webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 54 insertions, 5 deletions

diff --git a/Source/WTF/wtf/GetPtr.h b/Source/WTF/wtf/GetPtr.h
index 25a0e6d9b..78107cbe5 100644
--- a/Source/WTF/wtf/GetPtr.h
+++ b/Source/WTF/wtf/GetPtr.h
@@ -1,5 +1,5 @@
 /*
- *  Copyright (C) 2006 Apple Computer, Inc.
+ *  Copyright (C) 2006 Apple Inc.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
@@ -21,12 +21,61 @@
 #ifndef WTF_GetPtr_h
 #define WTF_GetPtr_h
 
+#include <memory>
+
 namespace WTF {
 
-    template <typename T> inline T* getPtr(T* p)
-    {
-        return p;
-    }
+enum HashTableDeletedValueType { HashTableDeletedValue };
+enum HashTableEmptyValueType { HashTableEmptyValue };
+
+template <typename T> inline T* getPtr(T* p) { return p; }
+
+template <typename T> struct IsSmartPtr {
+    static const bool value = false;
+};
+
+template <typename T, bool isSmartPtr>
+struct GetPtrHelperBase;
+
+template <typename T>
+struct GetPtrHelperBase<T, false /* isSmartPtr */> {
+    typedef T* PtrType;
+    static T* getPtr(T& p) { return std::addressof(p); }
+};
+
+template <typename T>
+struct GetPtrHelperBase<T, true /* isSmartPtr */> {
+    typedef typename T::PtrType PtrType;
+    static PtrType getPtr(const T& p) { return p.get(); }
+};
+
+template <typename T>
+struct GetPtrHelper : GetPtrHelperBase<T, IsSmartPtr<T>::value> {
+};
+
+template <typename T>
+inline typename GetPtrHelper<T>::PtrType getPtr(T& p)
+{
+    return GetPtrHelper<T>::getPtr(p);
+}
+
+template <typename T>
+inline typename GetPtrHelper<T>::PtrType getPtr(const T& p)
+{
+    return GetPtrHelper<T>::getPtr(p);
+}
+
+// Explicit specialization for C++ standard library types.
+
+template <typename T, typename Deleter> struct IsSmartPtr<std::unique_ptr<T, Deleter>> {
+    static const bool value = true;
+};
+
+template <typename T, typename Deleter>
+struct GetPtrHelper<std::unique_ptr<T, Deleter>> {
+    typedef T* PtrType;
+    static T* getPtr(const std::unique_ptr<T, Deleter>& p) { return p.get(); }
+};
 
 } // namespace WTF