The Tor Browser / file comparison
comparison: gfx/skia/trunk/include/utils/win/SkTScopedComPtr.h
gfx/skia/trunk/include/utils/win/SkTScopedComPtr.h
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
equal
deleted
inserted
replaced
| -1:000000000000 | 0:aeffe19c87f9 |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 #ifndef SkTScopedComPtr_DEFINED | |
| 10 #define SkTScopedComPtr_DEFINED | |
| 11 | |
| 12 #include "SkTypes.h" | |
| 13 #include "SkTemplates.h" | |
| 14 | |
| 15 template<typename T> | |
| 16 class SkBlockComRef : public T { | |
| 17 private: | |
| 18 virtual ULONG STDMETHODCALLTYPE AddRef(void) = 0; | |
| 19 virtual ULONG STDMETHODCALLTYPE Release(void) = 0; | |
| 20 }; | |
| 21 | |
| 22 template<typename T> T* SkRefComPtr(T* ptr) { | |
| 23 ptr->AddRef(); | |
| 24 return ptr; | |
| 25 } | |
| 26 | |
| 27 template<typename T> T* SkSafeRefComPtr(T* ptr) { | |
| 28 if (ptr) { | |
| 29 ptr->AddRef(); | |
| 30 } | |
| 31 return ptr; | |
| 32 } | |
| 33 | |
| 34 template<typename T> | |
| 35 class SkTScopedComPtr : SkNoncopyable { | |
| 36 private: | |
| 37 T *fPtr; | |
| 38 | |
| 39 public: | |
| 40 explicit SkTScopedComPtr(T *ptr = NULL) : fPtr(ptr) { } | |
| 41 ~SkTScopedComPtr() { | |
| 42 this->reset(); | |
| 43 } | |
| 44 T &operator*() const { SkASSERT(fPtr != NULL); return *fPtr; } | |
| 45 SkBlockComRef<T> *operator->() const { | |
| 46 return static_cast<SkBlockComRef<T>*>(fPtr); | |
| 47 } | |
| 48 /** | |
| 49 * Returns the address of the underlying pointer. | |
| 50 * This is dangerous -- it breaks encapsulation and the reference escapes. | |
| 51 * Must only be used on instances currently pointing to NULL, | |
| 52 * and only to initialize the instance. | |
| 53 */ | |
| 54 T **operator&() { SkASSERT(fPtr == NULL); return &fPtr; } | |
| 55 T *get() const { return fPtr; } | |
| 56 void reset() { | |
| 57 if (NULL != this->fPtr) { | |
| 58 this->fPtr->Release(); | |
| 59 this->fPtr = NULL; | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 void swap(SkTScopedComPtr<T>& that) { | |
| 64 T* temp = this->fPtr; | |
| 65 this->fPtr = that.fPtr; | |
| 66 that.fPtr = temp; | |
| 67 } | |
| 68 | |
| 69 T* release() { | |
| 70 T* temp = this->fPtr; | |
| 71 this->fPtr = NULL; | |
| 72 return temp; | |
| 73 } | |
| 74 }; | |
| 75 | |
| 76 #endif |
