Release all references

common/io/reader.go

@@ -3,6 +3,7 @@ package io // import "github.com/v2ray/v2ray-core/common/io"
 import (
 	"io"
 
+	"github.com/v2ray/v2ray-core/common"
 	"github.com/v2ray/v2ray-core/common/alloc"
 )
 
@@ -23,6 +24,11 @@ type Reader interface {
 	Read() (*alloc.Buffer, error)
 }
 
+type ReleasableReader interface {
+	Reader
+	common.Releasable
+}
+
 // AdaptiveReader is a Reader that adjusts its reading speed automatically.
 type AdaptiveReader struct {
 	reader   io.Reader
@@ -57,3 +63,7 @@ func (this *AdaptiveReader) Read() (*alloc.Buffer, error) {
 	}
 	return buffer, nil
 }
+
+func (this *AdaptiveReader) Release() {
+	this.reader = nil
+}