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Side by Side Diff: src/utils/win/SkTScopedComPtr.h

Issue 2070983002: Move headers in include/utils/win to src/utils/win. (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Really rebase. Created 4 years, 6 months ago
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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
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