The Tor Browser / file comparison
comparison: dom/bindings/OwningNonNull.h
dom/bindings/OwningNonNull.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:2e2c6112892a |
|---|---|
| 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 /* A class for non-null strong pointers to reference-counted objects. */ | |
| 8 | |
| 9 #ifndef mozilla_dom_OwningNonNull_h | |
| 10 #define mozilla_dom_OwningNonNull_h | |
| 11 | |
| 12 #include "nsAutoPtr.h" | |
| 13 | |
| 14 namespace mozilla { | |
| 15 namespace dom { | |
| 16 | |
| 17 template<class T> | |
| 18 class OwningNonNull | |
| 19 { | |
| 20 public: | |
| 21 OwningNonNull() | |
| 22 #ifdef DEBUG | |
| 23 : mInited(false) | |
| 24 #endif | |
| 25 {} | |
| 26 | |
| 27 operator T&() | |
| 28 { | |
| 29 MOZ_ASSERT(mInited); | |
| 30 MOZ_ASSERT(mPtr, "OwningNonNull<T> was set to null"); | |
| 31 return *mPtr; | |
| 32 } | |
| 33 | |
| 34 operator T*() | |
| 35 { | |
| 36 MOZ_ASSERT(mInited); | |
| 37 MOZ_ASSERT(mPtr, "OwningNonNull<T> was set to null"); | |
| 38 return mPtr; | |
| 39 } | |
| 40 | |
| 41 void operator=(T* aValue) | |
| 42 { | |
| 43 init(aValue); | |
| 44 } | |
| 45 | |
| 46 void operator=(const already_AddRefed<T>& aValue) | |
| 47 { | |
| 48 init(aValue); | |
| 49 } | |
| 50 | |
| 51 already_AddRefed<T> forget() | |
| 52 { | |
| 53 #ifdef DEBUG | |
| 54 mInited = false; | |
| 55 #endif | |
| 56 return mPtr.forget(); | |
| 57 } | |
| 58 | |
| 59 // Make us work with smart pointer helpers that expect a get(). | |
| 60 T* get() const | |
| 61 { | |
| 62 MOZ_ASSERT(mInited); | |
| 63 MOZ_ASSERT(mPtr); | |
| 64 return mPtr; | |
| 65 } | |
| 66 | |
| 67 protected: | |
| 68 template<typename U> | |
| 69 void init(U aValue) | |
| 70 { | |
| 71 mPtr = aValue; | |
| 72 MOZ_ASSERT(mPtr); | |
| 73 #ifdef DEBUG | |
| 74 mInited = true; | |
| 75 #endif | |
| 76 } | |
| 77 | |
| 78 nsRefPtr<T> mPtr; | |
| 79 #ifdef DEBUG | |
| 80 bool mInited; | |
| 81 #endif | |
| 82 }; | |
| 83 | |
| 84 } // namespace dom | |
| 85 } // namespace mozilla | |
| 86 | |
| 87 #endif // mozilla_dom_OwningNonNull_h |
