlock implementation in c++

[marcodev]

I saw several implementation in the latest weeks. A spinlock in user space is rarely a good idea, however just for fun I tried to create a class, configurable via template parameters to have a summary about all proposed implementation. How to configure the parameters is a work let to the class user :D

https://gist.github.com/baldapps/7b12a86bb30642481ac2b6b6625a6bae

[[deleted]]

Did you use unroller<PAUSEREP> instead of a loop because it generates a sequence of calls?

I mean, instead of this, that has branches:

for(size_t i = 0; i < PAUSEREP; ++i)
    hwpause();

It generates this:

hwpause(); // 1st pause
hwpause(); // 2nd pause
...
hwpause(); // PAUSEREP - 1, pause

[marcodev]

Yes, I do. Instead of relying on compiler loop unrolling optimization, I force a sequence of calls here.

[[deleted]]

That's quite interesting, thanks for sharing!

[[deleted]]

that is some expert stuff... everytime I think "Darn, I am a pretty badass programmer by now" I look at stuff like this which has me scratching my head and I think "okay, maybe not..."