start refactoring

models/proto/tcp/process.go

@@ -0,0 +1,38 @@
+// Copyright 2016 fatedier, fatedier@gmail.com
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcp
+
+import (
+	"io"
+	"sync"
+)
+
+// Join two io.ReadWriteCloser and do some operations.
+func Join(c1 io.ReadWriteCloser, c2 io.ReadWriteCloser) (inCount int64, outCount int64) {
+	var wait sync.WaitGroup
+	pipe := func(to io.ReadWriteCloser, from io.ReadWriteCloser, count *int64) {
+		defer to.Close()
+		defer from.Close()
+		defer wait.Done()
+
+		*count, _ = io.Copy(to, from)
+	}
+
+	wait.Add(2)
+	go pipe(c1, c2, &inCount)
+	go pipe(c2, c1, &outCount)
+	wait.Wait()
+	return
+}