OLD | NEW |
| (Empty) |
1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef MOJO_PUBLIC_BINDINGS_LIB_SHARED_PTR_H_ | |
6 #define MOJO_PUBLIC_BINDINGS_LIB_SHARED_PTR_H_ | |
7 | |
8 #include "mojo/public/bindings/lib/shared_data.h" | |
9 | |
10 namespace mojo { | |
11 namespace internal { | |
12 | |
13 // Used to manage a heap-allocated instance of P that can be shared via | |
14 // reference counting. When the last reference is dropped, the instance is | |
15 // deleted. | |
16 template <typename P> | |
17 class SharedPtr { | |
18 public: | |
19 SharedPtr() {} | |
20 | |
21 explicit SharedPtr(P* ptr) { | |
22 impl_.mutable_value()->ptr = ptr; | |
23 } | |
24 | |
25 // Default copy-constructor and assignment operator are OK. | |
26 | |
27 P* get() { | |
28 return impl_.value().ptr; | |
29 } | |
30 const P* get() const { | |
31 return impl_.value().ptr; | |
32 } | |
33 | |
34 P* operator->() { return get(); } | |
35 const P* operator->() const { return get(); } | |
36 | |
37 private: | |
38 class Impl { | |
39 public: | |
40 ~Impl() { | |
41 if (ptr) | |
42 delete ptr; | |
43 } | |
44 | |
45 Impl() : ptr(NULL) { | |
46 } | |
47 | |
48 Impl(P* ptr) : ptr(ptr) { | |
49 } | |
50 | |
51 P* ptr; | |
52 | |
53 private: | |
54 MOJO_DISALLOW_COPY_AND_ASSIGN(Impl); | |
55 }; | |
56 | |
57 SharedData<Impl> impl_; | |
58 }; | |
59 | |
60 } // namespace mojo | |
61 } // namespace internal | |
62 | |
63 #endif // MOJO_PUBLIC_BINDINGS_LIB_SHARED_PTR_H_ | |
OLD | NEW |