net, runtime: integrated network poller for freebsd/amd64,386, openbsd/amd64,386 #5199
Description
If you want to use new integrated network pollers on BSD variants, please be aware of the issues on kqueue stuff. Edge-triggered notification mode: EV_CLEAR makes things simple but on some BSD platforms, the system call listen breaks capturing the state transitions, not sure the reason, may be a bug, may be not. A workaround would be separating registering events for stream listeners which call listen and others. Use of EV_RECEIPT: Unfortunately both of NetBSD and OpenBSD don't support it yet. It would be needed to implement similar stuff when we should support a capricious event that leaving and arriving frequently, or should support bulk registration.