src: simplify handlewrap state tracking logic

This also updates the tests to expect that a closed handle has no
reference count.

PR-URL: https://github.com/nodejs/node/pull/6395
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

2 files changed, 6 insertions, 10 deletions

diff --git a/src/handle_wrap.cc b/src/handle_wrap.cc
index 85c8d9e921..b82449989d 100644
--- a/src/handle_wrap.cc
+++ b/src/handle_wrap.cc
@@ -35,10 +35,7 @@ void HandleWrap::Unref(const FunctionCallbackInfo<Value>& args) {
 
 void HandleWrap::Unrefed(const FunctionCallbackInfo<Value>& args) {
   HandleWrap* wrap = Unwrap<HandleWrap>(args.Holder());
-  // XXX(bnoordhuis) It's debatable whether a nullptr wrap should count
-  // as having a reference count but it's compatible with the logic that
-  // it replaces.
-  args.GetReturnValue().Set(wrap == nullptr || !HasRef(wrap));
+  args.GetReturnValue().Set(!HasRef(wrap));
 }
 
 
@@ -51,6 +48,9 @@ void HandleWrap::Close(const FunctionCallbackInfo<Value>& args) {
   if (!IsAlive(wrap))
     return;
 
+  if (wrap->state_ != kInitialized)
+    return;
+
   CHECK_EQ(false, wrap->persistent().IsEmpty());
   uv_close(wrap->handle__, OnClose);
   wrap->state_ = kClosing;
diff --git a/src/handle_wrap.h b/src/handle_wrap.h
index fe3c5a8d9d..ef37cf9e34 100644
--- a/src/handle_wrap.h
+++ b/src/handle_wrap.h
@@ -38,15 +38,11 @@ class HandleWrap : public AsyncWrap {
   static void Unrefed(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   static inline bool IsAlive(const HandleWrap* wrap) {
-    // XXX(bnoordhuis) It's debatable whether only kInitialized should
-    // count as alive but it's compatible with the check that it replaces.
-    return wrap != nullptr && wrap->state_ == kInitialized;
+    return wrap != nullptr && wrap->state_ != kClosed;
   }
 
   static inline bool HasRef(const HandleWrap* wrap) {
-    return wrap != nullptr &&
-           wrap->state_ != kClosed &&
-           uv_has_ref(wrap->GetHandle());
+    return IsAlive(wrap) && uv_has_ref(wrap->GetHandle());
   }
 
   inline uv_handle_t* GetHandle() const { return handle__; }