rename UniquePersistent to Global

BUG=

Review URL: https://codereview.chromium.org/980173003

Cr-Commit-Position: refs/heads/master@{#27011}

include/v8.h

@@ -115,7 +115,8 @@ template<class T> class NonCopyablePersistentTraits;
 template<class T> class PersistentBase;
 template<class T,
          class M = NonCopyablePersistentTraits<T> > class Persistent;
-template<class T> class UniquePersistent;
+template <class T>
+class Global;
 template<class K, class V, class T> class PersistentValueMap;
 template <class K, class V, class T>
 class PersistentValueMapBase;
@@ -656,7 +657,8 @@ template <class T> class PersistentBase {
   template<class F> friend class Handle;
   template<class F> friend class Local;
   template<class F1, class F2> friend class Persistent;
-  template<class F> friend class UniquePersistent;
+  template <class F>
+  friend class Global;
   template<class F> friend class PersistentBase;
   template<class F> friend class ReturnValue;
   template <class F1, class F2, class F3>
@@ -812,46 +814,45 @@ template <class T, class M> class Persistent : public PersistentBase<T> {
  *
  * Note: Persistent class hierarchy is subject to future changes.
  */
-template<class T>
-class UniquePersistent : public PersistentBase<T> {
+template <class T>
+class Global : public PersistentBase<T> {
  public:
   /**
-   * A UniquePersistent with no storage cell.
+   * A Global with no storage cell.
    */
-  V8_INLINE UniquePersistent() : PersistentBase<T>(nullptr) {}
+  V8_INLINE Global() : PersistentBase<T>(nullptr) {}
   /**
-   * Construct a UniquePersistent from a Handle.
+   * Construct a Global from a Handle.
    * When the Handle is non-empty, a new storage cell is created
    * pointing to the same object, and no flags are set.
    */
   template <class S>
-  V8_INLINE UniquePersistent(Isolate* isolate, Handle<S> that)
+  V8_INLINE Global(Isolate* isolate, Handle<S> that)
       : PersistentBase<T>(PersistentBase<T>::New(isolate, *that)) {
     TYPE_CHECK(T, S);
   }
   /**
-   * Construct a UniquePersistent from a PersistentBase.
+   * Construct a Global from a PersistentBase.
    * When the Persistent is non-empty, a new storage cell is created
    * pointing to the same object, and no flags are set.
    */
   template <class S>
-  V8_INLINE UniquePersistent(Isolate* isolate, const PersistentBase<S>& that)
-    : PersistentBase<T>(PersistentBase<T>::New(isolate, that.val_)) {
+  V8_INLINE Global(Isolate* isolate, const PersistentBase<S>& that)
+      : PersistentBase<T>(PersistentBase<T>::New(isolate, that.val_)) {
     TYPE_CHECK(T, S);
   }
   /**
    * Move constructor.
    */
-  V8_INLINE UniquePersistent(UniquePersistent&& other)
-      : PersistentBase<T>(other.val_) {
+  V8_INLINE Global(Global&& other) : PersistentBase<T>(other.val_) {
     other.val_ = nullptr;
   }
-  V8_INLINE ~UniquePersistent() { this->Reset(); }
+  V8_INLINE ~Global() { this->Reset(); }
   /**
    * Move via assignment.
    */
   template <class S>
-  V8_INLINE UniquePersistent& operator=(UniquePersistent<S>&& rhs) {
+  V8_INLINE Global& operator=(Global<S>&& rhs) {
     TYPE_CHECK(T, S);
     if (this != &rhs) {
       this->Reset();
@@ -863,14 +864,19 @@ class UniquePersistent : public PersistentBase<T> {
   /**
    * Pass allows returning uniques from functions, etc.
    */
-  UniquePersistent Pass() { return static_cast<UniquePersistent&&>(*this); }
+  Global Pass() { return static_cast<Global&&>(*this); }
 
  private:
-  UniquePersistent(UniquePersistent&) = delete;
-  void operator=(UniquePersistent&) = delete;
+  Global(Global&) = delete;
+  void operator=(Global&) = delete;
 };
 
 
+// UniquePersistent is an alias for Global for historical reason.
+template <class T>
+using UniquePersistent = Global<T>;
+
+
  /**
  * A stack-allocated class that governs a number of local handles.
  * After a handle scope has been created, all local handles will be

test/cctest/test-api.cc

@@ -2127,7 +2127,7 @@ THREADED_TEST(InternalFieldsAlignedPointers) {
   void* huge = reinterpret_cast<void*>(~static_cast<uintptr_t>(1));
   CheckAlignedPointerInInternalField(obj, huge);
 
-  v8::UniquePersistent<v8::Object> persistent(isolate, obj);
+  v8::Global<v8::Object> persistent(isolate, obj);
   CHECK_EQ(1, Object::InternalFieldCount(persistent));
   CHECK_EQ(huge, Object::GetAlignedPointerFromInternalField(persistent, 0));
 }
@@ -3038,20 +3038,20 @@ THREADED_TEST(ResettingGlobalHandleToEmpty) {
 
 
 template <class T>
-static v8::UniquePersistent<T> PassUnique(v8::UniquePersistent<T> unique) {
+static v8::Global<T> PassUnique(v8::Global<T> unique) {
   return unique.Pass();
 }
 
 
 template <class T>
-static v8::UniquePersistent<T> ReturnUnique(v8::Isolate* isolate,
-                                            const v8::Persistent<T>& global) {
-  v8::UniquePersistent<String> unique(isolate, global);
+static v8::Global<T> ReturnUnique(v8::Isolate* isolate,
+                                  const v8::Persistent<T>& global) {
+  v8::Global<String> unique(isolate, global);
   return unique.Pass();
 }
 
 
-THREADED_TEST(UniquePersistent) {
+THREADED_TEST(Global) {
   v8::Isolate* isolate = CcTest::isolate();
   v8::Persistent<String> global;
   {
@@ -3062,11 +3062,11 @@ THREADED_TEST(UniquePersistent) {
       reinterpret_cast<v8::internal::Isolate*>(isolate)->global_handles();
   int initial_handle_count = global_handles->global_handles_count();
   {
-    v8::UniquePersistent<String> unique(isolate, global);
+    v8::Global<String> unique(isolate, global);
     CHECK_EQ(initial_handle_count + 1, global_handles->global_handles_count());
     // Test assignment via Pass
     {
-      v8::UniquePersistent<String> copy = unique.Pass();
+      v8::Global<String> copy = unique.Pass();
       CHECK(unique.IsEmpty());
       CHECK(copy == global);
       CHECK_EQ(initial_handle_count + 1,
@@ -3075,7 +3075,7 @@ THREADED_TEST(UniquePersistent) {
     }
     // Test ctor via Pass
     {
-      v8::UniquePersistent<String> copy(unique.Pass());
+      v8::Global<String> copy(unique.Pass());
       CHECK(unique.IsEmpty());
       CHECK(copy == global);
       CHECK_EQ(initial_handle_count + 1,
@@ -3084,7 +3084,7 @@ THREADED_TEST(UniquePersistent) {
     }
     // Test pass through function call
     {
-      v8::UniquePersistent<String> copy = PassUnique(unique.Pass());
+      v8::Global<String> copy = PassUnique(unique.Pass());
       CHECK(unique.IsEmpty());
       CHECK(copy == global);
       CHECK_EQ(initial_handle_count + 1,
@@ -3095,7 +3095,7 @@ THREADED_TEST(UniquePersistent) {
   }
   // Test pass from function call
   {
-    v8::UniquePersistent<String> unique = ReturnUnique(isolate, global);
+    v8::Global<String> unique = ReturnUnique(isolate, global);
     CHECK(unique == global);
     CHECK_EQ(initial_handle_count + 1, global_handles->global_handles_count());
   }
@@ -3129,8 +3129,7 @@ class WeakStdMapTraits : public v8::StdMapTraits<K, V> {
     return data.GetParameter()->key;
   }
   static void DisposeCallbackData(WeakCallbackDataType* data) { delete data; }
-  static void Dispose(v8::Isolate* isolate, v8::UniquePersistent<V> value,
-                      K key) {}
+  static void Dispose(v8::Isolate* isolate, v8::Global<V> value, K key) {}
 };
 
 
@@ -3156,7 +3155,7 @@ static void TestPersistentValueMap() {
       typename Map::PersistentValueReference ref = map.GetReference(7);
       CHECK(expected->Equals(ref.NewLocal(isolate)));
     }
-    v8::UniquePersistent<v8::Object> removed = map.Remove(7);
+    v8::Global<v8::Object> removed = map.Remove(7);
     CHECK_EQ(0, static_cast<int>(map.Size()));
     CHECK(expected == removed);
     removed = map.Remove(7);
@@ -3168,8 +3167,7 @@ static void TestPersistentValueMap() {
     {
       typename Map::PersistentValueReference ref;
       Local<v8::Object> expected2 = v8::Object::New(isolate);
-      removed = map.Set(8, v8::UniquePersistent<v8::Object>(isolate, expected2),
-                        &ref);
+      removed = map.Set(8, v8::Global<v8::Object>(isolate, expected2), &ref);
       CHECK_EQ(1, static_cast<int>(map.Size()));
       CHECK(expected == removed);
       CHECK(expected2->Equals(ref.NewLocal(isolate)));
@@ -3212,7 +3210,7 @@ TEST(PersistentValueVector) {
 
   Local<v8::Object> obj1 = v8::Object::New(isolate);
   Local<v8::Object> obj2 = v8::Object::New(isolate);
-  v8::UniquePersistent<v8::Object> obj3(isolate, v8::Object::New(isolate));
+  v8::Global<v8::Object> obj3(isolate, v8::Object::New(isolate));
 
   CHECK(vector.IsEmpty());
   CHECK_EQ(0, static_cast<int>(vector.Size()));