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| 1 // Copyright 2016 PDFium Authors. All rights reserved. | 1 // Copyright 2016 PDFium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef CORE_FXCRT_INCLUDE_CFX_OBSERVABLE_H_ | 5 #ifndef CORE_FXCRT_CFX_OBSERVABLE_H_ |
| 6 #define CORE_FXCRT_INCLUDE_CFX_OBSERVABLE_H_ | 6 #define CORE_FXCRT_CFX_OBSERVABLE_H_ |
| 7 | 7 |
| 8 #include <set> | 8 #include <set> |
| 9 | 9 |
| 10 #include "core/fxcrt/include/fx_system.h" | 10 #include "core/fxcrt/fx_system.h" |
| 11 #include "third_party/base/stl_util.h" | 11 #include "third_party/base/stl_util.h" |
| 12 | 12 |
| 13 template <class T> | 13 template <class T> |
| 14 class CFX_Observable { | 14 class CFX_Observable { |
| 15 public: | 15 public: |
| 16 class ObservedPtr { | 16 class ObservedPtr { |
| 17 public: | 17 public: |
| 18 ObservedPtr() : m_pObservedPtr(nullptr) {} | 18 ObservedPtr() : m_pObservedPtr(nullptr) {} |
| 19 explicit ObservedPtr(T* pObservedPtr) : m_pObservedPtr(pObservedPtr) { | 19 explicit ObservedPtr(T* pObservedPtr) : m_pObservedPtr(pObservedPtr) { |
| 20 if (m_pObservedPtr) | 20 if (m_pObservedPtr) |
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| 68 } | 68 } |
| 69 CFX_Observable& operator=(const CFX_Observable& that) = delete; | 69 CFX_Observable& operator=(const CFX_Observable& that) = delete; |
| 70 | 70 |
| 71 protected: | 71 protected: |
| 72 size_t ActiveObservedPtrsForTesting() const { return m_ObservedPtrs.size(); } | 72 size_t ActiveObservedPtrsForTesting() const { return m_ObservedPtrs.size(); } |
| 73 | 73 |
| 74 private: | 74 private: |
| 75 std::set<ObservedPtr*> m_ObservedPtrs; | 75 std::set<ObservedPtr*> m_ObservedPtrs; |
| 76 }; | 76 }; |
| 77 | 77 |
| 78 #endif // CORE_FXCRT_INCLUDE_CFX_OBSERVABLE_H_ | 78 #endif // CORE_FXCRT_CFX_OBSERVABLE_H_ |
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