Commit a1c042bfe9238949a02a1050b9b4d3a1d36f5091
2012-02-10T15:55:15
Infrastructure for using faster/fewer syscalls when creating sockets Linux provides some features that allow avoiding extra calls to fcntl when creating new nonblocking/close-on-exec sockets, so we can add wrapper functions to emulate those when they are not available. Additionally, even when we are emulating those functions, we can take a fast path that cuts our fcntl calls in half: we don't need to look up the previous value of a file's flags when we have just created it.