OLD | NEW |
1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkTScopedComPtr_DEFINED | 8 #ifndef SkTScopedComPtr_DEFINED |
9 #define SkTScopedComPtr_DEFINED | 9 #define SkTScopedComPtr_DEFINED |
10 | 10 |
11 #include "../../private/SkLeanWindows.h" | 11 #include "SkLeanWindows.h" |
12 | 12 |
13 #ifdef SK_BUILD_FOR_WIN | 13 #ifdef SK_BUILD_FOR_WIN |
14 | 14 |
15 template<typename T> | 15 template<typename T> |
16 class SkBlockComRef : public T { | 16 class SkBlockComRef : public T { |
17 private: | 17 private: |
18 virtual ULONG STDMETHODCALLTYPE AddRef(void) = 0; | 18 virtual ULONG STDMETHODCALLTYPE AddRef(void) = 0; |
19 virtual ULONG STDMETHODCALLTYPE Release(void) = 0; | 19 virtual ULONG STDMETHODCALLTYPE Release(void) = 0; |
20 }; | 20 }; |
21 | 21 |
22 template<typename T> T* SkRefComPtr(T* ptr) { | 22 template<typename T> T* SkRefComPtr(T* ptr) { |
23 ptr->AddRef(); | 23 ptr->AddRef(); |
24 return ptr; | 24 return ptr; |
25 } | 25 } |
26 | 26 |
27 template<typename T> T* SkSafeRefComPtr(T* ptr) { | 27 template<typename T> T* SkSafeRefComPtr(T* ptr) { |
28 if (ptr) { | 28 if (ptr) { |
29 ptr->AddRef(); | 29 ptr->AddRef(); |
30 } | 30 } |
31 return ptr; | 31 return ptr; |
32 } | 32 } |
33 | 33 |
34 template<typename T> | 34 template<typename T> |
35 class SkTScopedComPtr : SkNoncopyable { | 35 class SkTScopedComPtr : SkNoncopyable { |
36 private: | 36 private: |
37 T *fPtr; | 37 T *fPtr; |
38 | 38 |
39 public: | 39 public: |
40 explicit SkTScopedComPtr(T *ptr = NULL) : fPtr(ptr) { } | 40 explicit SkTScopedComPtr(T *ptr = nullptr) : fPtr(ptr) { } |
41 ~SkTScopedComPtr() { | 41 |
42 this->reset(); | 42 ~SkTScopedComPtr() { this->reset();} |
43 } | 43 |
44 T &operator*() const { SkASSERT(fPtr != NULL); return *fPtr; } | 44 T &operator*() const { SkASSERT(fPtr != nullptr); return *fPtr; } |
45 SkBlockComRef<T> *operator->() const { | 45 |
46 return static_cast<SkBlockComRef<T>*>(fPtr); | 46 explicit operator bool() const { return fPtr != nullptr; } |
47 } | 47 |
| 48 SkBlockComRef<T> *operator->() const { return static_cast<SkBlockComRef<T>*>
(fPtr); } |
| 49 |
48 /** | 50 /** |
49 * Returns the address of the underlying pointer. | 51 * Returns the address of the underlying pointer. |
50 * This is dangerous -- it breaks encapsulation and the reference escapes. | 52 * This is dangerous -- it breaks encapsulation and the reference escapes. |
51 * Must only be used on instances currently pointing to NULL, | 53 * Must only be used on instances currently pointing to NULL, |
52 * and only to initialize the instance. | 54 * and only to initialize the instance. |
53 */ | 55 */ |
54 T **operator&() { SkASSERT(fPtr == NULL); return &fPtr; } | 56 T **operator&() { SkASSERT(fPtr == nullptr); return &fPtr; } |
| 57 |
55 T *get() const { return fPtr; } | 58 T *get() const { return fPtr; } |
| 59 |
56 void reset() { | 60 void reset() { |
57 if (this->fPtr) { | 61 if (this->fPtr) { |
58 this->fPtr->Release(); | 62 this->fPtr->Release(); |
59 this->fPtr = NULL; | 63 this->fPtr = nullptr; |
60 } | 64 } |
61 } | 65 } |
62 | 66 |
63 void swap(SkTScopedComPtr<T>& that) { | 67 void swap(SkTScopedComPtr<T>& that) { |
64 T* temp = this->fPtr; | 68 T* temp = this->fPtr; |
65 this->fPtr = that.fPtr; | 69 this->fPtr = that.fPtr; |
66 that.fPtr = temp; | 70 that.fPtr = temp; |
67 } | 71 } |
68 | 72 |
69 T* release() { | 73 T* release() { |
70 T* temp = this->fPtr; | 74 T* temp = this->fPtr; |
71 this->fPtr = NULL; | 75 this->fPtr = nullptr; |
72 return temp; | 76 return temp; |
73 } | 77 } |
74 }; | 78 }; |
75 | 79 |
76 #endif // SK_BUILD_FOR_WIN | 80 #endif // SK_BUILD_FOR_WIN |
77 #endif // SkTScopedComPtr_DEFINED | 81 #endif // SkTScopedComPtr_DEFINED |
OLD | NEW |