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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 SkTLazy_DEFINED | 8 #ifndef SkTLazy_DEFINED |
| 9 #define SkTLazy_DEFINED | 9 #define SkTLazy_DEFINED |
| 10 | 10 |
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| 92 */ | 92 */ |
| 93 T* get() const { SkASSERT(this->isValid()); return fPtr; } | 93 T* get() const { SkASSERT(this->isValid()); return fPtr; } |
| 94 | 94 |
| 95 /** | 95 /** |
| 96 * Like above but doesn't assert if object isn't initialized (in which case | 96 * Like above but doesn't assert if object isn't initialized (in which case |
| 97 * nullptr is returned). | 97 * nullptr is returned). |
| 98 */ | 98 */ |
| 99 T* getMaybeNull() const { return fPtr; } | 99 T* getMaybeNull() const { return fPtr; } |
| 100 | 100 |
| 101 private: | 101 private: |
| 102 T* fPtr; // nullptr or fStorage | |
| 103 SkAlignedSTStorage<1, T> fStorage; | 102 SkAlignedSTStorage<1, T> fStorage; |
| 103 T* fPtr; // nullptr or fStorage |
| 104 }; | 104 }; |
| 105 | 105 |
| 106 /** | 106 /** |
| 107 * A helper built on top of SkTLazy to do copy-on-first-write. The object is ini
tialized | 107 * A helper built on top of SkTLazy to do copy-on-first-write. The object is ini
tialized |
| 108 * with a const pointer but provides a non-const pointer accessor. The first tim
e the | 108 * with a const pointer but provides a non-const pointer accessor. The first tim
e the |
| 109 * accessor is called (if ever) the object is cloned. | 109 * accessor is called (if ever) the object is cloned. |
| 110 * | 110 * |
| 111 * In the following example at most one copy of constThing is made: | 111 * In the following example at most one copy of constThing is made: |
| 112 * | 112 * |
| 113 * SkTCopyOnFirstWrite<Thing> thing(&constThing); | 113 * SkTCopyOnFirstWrite<Thing> thing(&constThing); |
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| 164 operator const T*() const { return fObj; } | 164 operator const T*() const { return fObj; } |
| 165 | 165 |
| 166 const T& operator *() const { return *fObj; } | 166 const T& operator *() const { return *fObj; } |
| 167 | 167 |
| 168 private: | 168 private: |
| 169 const T* fObj; | 169 const T* fObj; |
| 170 SkTLazy<T> fLazy; | 170 SkTLazy<T> fLazy; |
| 171 }; | 171 }; |
| 172 | 172 |
| 173 #endif | 173 #endif |
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