socket (bsock_recvmsg_internal): avoid arg parsing

* ext/socket/ancdata.c (bsock_recvmsg_internal): avoid arg parsing
  (rsock_bsock_recvmsg): adjust for above change
  (rsock_bsock_recvmsg_nonblock): ditto
  [ruby-core:71439] [Feature #11339]
* ext/socket/rubysocket.h: adjust prototypes for above
* ext/socket/basicsocket.c (rsock_init_basicsocket):
  adjust private methods
* ext/socket/lib/socket.rb (BasicSocket#recvmsg): wrapper method
  (BasicSocket#recvmsg_nonblock): ditto

target 0: a (ruby 2.3.0dev (2015-11-12 trunk 52550) [x86_64-linux])
target 1: b (ruby 2.3.0dev (2015-11-12 avoid-kwarg-capi 52550) [x86_64-linux]

-----------------------------------------------------------
recvmsg_nonblock

require 'socket'
nr = 1_000_000
i = 0
msg = '.'
buf = '.'
begin
  r, w = UNIXSocket.pair(:SEQPACKET)
  while i < nr
    i += 1
    w.sendmsg(msg)
    r.recvmsg_nonblock(1, exception: false)
  end
ensure
  r.close
  w.close
end

-----------------------------------------------------------
raw data:

[["recvmsg_nonblock",
  [[3.721687912940979,
    3.6072621569037437,
    3.580637402832508,
    3.614185404032469,
    3.6029579415917397],
   [2.4694008752703667,
    2.4908322244882584,
    2.5051278844475746,
    2.5037173740565777,
    2.548359278589487]]]]

Elapsed time: 30.646087052 (sec)
-----------------------------------------------------------
benchmark results:
minimum results in each 5 measurements.
Execution time (sec)
name             a       b
recvmsg_nonblock   3.581   2.469

Speedup ratio: compare with the result of `a' (greater is better)
name             b
recvmsg_nonblock   1.450

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52602 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 2 deletions

diff --git a/ext/socket/rubysocket.h b/ext/socket/rubysocket.h
index d39de0ab1a..652876cc89 100644
--- a/ext/socket/rubysocket.h
+++ b/ext/socket/rubysocket.h
@@ -369,8 +369,10 @@ VALUE rsock_bsock_sendmsg_nonblock(int argc, VALUE *argv, VALUE sock);
 #endif
 
 #if defined(HAVE_RECVMSG)
-VALUE rsock_bsock_recvmsg(int argc, VALUE *argv, VALUE sock);
-VALUE rsock_bsock_recvmsg_nonblock(int argc, VALUE *argv, VALUE sock);
+VALUE rsock_bsock_recvmsg(VALUE sock, VALUE dlen, VALUE clen, VALUE flags,
+			  VALUE scm_rights);
+VALUE rsock_bsock_recvmsg_nonblock(VALUE sock, VALUE dlen, VALUE clen,
+				   VALUE flags, VALUE scm_rights, VALUE ex);
 ssize_t rsock_recvmsg(int socket, struct msghdr *message, int flags);
 #else
 #define rsock_bsock_recvmsg rb_f_notimplement