net: On Solaris use Darwin keepalive code.

From-SVN: r204819

libgo/Makefile.am

@@ -752,7 +752,7 @@ if LIBGO_IS_DARWIN
 go_net_tcpsockopt_file = go/net/tcpsockopt_darwin.go
 else
 if LIBGO_IS_SOLARIS
-go_net_tcpsockopt_file = go/net/tcpsockopt_solaris.go
+go_net_tcpsockopt_file = go/net/tcpsockopt_darwin.go
 else
 go_net_tcpsockopt_file =  go/net/tcpsockopt_unix.go
 endif

libgo/Makefile.in

@@ -996,7 +996,7 @@ go_mime_files = \
 @LIBGO_IS_LINUX_FALSE@go_net_cloexec_file = go/net/sys_cloexec.go
 @LIBGO_IS_LINUX_TRUE@go_net_cloexec_file = go/net/sock_cloexec.go
 @LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_OPENBSD_FALSE@@LIBGO_IS_SOLARIS_FALSE@go_net_tcpsockopt_file = go/net/tcpsockopt_unix.go
-@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_OPENBSD_FALSE@@LIBGO_IS_SOLARIS_TRUE@go_net_tcpsockopt_file = go/net/tcpsockopt_solaris.go
+@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_OPENBSD_FALSE@@LIBGO_IS_SOLARIS_TRUE@go_net_tcpsockopt_file = go/net/tcpsockopt_darwin.go
 @LIBGO_IS_DARWIN_TRUE@@LIBGO_IS_OPENBSD_FALSE@go_net_tcpsockopt_file = go/net/tcpsockopt_darwin.go
 @LIBGO_IS_OPENBSD_TRUE@go_net_tcpsockopt_file = go/net/tcpsockopt_openbsd.go
 go_net_files = \

libgo/go/net/tcpsockopt_solaris.go

-// Copyright 2009 The Go Authors.  All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package net
-
-import (
-	"os"
-	"syscall"
-	"time"
-)
-
-// Set keep alive period.
-func setKeepAlivePeriod(fd *netFD, d time.Duration) error {
-	if err := fd.incref(); err != nil {
-		return err
-	}
-	defer fd.decref()
-
-	// The kernel expects milliseconds so round to next highest millisecond.
-	d += (time.Millisecond - time.Nanosecond)
-	msecs := int(d.Nanoseconds() / time.Millisecond)
-
-	return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE_THRESHOLD, msecs))
-}