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comparison: media/omx-plugin/include/ics/utils/StrongPointer.h
media/omx-plugin/include/ics/utils/StrongPointer.h
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:30c70bd95c3c |
|---|---|
| 1 /* | |
| 2 * Copyright (C) 2005 The Android Open Source Project | |
| 3 * | |
| 4 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 * you may not use this file except in compliance with the License. | |
| 6 * You may obtain a copy of the License at | |
| 7 * | |
| 8 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 * | |
| 10 * Unless required by applicable law or agreed to in writing, software | |
| 11 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 * See the License for the specific language governing permissions and | |
| 14 * limitations under the License. | |
| 15 */ | |
| 16 | |
| 17 #ifndef ANDROID_STRONG_POINTER_H | |
| 18 #define ANDROID_STRONG_POINTER_H | |
| 19 | |
| 20 #include <cutils/atomic.h> | |
| 21 | |
| 22 #include <stdint.h> | |
| 23 #include <sys/types.h> | |
| 24 #include <stdlib.h> | |
| 25 | |
| 26 // --------------------------------------------------------------------------- | |
| 27 namespace android { | |
| 28 | |
| 29 class TextOutput; | |
| 30 TextOutput& printStrongPointer(TextOutput& to, const void* val); | |
| 31 | |
| 32 template<typename T> class wp; | |
| 33 | |
| 34 // --------------------------------------------------------------------------- | |
| 35 | |
| 36 #define COMPARE(_op_) \ | |
| 37 inline bool operator _op_ (const sp<T>& o) const { \ | |
| 38 return m_ptr _op_ o.m_ptr; \ | |
| 39 } \ | |
| 40 inline bool operator _op_ (const T* o) const { \ | |
| 41 return m_ptr _op_ o; \ | |
| 42 } \ | |
| 43 template<typename U> \ | |
| 44 inline bool operator _op_ (const sp<U>& o) const { \ | |
| 45 return m_ptr _op_ o.m_ptr; \ | |
| 46 } \ | |
| 47 template<typename U> \ | |
| 48 inline bool operator _op_ (const U* o) const { \ | |
| 49 return m_ptr _op_ o; \ | |
| 50 } \ | |
| 51 inline bool operator _op_ (const wp<T>& o) const { \ | |
| 52 return m_ptr _op_ o.m_ptr; \ | |
| 53 } \ | |
| 54 template<typename U> \ | |
| 55 inline bool operator _op_ (const wp<U>& o) const { \ | |
| 56 return m_ptr _op_ o.m_ptr; \ | |
| 57 } | |
| 58 | |
| 59 // --------------------------------------------------------------------------- | |
| 60 | |
| 61 template <typename T> | |
| 62 class sp | |
| 63 { | |
| 64 public: | |
| 65 inline sp() : m_ptr(0) { } | |
| 66 | |
| 67 sp(T* other); | |
| 68 sp(const sp<T>& other); | |
| 69 template<typename U> sp(U* other); | |
| 70 template<typename U> sp(const sp<U>& other); | |
| 71 | |
| 72 ~sp(); | |
| 73 | |
| 74 // Assignment | |
| 75 | |
| 76 sp& operator = (T* other); | |
| 77 sp& operator = (const sp<T>& other); | |
| 78 | |
| 79 template<typename U> sp& operator = (const sp<U>& other); | |
| 80 template<typename U> sp& operator = (U* other); | |
| 81 | |
| 82 //! Special optimization for use by ProcessState (and nobody else). | |
| 83 void force_set(T* other); | |
| 84 | |
| 85 // Reset | |
| 86 | |
| 87 void clear(); | |
| 88 | |
| 89 // Accessors | |
| 90 | |
| 91 inline T& operator* () const { return *m_ptr; } | |
| 92 inline T* operator-> () const { return m_ptr; } | |
| 93 inline T* get() const { return m_ptr; } | |
| 94 | |
| 95 // Operators | |
| 96 | |
| 97 COMPARE(==) | |
| 98 COMPARE(!=) | |
| 99 COMPARE(>) | |
| 100 COMPARE(<) | |
| 101 COMPARE(<=) | |
| 102 COMPARE(>=) | |
| 103 | |
| 104 private: | |
| 105 template<typename Y> friend class sp; | |
| 106 template<typename Y> friend class wp; | |
| 107 void set_pointer(T* ptr); | |
| 108 T* m_ptr; | |
| 109 }; | |
| 110 | |
| 111 #undef COMPARE | |
| 112 | |
| 113 template <typename T> | |
| 114 TextOutput& operator<<(TextOutput& to, const sp<T>& val); | |
| 115 | |
| 116 // --------------------------------------------------------------------------- | |
| 117 // No user serviceable parts below here. | |
| 118 | |
| 119 template<typename T> | |
| 120 sp<T>::sp(T* other) | |
| 121 : m_ptr(other) | |
| 122 { | |
| 123 if (other) other->incStrong(this); | |
| 124 } | |
| 125 | |
| 126 template<typename T> | |
| 127 sp<T>::sp(const sp<T>& other) | |
| 128 : m_ptr(other.m_ptr) | |
| 129 { | |
| 130 if (m_ptr) m_ptr->incStrong(this); | |
| 131 } | |
| 132 | |
| 133 template<typename T> template<typename U> | |
| 134 sp<T>::sp(U* other) : m_ptr(other) | |
| 135 { | |
| 136 if (other) ((T*)other)->incStrong(this); | |
| 137 } | |
| 138 | |
| 139 template<typename T> template<typename U> | |
| 140 sp<T>::sp(const sp<U>& other) | |
| 141 : m_ptr(other.m_ptr) | |
| 142 { | |
| 143 if (m_ptr) m_ptr->incStrong(this); | |
| 144 } | |
| 145 | |
| 146 template<typename T> | |
| 147 sp<T>::~sp() | |
| 148 { | |
| 149 if (m_ptr) m_ptr->decStrong(this); | |
| 150 } | |
| 151 | |
| 152 template<typename T> | |
| 153 sp<T>& sp<T>::operator = (const sp<T>& other) { | |
| 154 T* otherPtr(other.m_ptr); | |
| 155 if (otherPtr) otherPtr->incStrong(this); | |
| 156 if (m_ptr) m_ptr->decStrong(this); | |
| 157 m_ptr = otherPtr; | |
| 158 return *this; | |
| 159 } | |
| 160 | |
| 161 template<typename T> | |
| 162 sp<T>& sp<T>::operator = (T* other) | |
| 163 { | |
| 164 if (other) other->incStrong(this); | |
| 165 if (m_ptr) m_ptr->decStrong(this); | |
| 166 m_ptr = other; | |
| 167 return *this; | |
| 168 } | |
| 169 | |
| 170 template<typename T> template<typename U> | |
| 171 sp<T>& sp<T>::operator = (const sp<U>& other) | |
| 172 { | |
| 173 T* otherPtr(other.m_ptr); | |
| 174 if (otherPtr) otherPtr->incStrong(this); | |
| 175 if (m_ptr) m_ptr->decStrong(this); | |
| 176 m_ptr = otherPtr; | |
| 177 return *this; | |
| 178 } | |
| 179 | |
| 180 template<typename T> template<typename U> | |
| 181 sp<T>& sp<T>::operator = (U* other) | |
| 182 { | |
| 183 if (other) ((T*)other)->incStrong(this); | |
| 184 if (m_ptr) m_ptr->decStrong(this); | |
| 185 m_ptr = other; | |
| 186 return *this; | |
| 187 } | |
| 188 | |
| 189 template<typename T> | |
| 190 void sp<T>::force_set(T* other) | |
| 191 { | |
| 192 other->forceIncStrong(this); | |
| 193 m_ptr = other; | |
| 194 } | |
| 195 | |
| 196 template<typename T> | |
| 197 void sp<T>::clear() | |
| 198 { | |
| 199 if (m_ptr) { | |
| 200 m_ptr->decStrong(this); | |
| 201 m_ptr = 0; | |
| 202 } | |
| 203 } | |
| 204 | |
| 205 template<typename T> | |
| 206 void sp<T>::set_pointer(T* ptr) { | |
| 207 m_ptr = ptr; | |
| 208 } | |
| 209 | |
| 210 template <typename T> | |
| 211 inline TextOutput& operator<<(TextOutput& to, const sp<T>& val) | |
| 212 { | |
| 213 return printStrongPointer(to, val.get()); | |
| 214 } | |
| 215 | |
| 216 }; // namespace android | |
| 217 | |
| 218 // --------------------------------------------------------------------------- | |
| 219 | |
| 220 #endif // ANDROID_STRONG_POINTER_H |
