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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium 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 TOOLS_ANDROID_FORWARDER2_SELF_DELETER_HELPER_H_ | 5 #ifndef TOOLS_ANDROID_FORWARDER2_SELF_DELETER_HELPER_H_ |
| 6 #define TOOLS_ANDROID_FORWARDER2_SELF_DELETER_HELPER_H_ | 6 #define TOOLS_ANDROID_FORWARDER2_SELF_DELETER_HELPER_H_ |
| 7 | 7 |
| 8 #include <memory> | 8 #include <memory> |
| 9 | 9 |
| 10 #include "base/bind.h" | 10 #include "base/bind.h" |
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| 100 typedef base::Callback<void(std::unique_ptr<T>)> DeletionCallback; | 100 typedef base::Callback<void(std::unique_ptr<T>)> DeletionCallback; |
| 101 | 101 |
| 102 SelfDeleterHelper(T* self_deleting_object, | 102 SelfDeleterHelper(T* self_deleting_object, |
| 103 const DeletionCallback& deletion_callback) | 103 const DeletionCallback& deletion_callback) |
| 104 : construction_runner_(base::ThreadTaskRunnerHandle::Get()), | 104 : construction_runner_(base::ThreadTaskRunnerHandle::Get()), |
| 105 self_deleting_object_(self_deleting_object), | 105 self_deleting_object_(self_deleting_object), |
| 106 deletion_callback_(deletion_callback), | 106 deletion_callback_(deletion_callback), |
| 107 weak_ptr_factory_(this) {} | 107 weak_ptr_factory_(this) {} |
| 108 | 108 |
| 109 ~SelfDeleterHelper() { | 109 ~SelfDeleterHelper() { |
| 110 DCHECK(construction_runner_->RunsTasksOnCurrentThread()); | 110 DCHECK(construction_runner_->RunsTasksInCurrentSequence()); |
| 111 } | 111 } |
| 112 | 112 |
| 113 void MaybeSelfDeleteSoon() { | 113 void MaybeSelfDeleteSoon() { |
| 114 DCHECK(!construction_runner_->RunsTasksOnCurrentThread()); | 114 DCHECK(!construction_runner_->RunsTasksInCurrentSequence()); |
| 115 construction_runner_->PostTask( | 115 construction_runner_->PostTask( |
| 116 FROM_HERE, | 116 FROM_HERE, |
| 117 base::Bind(&SelfDeleterHelper::SelfDelete, | 117 base::Bind(&SelfDeleterHelper::SelfDelete, |
| 118 weak_ptr_factory_.GetWeakPtr())); | 118 weak_ptr_factory_.GetWeakPtr())); |
| 119 } | 119 } |
| 120 | 120 |
| 121 private: | 121 private: |
| 122 void SelfDelete() { | 122 void SelfDelete() { |
| 123 DCHECK(construction_runner_->RunsTasksOnCurrentThread()); | 123 DCHECK(construction_runner_->RunsTasksInCurrentSequence()); |
| 124 deletion_callback_.Run(base::WrapUnique(self_deleting_object_)); | 124 deletion_callback_.Run(base::WrapUnique(self_deleting_object_)); |
| 125 } | 125 } |
| 126 | 126 |
| 127 const scoped_refptr<base::SingleThreadTaskRunner> construction_runner_; | 127 const scoped_refptr<base::SingleThreadTaskRunner> construction_runner_; |
| 128 T* const self_deleting_object_; | 128 T* const self_deleting_object_; |
| 129 const DeletionCallback deletion_callback_; | 129 const DeletionCallback deletion_callback_; |
| 130 | 130 |
| 131 //WeakPtrFactory's documentation says: | 131 //WeakPtrFactory's documentation says: |
| 132 // Member variables should appear before the WeakPtrFactory, to ensure | 132 // Member variables should appear before the WeakPtrFactory, to ensure |
| 133 // that any WeakPtrs to Controller are invalidated before its members | 133 // that any WeakPtrs to Controller are invalidated before its members |
| 134 // variable's destructors are executed, rendering them invalid. | 134 // variable's destructors are executed, rendering them invalid. |
| 135 base::WeakPtrFactory<SelfDeleterHelper<T> > weak_ptr_factory_; | 135 base::WeakPtrFactory<SelfDeleterHelper<T> > weak_ptr_factory_; |
| 136 | 136 |
| 137 DISALLOW_COPY_AND_ASSIGN(SelfDeleterHelper); | 137 DISALLOW_COPY_AND_ASSIGN(SelfDeleterHelper); |
| 138 }; | 138 }; |
| 139 | 139 |
| 140 } // namespace forwarder2 | 140 } // namespace forwarder2 |
| 141 | 141 |
| 142 #endif // TOOLS_ANDROID_FORWARDER2_SELF_DELETER_HELPER_H_ | 142 #endif // TOOLS_ANDROID_FORWARDER2_SELF_DELETER_HELPER_H_ |
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