Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : /* Smart pointer which leaks its owning refcounted object by default. */
       8             : 
       9             : #ifndef LeakRefPtr_h
      10             : #define LeakRefPtr_h
      11             : 
      12             : #include "mozilla/AlreadyAddRefed.h"
      13             : 
      14             : namespace mozilla {
      15             : 
      16             : /**
      17             :  * Instance of this class behaves like a raw pointer which leaks the
      18             :  * resource it's owning if not explicitly released.
      19             :  */
      20             : template<class T>
      21             : class LeakRefPtr
      22             : {
      23             : public:
      24        3572 :   explicit LeakRefPtr(already_AddRefed<T>&& aPtr)
      25        3572 :     : mRawPtr(aPtr.take()) { }
      26             : 
      27        1580 :   explicit operator bool() const { return !!mRawPtr; }
      28             : 
      29             :   LeakRefPtr<T>& operator=(already_AddRefed<T>&& aPtr)
      30             :   {
      31             :     mRawPtr = aPtr.take();
      32             :     return *this;
      33             :   }
      34             : 
      35             :   T* get() const { return mRawPtr; }
      36             : 
      37        3572 :   already_AddRefed<T> take()
      38             :   {
      39        3572 :     T* rawPtr = mRawPtr;
      40        3572 :     mRawPtr = nullptr;
      41        3572 :     return already_AddRefed<T>(rawPtr);
      42             :   }
      43             : 
      44             :   void release() { NS_RELEASE(mRawPtr); }
      45             : 
      46             : private:
      47             :   T* MOZ_OWNING_REF mRawPtr;
      48             : };
      49             : 
      50             : } // namespace mozilla
      51             : 
      52             : #endif // LeakRefPtr_h