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1 /* | 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
2 * Copyright (C) 2013 Google, Inc. All Rights Reserved. | 2 // Use of this source code is governed by a BSD-style license that can be |
3 * | 3 // found in the LICENSE file. |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions | |
6 * are met: | |
7 * 1. Redistributions of source code must retain the above copyright | |
8 * notice, this list of conditions and the following disclaimer. | |
9 * 2. Redistributions in binary form must reproduce the above copyright | |
10 * notice, this list of conditions and the following disclaimer in the | |
11 * documentation and/or other materials provided with the distribution. | |
12 * | |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 */ | |
25 | 4 |
26 #ifndef WTF_WeakPtr_h | 5 #include "platform/wtf/WeakPtr.h" |
27 #define WTF_WeakPtr_h | |
28 | 6 |
29 #include "base/memory/weak_ptr.h" | 7 // The contents of this header was moved to platform/wtf as part of |
30 #include "wtf/Noncopyable.h" | 8 // WTF migration project. See the following post for details: |
31 | 9 // https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gY
CAAJ |
32 namespace WTF { | |
33 | |
34 template <typename T> | |
35 using WeakPtr = base::WeakPtr<T>; | |
36 | |
37 template <typename T> | |
38 class WeakPtrFactory { | |
39 WTF_MAKE_NONCOPYABLE(WeakPtrFactory<T>); | |
40 USING_FAST_MALLOC(WeakPtrFactory); | |
41 | |
42 public: | |
43 explicit WeakPtrFactory(T* ptr) : m_factory(ptr) {} | |
44 | |
45 WeakPtr<T> createWeakPtr() { return m_factory.GetWeakPtr(); } | |
46 | |
47 void revokeAll() { m_factory.InvalidateWeakPtrs(); } | |
48 | |
49 bool hasWeakPtrs() const { return m_factory.HasWeakPtrs(); } | |
50 | |
51 private: | |
52 base::WeakPtrFactory<T> m_factory; | |
53 }; | |
54 | |
55 } // namespace WTF | |
56 | |
57 using WTF::WeakPtr; | |
58 using WTF::WeakPtrFactory; | |
59 | |
60 #endif | |
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