From 7a82927f639484d73cb828edca1df9eb2ef1e4c8 Mon Sep 17 00:00:00 2001
From: Aaron Jacobs <jacobsa@google.com>
Date: Fri, 1 May 2015 10:57:49 +1000
Subject: [PATCH] commonOp.respond

---
 fuseops/common_op.go | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/fuseops/common_op.go b/fuseops/common_op.go
index 640a180..c93e46d 100644
--- a/fuseops/common_op.go
+++ b/fuseops/common_op.go
@@ -15,6 +15,7 @@
 package fuseops
 
 import (
+	"reflect"
 	"sync"
 
 	"github.com/jacobsa/bazilfuse"
@@ -71,3 +72,24 @@ func (o *commonOp) respondErr(err error) {
 
 	o.r.RespondError(err)
 }
+
+// Respond with the supplied response struct, which must be accepted by a
+// method called Respond on o.r.
+//
+// Special case: nil means o.r.Respond accepts no parameters.
+func (o *commonOp) respond(resp interface{}) {
+	// Find the Respond method.
+	v := reflect.ValueOf(o.r)
+	respond := v.MethodByName("Respond")
+
+	// Special case: handle successful ops with no response struct.
+	if resp == nil {
+		o.Logf("-> (%s) OK", o.opType)
+		respond.Call([]reflect.Value{})
+		return
+	}
+
+	// Otherwise, pass along the response struct.
+	o.Logf("-> %v", resp)
+	respond.Call([]reflect.Value{reflect.ValueOf(resp)})
+}