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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
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 SkRefCnt_DEFINED | 8 #ifndef SkRefCnt_DEFINED |
9 #define SkRefCnt_DEFINED | 9 #define SkRefCnt_DEFINED |
10 | 10 |
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94 if (1 == fRefCnt.fetch_add(-1, std::memory_order_acq_rel)) { | 94 if (1 == fRefCnt.fetch_add(-1, std::memory_order_acq_rel)) { |
95 // Like unique(), the acquire is only needed on success, to make sur
e | 95 // Like unique(), the acquire is only needed on success, to make sur
e |
96 // code in internal_dispose() doesn't happen before the decrement. | 96 // code in internal_dispose() doesn't happen before the decrement. |
97 this->internal_dispose(); | 97 this->internal_dispose(); |
98 } | 98 } |
99 } | 99 } |
100 | 100 |
101 protected: | 101 protected: |
102 /** | 102 /** |
103 * Allow subclasses to call this if they've overridden internal_dispose | 103 * Allow subclasses to call this if they've overridden internal_dispose |
104 * so they can reset fRefCnt before the destructor is called. Should only | 104 * so they can reset fRefCnt before the destructor is called or if they |
105 * be called right before calling through to inherited internal_dispose() | 105 * choose not to call the destructor (e.g. using a free list). |
106 * or before calling the destructor. | |
107 */ | 106 */ |
108 void internal_dispose_restore_refcnt_to_1() const { | 107 void internal_dispose_restore_refcnt_to_1() const { |
109 #ifdef SK_DEBUG | |
110 SkASSERT(0 == getRefCnt()); | 108 SkASSERT(0 == getRefCnt()); |
111 fRefCnt.store(1, std::memory_order_relaxed); | 109 fRefCnt.store(1, std::memory_order_relaxed); |
112 #endif | |
113 } | 110 } |
114 | 111 |
115 private: | 112 private: |
116 /** | 113 /** |
117 * Called when the ref count goes to 0. | 114 * Called when the ref count goes to 0. |
118 */ | 115 */ |
119 virtual void internal_dispose() const { | 116 virtual void internal_dispose() const { |
120 this->internal_dispose_restore_refcnt_to_1(); | 117 this->internal_dispose_restore_refcnt_to_1(); |
121 delete this; | 118 delete this; |
122 } | 119 } |
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460 * | 457 * |
461 * This function may be helpful while we convert callers from ptr-based to sk_s
p-based parameters. | 458 * This function may be helpful while we convert callers from ptr-based to sk_s
p-based parameters. |
462 */ | 459 */ |
463 template <typename T> sk_sp<T> sk_ref_sp(T* obj) { | 460 template <typename T> sk_sp<T> sk_ref_sp(T* obj) { |
464 return sk_sp<T>(SkSafeRef(obj)); | 461 return sk_sp<T>(SkSafeRef(obj)); |
465 } | 462 } |
466 | 463 |
467 #endif | 464 #endif |
468 | 465 |
469 #endif | 466 #endif |
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