normal 8ff35b816a ext/socket/init.c: use SOCK_NONBLOCK if available
This saves a system call by allowing us to use SOCK_NONBLOCK in
Linux when accept4 is available.

Note: I do not agree accept_nonblock should always make accepted
sockets non-blocking, and will propose a future API to allow
controlling whether accepted sockets are non-blocking or not
regardless of how they were created.

* ext/socket/init.c (cloexec_accept): support nonblock flag and
  use SOCK_NONBLOCK if possible
* ext/socket/init.c (rsock_s_accept_nonblock): update cloexec_accept call
* ext/socket/init.c (accept_blocking): ditto for blocking
* test/socket/test_nonblock.rb: check nonblock? on accepted socket
  [Feature #11138]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50518 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2015-05-17 05:56:07 +00:00
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