Bug 392493 - "Add forget() method to nsCOMPtr and nsRefPtr". r=dbaron, a=bzbarsky.

xpcom/base/nsAutoPtr.h

@@ -1032,6 +1032,16 @@ class nsRefPtr
           mRawPtr = temp;
         }
 
+      already_AddRefed<T>
+      forget()
+          // return the value of mRawPtr and null out mRawPtr. Useful for
+          // already_AddRefed return values.
+        {
+          T* temp = 0;
+          swap(temp);
+          return temp;
+        }
+
       T*
       get() const
           /*

xpcom/glue/nsCOMPtr.h

@@ -819,6 +819,16 @@ class nsCOMPtr
 
         // Other pointer operators
 
+      already_AddRefed<T>
+      forget()
+          // return the value of mRawPtr and null out mRawPtr. Useful for
+          // already_AddRefed return values.
+        {
+          T* temp = 0;
+          swap(temp);
+          return temp;
+        }
+
       T*
       get() const
           /*