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platform/SharedPtr.h@172:65be27845400, 2019-02-20 (annotated)
- Committer:
- AnnaBridge
- Date:
- Wed Feb 20 20:53:29 2019 +0000
- Revision:
- 172:65be27845400
- Parent:
- 171:3a7713b1edbc
mbed library release version 165
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
AnnaBridge | 171:3a7713b1edbc | 1 | /* mbed Microcontroller Library |
AnnaBridge | 171:3a7713b1edbc | 2 | * Copyright (c) 2006-2018 ARM Limited |
AnnaBridge | 172:65be27845400 | 3 | * SPDX-License-Identifier: Apache-2.0 |
AnnaBridge | 171:3a7713b1edbc | 4 | * |
AnnaBridge | 171:3a7713b1edbc | 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
AnnaBridge | 171:3a7713b1edbc | 6 | * you may not use this file except in compliance with the License. |
AnnaBridge | 171:3a7713b1edbc | 7 | * You may obtain a copy of the License at |
AnnaBridge | 171:3a7713b1edbc | 8 | * |
AnnaBridge | 171:3a7713b1edbc | 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
AnnaBridge | 171:3a7713b1edbc | 10 | * |
AnnaBridge | 171:3a7713b1edbc | 11 | * Unless required by applicable law or agreed to in writing, software |
AnnaBridge | 171:3a7713b1edbc | 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
AnnaBridge | 171:3a7713b1edbc | 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
AnnaBridge | 171:3a7713b1edbc | 14 | * See the License for the specific language governing permissions and |
AnnaBridge | 171:3a7713b1edbc | 15 | * limitations under the License. |
AnnaBridge | 171:3a7713b1edbc | 16 | */ |
AnnaBridge | 171:3a7713b1edbc | 17 | |
AnnaBridge | 171:3a7713b1edbc | 18 | #ifndef __SHAREDPTR_H__ |
AnnaBridge | 171:3a7713b1edbc | 19 | #define __SHAREDPTR_H__ |
AnnaBridge | 171:3a7713b1edbc | 20 | |
AnnaBridge | 171:3a7713b1edbc | 21 | #include <stdlib.h> |
AnnaBridge | 171:3a7713b1edbc | 22 | |
AnnaBridge | 171:3a7713b1edbc | 23 | #include <stdint.h> |
AnnaBridge | 171:3a7713b1edbc | 24 | #include <stddef.h> |
AnnaBridge | 171:3a7713b1edbc | 25 | |
AnnaBridge | 171:3a7713b1edbc | 26 | #include "platform/mbed_critical.h" |
AnnaBridge | 171:3a7713b1edbc | 27 | |
AnnaBridge | 172:65be27845400 | 28 | namespace mbed { |
AnnaBridge | 172:65be27845400 | 29 | |
AnnaBridge | 171:3a7713b1edbc | 30 | /** Shared pointer class. |
AnnaBridge | 171:3a7713b1edbc | 31 | * |
AnnaBridge | 171:3a7713b1edbc | 32 | * A shared pointer is a "smart" pointer that retains ownership of an object using |
AnnaBridge | 172:65be27845400 | 33 | * reference counting across all smart pointers referencing that object. |
AnnaBridge | 171:3a7713b1edbc | 34 | * |
AnnaBridge | 171:3a7713b1edbc | 35 | * @code |
AnnaBridge | 171:3a7713b1edbc | 36 | * #include "platform/SharedPtr.h" |
AnnaBridge | 171:3a7713b1edbc | 37 | * |
AnnaBridge | 171:3a7713b1edbc | 38 | * void test() { |
AnnaBridge | 171:3a7713b1edbc | 39 | * struct MyStruct { int a; }; |
AnnaBridge | 171:3a7713b1edbc | 40 | * |
AnnaBridge | 171:3a7713b1edbc | 41 | * // Create shared pointer |
AnnaBridge | 171:3a7713b1edbc | 42 | * SharedPtr<MyStruct> ptr( new MyStruct ); |
AnnaBridge | 171:3a7713b1edbc | 43 | * |
AnnaBridge | 171:3a7713b1edbc | 44 | * // Increase reference count |
AnnaBridge | 171:3a7713b1edbc | 45 | * SharedPtr<MyStruct> ptr2( ptr ); |
AnnaBridge | 171:3a7713b1edbc | 46 | * |
AnnaBridge | 171:3a7713b1edbc | 47 | * ptr = NULL; // Reference to the struct instance is still held by ptr2 |
AnnaBridge | 171:3a7713b1edbc | 48 | * |
AnnaBridge | 171:3a7713b1edbc | 49 | * ptr2 = NULL; // The raw pointer is freed |
AnnaBridge | 171:3a7713b1edbc | 50 | * } |
AnnaBridge | 171:3a7713b1edbc | 51 | * @endcode |
AnnaBridge | 171:3a7713b1edbc | 52 | * |
AnnaBridge | 171:3a7713b1edbc | 53 | * |
AnnaBridge | 171:3a7713b1edbc | 54 | * It is similar to the std::shared_ptr class introduced in C++11; |
AnnaBridge | 171:3a7713b1edbc | 55 | * however, this is not a compatible implementation (no weak pointer, no make_shared, no custom deleters and so on.) |
AnnaBridge | 171:3a7713b1edbc | 56 | * |
AnnaBridge | 171:3a7713b1edbc | 57 | * Usage: SharedPtr<Class> ptr(new Class()) |
AnnaBridge | 171:3a7713b1edbc | 58 | * |
AnnaBridge | 171:3a7713b1edbc | 59 | * When ptr is passed around by value, the copy constructor and |
AnnaBridge | 171:3a7713b1edbc | 60 | * destructor manages the reference count of the raw pointer. |
AnnaBridge | 171:3a7713b1edbc | 61 | * If the counter reaches zero, delete is called on the raw pointer. |
AnnaBridge | 171:3a7713b1edbc | 62 | * |
AnnaBridge | 171:3a7713b1edbc | 63 | * To avoid loops, use "weak" references by calling the original |
AnnaBridge | 171:3a7713b1edbc | 64 | * pointer directly through ptr.get(). |
AnnaBridge | 171:3a7713b1edbc | 65 | */ |
AnnaBridge | 171:3a7713b1edbc | 66 | |
AnnaBridge | 171:3a7713b1edbc | 67 | template <class T> |
AnnaBridge | 171:3a7713b1edbc | 68 | class SharedPtr { |
AnnaBridge | 171:3a7713b1edbc | 69 | public: |
AnnaBridge | 171:3a7713b1edbc | 70 | /** |
AnnaBridge | 171:3a7713b1edbc | 71 | * @brief Create empty SharedPtr not pointing to anything. |
AnnaBridge | 171:3a7713b1edbc | 72 | * @details Used for variable declaration. |
AnnaBridge | 171:3a7713b1edbc | 73 | */ |
AnnaBridge | 171:3a7713b1edbc | 74 | SharedPtr(): _ptr(NULL), _counter(NULL) |
AnnaBridge | 171:3a7713b1edbc | 75 | { |
AnnaBridge | 171:3a7713b1edbc | 76 | } |
AnnaBridge | 171:3a7713b1edbc | 77 | |
AnnaBridge | 171:3a7713b1edbc | 78 | /** |
AnnaBridge | 171:3a7713b1edbc | 79 | * @brief Create new SharedPtr |
AnnaBridge | 171:3a7713b1edbc | 80 | * @param ptr Pointer to take control over |
AnnaBridge | 171:3a7713b1edbc | 81 | */ |
AnnaBridge | 171:3a7713b1edbc | 82 | SharedPtr(T *ptr): _ptr(ptr), _counter(NULL) |
AnnaBridge | 171:3a7713b1edbc | 83 | { |
AnnaBridge | 171:3a7713b1edbc | 84 | // Allocate counter on the heap, so it can be shared |
AnnaBridge | 171:3a7713b1edbc | 85 | if (_ptr != NULL) { |
AnnaBridge | 171:3a7713b1edbc | 86 | _counter = new uint32_t; |
AnnaBridge | 171:3a7713b1edbc | 87 | *_counter = 1; |
AnnaBridge | 171:3a7713b1edbc | 88 | } |
AnnaBridge | 171:3a7713b1edbc | 89 | } |
AnnaBridge | 171:3a7713b1edbc | 90 | |
AnnaBridge | 171:3a7713b1edbc | 91 | /** |
AnnaBridge | 171:3a7713b1edbc | 92 | * @brief Destructor. |
AnnaBridge | 171:3a7713b1edbc | 93 | * @details Decrement reference counter, and delete object if no longer pointed to. |
AnnaBridge | 171:3a7713b1edbc | 94 | */ |
AnnaBridge | 171:3a7713b1edbc | 95 | ~SharedPtr() |
AnnaBridge | 171:3a7713b1edbc | 96 | { |
AnnaBridge | 171:3a7713b1edbc | 97 | decrement_counter(); |
AnnaBridge | 171:3a7713b1edbc | 98 | } |
AnnaBridge | 171:3a7713b1edbc | 99 | |
AnnaBridge | 171:3a7713b1edbc | 100 | /** |
AnnaBridge | 171:3a7713b1edbc | 101 | * @brief Copy constructor. |
AnnaBridge | 171:3a7713b1edbc | 102 | * @details Create new SharedPtr from other SharedPtr by |
AnnaBridge | 171:3a7713b1edbc | 103 | * copying pointer to original object and pointer to counter. |
AnnaBridge | 171:3a7713b1edbc | 104 | * @param source Object being copied from. |
AnnaBridge | 171:3a7713b1edbc | 105 | */ |
AnnaBridge | 171:3a7713b1edbc | 106 | SharedPtr(const SharedPtr &source): _ptr(source._ptr), _counter(source._counter) |
AnnaBridge | 171:3a7713b1edbc | 107 | { |
AnnaBridge | 171:3a7713b1edbc | 108 | // Increment reference counter |
AnnaBridge | 171:3a7713b1edbc | 109 | if (_ptr != NULL) { |
AnnaBridge | 171:3a7713b1edbc | 110 | core_util_atomic_incr_u32(_counter, 1); |
AnnaBridge | 171:3a7713b1edbc | 111 | } |
AnnaBridge | 171:3a7713b1edbc | 112 | } |
AnnaBridge | 171:3a7713b1edbc | 113 | |
AnnaBridge | 171:3a7713b1edbc | 114 | /** |
AnnaBridge | 171:3a7713b1edbc | 115 | * @brief Assignment operator. |
AnnaBridge | 171:3a7713b1edbc | 116 | * @details Cleanup previous reference and assign new pointer and counter. |
AnnaBridge | 171:3a7713b1edbc | 117 | * @param source Object being assigned from. |
AnnaBridge | 171:3a7713b1edbc | 118 | * @return Object being assigned. |
AnnaBridge | 171:3a7713b1edbc | 119 | */ |
AnnaBridge | 171:3a7713b1edbc | 120 | SharedPtr operator=(const SharedPtr &source) |
AnnaBridge | 171:3a7713b1edbc | 121 | { |
AnnaBridge | 171:3a7713b1edbc | 122 | if (this != &source) { |
AnnaBridge | 171:3a7713b1edbc | 123 | // Clean up by decrementing counter |
AnnaBridge | 171:3a7713b1edbc | 124 | decrement_counter(); |
AnnaBridge | 171:3a7713b1edbc | 125 | |
AnnaBridge | 171:3a7713b1edbc | 126 | // Assign new values |
AnnaBridge | 171:3a7713b1edbc | 127 | _ptr = source.get(); |
AnnaBridge | 171:3a7713b1edbc | 128 | _counter = source.get_counter(); |
AnnaBridge | 171:3a7713b1edbc | 129 | |
AnnaBridge | 171:3a7713b1edbc | 130 | // Increment new counter |
AnnaBridge | 171:3a7713b1edbc | 131 | if (_ptr != NULL) { |
AnnaBridge | 171:3a7713b1edbc | 132 | core_util_atomic_incr_u32(_counter, 1); |
AnnaBridge | 171:3a7713b1edbc | 133 | } |
AnnaBridge | 171:3a7713b1edbc | 134 | } |
AnnaBridge | 171:3a7713b1edbc | 135 | |
AnnaBridge | 171:3a7713b1edbc | 136 | return *this; |
AnnaBridge | 171:3a7713b1edbc | 137 | } |
AnnaBridge | 171:3a7713b1edbc | 138 | |
AnnaBridge | 171:3a7713b1edbc | 139 | /** |
AnnaBridge | 171:3a7713b1edbc | 140 | * @brief Replaces the managed pointer with a new unmanaged pointer. |
AnnaBridge | 171:3a7713b1edbc | 141 | * @param[in] ptr the new raw pointer to manage. |
AnnaBridge | 171:3a7713b1edbc | 142 | */ |
AnnaBridge | 171:3a7713b1edbc | 143 | void reset(T *ptr) |
AnnaBridge | 171:3a7713b1edbc | 144 | { |
AnnaBridge | 171:3a7713b1edbc | 145 | // Clean up by decrementing counter |
AnnaBridge | 171:3a7713b1edbc | 146 | decrement_counter(); |
AnnaBridge | 171:3a7713b1edbc | 147 | |
AnnaBridge | 172:65be27845400 | 148 | _ptr = ptr; |
AnnaBridge | 171:3a7713b1edbc | 149 | if (ptr != NULL) { |
AnnaBridge | 171:3a7713b1edbc | 150 | // Allocate counter on the heap, so it can be shared |
AnnaBridge | 171:3a7713b1edbc | 151 | _counter = new uint32_t; |
AnnaBridge | 171:3a7713b1edbc | 152 | *_counter = 1; |
AnnaBridge | 172:65be27845400 | 153 | } else { |
AnnaBridge | 172:65be27845400 | 154 | _counter = NULL; |
AnnaBridge | 171:3a7713b1edbc | 155 | } |
AnnaBridge | 171:3a7713b1edbc | 156 | } |
AnnaBridge | 171:3a7713b1edbc | 157 | |
AnnaBridge | 171:3a7713b1edbc | 158 | /** |
AnnaBridge | 171:3a7713b1edbc | 159 | * @brief Replace the managed pointer with a NULL pointer. |
AnnaBridge | 171:3a7713b1edbc | 160 | */ |
AnnaBridge | 171:3a7713b1edbc | 161 | void reset() |
AnnaBridge | 171:3a7713b1edbc | 162 | { |
AnnaBridge | 171:3a7713b1edbc | 163 | reset(NULL); |
AnnaBridge | 171:3a7713b1edbc | 164 | } |
AnnaBridge | 171:3a7713b1edbc | 165 | |
AnnaBridge | 171:3a7713b1edbc | 166 | /** |
AnnaBridge | 171:3a7713b1edbc | 167 | * @brief Raw pointer accessor. |
AnnaBridge | 171:3a7713b1edbc | 168 | * @details Get raw pointer to object pointed to. |
AnnaBridge | 171:3a7713b1edbc | 169 | * @return Pointer. |
AnnaBridge | 171:3a7713b1edbc | 170 | */ |
AnnaBridge | 171:3a7713b1edbc | 171 | T *get() const |
AnnaBridge | 171:3a7713b1edbc | 172 | { |
AnnaBridge | 171:3a7713b1edbc | 173 | return _ptr; |
AnnaBridge | 171:3a7713b1edbc | 174 | } |
AnnaBridge | 171:3a7713b1edbc | 175 | |
AnnaBridge | 171:3a7713b1edbc | 176 | /** |
AnnaBridge | 171:3a7713b1edbc | 177 | * @brief Reference count accessor. |
AnnaBridge | 171:3a7713b1edbc | 178 | * @return Reference count. |
AnnaBridge | 171:3a7713b1edbc | 179 | */ |
AnnaBridge | 171:3a7713b1edbc | 180 | uint32_t use_count() const |
AnnaBridge | 171:3a7713b1edbc | 181 | { |
AnnaBridge | 171:3a7713b1edbc | 182 | if (_ptr != NULL) { |
AnnaBridge | 171:3a7713b1edbc | 183 | core_util_critical_section_enter(); |
AnnaBridge | 171:3a7713b1edbc | 184 | uint32_t current_counter = *_counter; |
AnnaBridge | 171:3a7713b1edbc | 185 | core_util_critical_section_exit(); |
AnnaBridge | 171:3a7713b1edbc | 186 | return current_counter; |
AnnaBridge | 171:3a7713b1edbc | 187 | } else { |
AnnaBridge | 171:3a7713b1edbc | 188 | return 0; |
AnnaBridge | 171:3a7713b1edbc | 189 | } |
AnnaBridge | 171:3a7713b1edbc | 190 | } |
AnnaBridge | 171:3a7713b1edbc | 191 | |
AnnaBridge | 171:3a7713b1edbc | 192 | /** |
AnnaBridge | 171:3a7713b1edbc | 193 | * @brief Dereference object operator. |
AnnaBridge | 171:3a7713b1edbc | 194 | * @details Override to return the object pointed to. |
AnnaBridge | 171:3a7713b1edbc | 195 | */ |
AnnaBridge | 171:3a7713b1edbc | 196 | T &operator*() const |
AnnaBridge | 171:3a7713b1edbc | 197 | { |
AnnaBridge | 171:3a7713b1edbc | 198 | return *_ptr; |
AnnaBridge | 171:3a7713b1edbc | 199 | } |
AnnaBridge | 171:3a7713b1edbc | 200 | |
AnnaBridge | 171:3a7713b1edbc | 201 | /** |
AnnaBridge | 171:3a7713b1edbc | 202 | * @brief Dereference object member operator. |
AnnaBridge | 171:3a7713b1edbc | 203 | * @details Override to return return member in object pointed to. |
AnnaBridge | 171:3a7713b1edbc | 204 | */ |
AnnaBridge | 171:3a7713b1edbc | 205 | T *operator->() const |
AnnaBridge | 171:3a7713b1edbc | 206 | { |
AnnaBridge | 171:3a7713b1edbc | 207 | return _ptr; |
AnnaBridge | 171:3a7713b1edbc | 208 | } |
AnnaBridge | 171:3a7713b1edbc | 209 | |
AnnaBridge | 171:3a7713b1edbc | 210 | /** |
AnnaBridge | 171:3a7713b1edbc | 211 | * @brief Boolean conversion operator. |
AnnaBridge | 171:3a7713b1edbc | 212 | * @return Whether or not the pointer is NULL. |
AnnaBridge | 171:3a7713b1edbc | 213 | */ |
AnnaBridge | 171:3a7713b1edbc | 214 | operator bool() const |
AnnaBridge | 171:3a7713b1edbc | 215 | { |
AnnaBridge | 171:3a7713b1edbc | 216 | return (_ptr != NULL); |
AnnaBridge | 171:3a7713b1edbc | 217 | } |
AnnaBridge | 171:3a7713b1edbc | 218 | |
AnnaBridge | 171:3a7713b1edbc | 219 | private: |
AnnaBridge | 171:3a7713b1edbc | 220 | /** |
AnnaBridge | 171:3a7713b1edbc | 221 | * @brief Get pointer to reference counter. |
AnnaBridge | 171:3a7713b1edbc | 222 | * @return Pointer to reference counter. |
AnnaBridge | 171:3a7713b1edbc | 223 | */ |
AnnaBridge | 171:3a7713b1edbc | 224 | uint32_t *get_counter() const |
AnnaBridge | 171:3a7713b1edbc | 225 | { |
AnnaBridge | 171:3a7713b1edbc | 226 | return _counter; |
AnnaBridge | 171:3a7713b1edbc | 227 | } |
AnnaBridge | 171:3a7713b1edbc | 228 | |
AnnaBridge | 171:3a7713b1edbc | 229 | /** |
AnnaBridge | 171:3a7713b1edbc | 230 | * @brief Decrement reference counter. |
AnnaBridge | 171:3a7713b1edbc | 231 | * @details If count reaches zero, free counter and delete object pointed to. |
AnnaBridge | 172:65be27845400 | 232 | * Does not modify our own pointers - assumption is they will be overwritten |
AnnaBridge | 172:65be27845400 | 233 | * or destroyed immediately afterwards. |
AnnaBridge | 171:3a7713b1edbc | 234 | */ |
AnnaBridge | 171:3a7713b1edbc | 235 | void decrement_counter() |
AnnaBridge | 171:3a7713b1edbc | 236 | { |
AnnaBridge | 171:3a7713b1edbc | 237 | if (_ptr != NULL) { |
AnnaBridge | 171:3a7713b1edbc | 238 | uint32_t new_value = core_util_atomic_decr_u32(_counter, 1); |
AnnaBridge | 171:3a7713b1edbc | 239 | if (new_value == 0) { |
AnnaBridge | 171:3a7713b1edbc | 240 | delete _counter; |
AnnaBridge | 171:3a7713b1edbc | 241 | delete _ptr; |
AnnaBridge | 171:3a7713b1edbc | 242 | } |
AnnaBridge | 171:3a7713b1edbc | 243 | } |
AnnaBridge | 171:3a7713b1edbc | 244 | } |
AnnaBridge | 171:3a7713b1edbc | 245 | |
AnnaBridge | 171:3a7713b1edbc | 246 | private: |
AnnaBridge | 171:3a7713b1edbc | 247 | // Pointer to shared object |
AnnaBridge | 171:3a7713b1edbc | 248 | T *_ptr; |
AnnaBridge | 171:3a7713b1edbc | 249 | |
AnnaBridge | 171:3a7713b1edbc | 250 | // Pointer to shared reference counter |
AnnaBridge | 171:3a7713b1edbc | 251 | uint32_t *_counter; |
AnnaBridge | 171:3a7713b1edbc | 252 | }; |
AnnaBridge | 171:3a7713b1edbc | 253 | |
AnnaBridge | 171:3a7713b1edbc | 254 | /** Non-member relational operators. |
AnnaBridge | 171:3a7713b1edbc | 255 | */ |
AnnaBridge | 171:3a7713b1edbc | 256 | template <class T, class U> |
AnnaBridge | 171:3a7713b1edbc | 257 | bool operator== (const SharedPtr<T> &lhs, const SharedPtr<U> &rhs) |
AnnaBridge | 171:3a7713b1edbc | 258 | { |
AnnaBridge | 171:3a7713b1edbc | 259 | return (lhs.get() == rhs.get()); |
AnnaBridge | 171:3a7713b1edbc | 260 | } |
AnnaBridge | 171:3a7713b1edbc | 261 | |
AnnaBridge | 171:3a7713b1edbc | 262 | template <class T, typename U> |
AnnaBridge | 171:3a7713b1edbc | 263 | bool operator== (const SharedPtr<T> &lhs, U rhs) |
AnnaBridge | 171:3a7713b1edbc | 264 | { |
AnnaBridge | 171:3a7713b1edbc | 265 | return (lhs.get() == (T *) rhs); |
AnnaBridge | 171:3a7713b1edbc | 266 | } |
AnnaBridge | 171:3a7713b1edbc | 267 | |
AnnaBridge | 171:3a7713b1edbc | 268 | template <class T, typename U> |
AnnaBridge | 171:3a7713b1edbc | 269 | bool operator== (U lhs, const SharedPtr<T> &rhs) |
AnnaBridge | 171:3a7713b1edbc | 270 | { |
AnnaBridge | 171:3a7713b1edbc | 271 | return ((T *) lhs == rhs.get()); |
AnnaBridge | 171:3a7713b1edbc | 272 | } |
AnnaBridge | 171:3a7713b1edbc | 273 | |
AnnaBridge | 171:3a7713b1edbc | 274 | /** Non-member relational operators. |
AnnaBridge | 171:3a7713b1edbc | 275 | */ |
AnnaBridge | 171:3a7713b1edbc | 276 | template <class T, class U> |
AnnaBridge | 171:3a7713b1edbc | 277 | bool operator!= (const SharedPtr<T> &lhs, const SharedPtr<U> &rhs) |
AnnaBridge | 171:3a7713b1edbc | 278 | { |
AnnaBridge | 171:3a7713b1edbc | 279 | return (lhs.get() != rhs.get()); |
AnnaBridge | 171:3a7713b1edbc | 280 | } |
AnnaBridge | 171:3a7713b1edbc | 281 | |
AnnaBridge | 171:3a7713b1edbc | 282 | template <class T, typename U> |
AnnaBridge | 171:3a7713b1edbc | 283 | bool operator!= (const SharedPtr<T> &lhs, U rhs) |
AnnaBridge | 171:3a7713b1edbc | 284 | { |
AnnaBridge | 171:3a7713b1edbc | 285 | return (lhs.get() != (T *) rhs); |
AnnaBridge | 171:3a7713b1edbc | 286 | } |
AnnaBridge | 171:3a7713b1edbc | 287 | |
AnnaBridge | 171:3a7713b1edbc | 288 | template <class T, typename U> |
AnnaBridge | 171:3a7713b1edbc | 289 | bool operator!= (U lhs, const SharedPtr<T> &rhs) |
AnnaBridge | 171:3a7713b1edbc | 290 | { |
AnnaBridge | 171:3a7713b1edbc | 291 | return ((T *) lhs != rhs.get()); |
AnnaBridge | 171:3a7713b1edbc | 292 | } |
AnnaBridge | 171:3a7713b1edbc | 293 | |
AnnaBridge | 172:65be27845400 | 294 | } /* namespace mbed */ |
AnnaBridge | 172:65be27845400 | 295 | |
AnnaBridge | 172:65be27845400 | 296 | #ifndef MBED_NO_GLOBAL_USING_DIRECTIVE |
AnnaBridge | 172:65be27845400 | 297 | using mbed::SharedPtr; |
AnnaBridge | 172:65be27845400 | 298 | #endif |
AnnaBridge | 172:65be27845400 | 299 | |
AnnaBridge | 171:3a7713b1edbc | 300 | #endif // __SHAREDPTR_H__ |