@ZeroIntensity
I think you are right. Can you help me convert it into a draft? I'm mobile now.

This PR is trying to do too many things. I don't really see the need for the switch to a new macro, but if we do end up doing that, it should be in another PR. Please revert that and keep this focused on the one new macro.

@rruuaanng, please take Peter's words into account for future contributions. That piece of advice is also spelled out in the devguide.

I'll land this in a day or two.

This PR is trying to do too many things. I don't really see the need for the switch to a new macro, but if we do end up doing that, it should be in another PR. Please revert that and keep this focused on the one new macro.

@rruuaanng, please take Peter's words into account for future contributions. That piece of advice is also spelled out in the devguide.

Yes, So I've completed his suggestion. I almost forgot it in the process :)

Hold on, I need to add a document for fcntl, and I found the addition log in the existing documentation. And I confirmed that there is no corresponding document for my other PR