[89] | 1 | /*
|
---|
| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more
|
---|
| 3 | * contributor license agreements. See the NOTICE file distributed with
|
---|
| 4 | * this work for additional information regarding copyright ownership.
|
---|
| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0
|
---|
| 6 | * (the "License"); you may not use this file except in compliance with
|
---|
| 7 | * the License. You may obtain a copy of the License at
|
---|
| 8 | *
|
---|
| 9 | * http://www.apache.org/licenses/LICENSE-2.0
|
---|
| 10 | *
|
---|
| 11 | * Unless required by applicable law or agreed to in writing, software
|
---|
| 12 | * distributed under the License is distributed on an "AS IS" BASIS,
|
---|
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
---|
| 14 | * See the License for the specific language governing permissions and
|
---|
| 15 | * limitations under the License.
|
---|
| 16 | */
|
---|
| 17 |
|
---|
| 18 | #ifndef _LOG4CXX_HELPERS_OBJECT_PTR_H
|
---|
| 19 | #define _LOG4CXX_HELPERS_OBJECT_PTR_H
|
---|
| 20 |
|
---|
| 21 | #include <log4cxx/log4cxx.h>
|
---|
| 22 |
|
---|
| 23 | //
|
---|
| 24 | // Helgrind (race detection tool for Valgrind) will complain if pointer
|
---|
| 25 | // is not initialized in an atomic operation. Static analysis tools
|
---|
| 26 | // (gcc's -Weffc++, for example) will complain if pointer is not initialized
|
---|
| 27 | // in member initialization list. The use of a macro allows quick
|
---|
| 28 | // switching between the initialization styles.
|
---|
| 29 | //
|
---|
| 30 | #if LOG4CXX_HELGRIND
|
---|
| 31 | #define _LOG4CXX_OBJECTPTR_INIT(x) { exchange(x);
|
---|
| 32 | #else
|
---|
| 33 | #define _LOG4CXX_OBJECTPTR_INIT(x) : p(x) {
|
---|
| 34 | #endif
|
---|
| 35 |
|
---|
| 36 | namespace log4cxx
|
---|
| 37 | {
|
---|
| 38 | namespace helpers
|
---|
| 39 | {
|
---|
| 40 | class Class;
|
---|
| 41 |
|
---|
| 42 | class LOG4CXX_EXPORT ObjectPtrBase {
|
---|
| 43 | public:
|
---|
| 44 | ObjectPtrBase();
|
---|
| 45 | virtual ~ObjectPtrBase();
|
---|
| 46 | static void checkNull(const int& null);
|
---|
| 47 | static void* exchange(void** destination, void* newValue);
|
---|
| 48 | virtual void* cast(const Class& cls) const = 0;
|
---|
| 49 | };
|
---|
| 50 |
|
---|
| 51 |
|
---|
| 52 | /** smart pointer to a Object descendant */
|
---|
| 53 | template<typename T> class ObjectPtrT : public ObjectPtrBase
|
---|
| 54 | {
|
---|
| 55 | public:
|
---|
| 56 | ObjectPtrT(const int& null)
|
---|
| 57 | _LOG4CXX_OBJECTPTR_INIT(0)
|
---|
| 58 | ObjectPtrBase::checkNull(null);
|
---|
| 59 | }
|
---|
| 60 |
|
---|
| 61 | ObjectPtrT()
|
---|
| 62 | _LOG4CXX_OBJECTPTR_INIT(0)
|
---|
| 63 | }
|
---|
| 64 |
|
---|
| 65 | ObjectPtrT(T * p1)
|
---|
| 66 | _LOG4CXX_OBJECTPTR_INIT(p1)
|
---|
| 67 | if (this->p != 0)
|
---|
| 68 | {
|
---|
| 69 | this->p->addRef();
|
---|
| 70 | }
|
---|
| 71 | }
|
---|
| 72 |
|
---|
| 73 |
|
---|
| 74 | ObjectPtrT(const ObjectPtrT& p1)
|
---|
| 75 | _LOG4CXX_OBJECTPTR_INIT(p1.p)
|
---|
| 76 | if (this->p != 0)
|
---|
| 77 | {
|
---|
| 78 | this->p->addRef();
|
---|
| 79 | }
|
---|
| 80 | }
|
---|
| 81 |
|
---|
| 82 | ObjectPtrT(const ObjectPtrBase& p1)
|
---|
| 83 | _LOG4CXX_OBJECTPTR_INIT(reinterpret_cast<T*>(p1.cast(T::getStaticClass())))
|
---|
| 84 | if (this->p != 0) {
|
---|
| 85 | this->p->addRef();
|
---|
| 86 | }
|
---|
| 87 | }
|
---|
| 88 |
|
---|
| 89 | ObjectPtrT(ObjectPtrBase& p1)
|
---|
| 90 | _LOG4CXX_OBJECTPTR_INIT(reinterpret_cast<T*>(p1.cast(T::getStaticClass())))
|
---|
| 91 | if (this->p != 0) {
|
---|
| 92 | this->p->addRef();
|
---|
| 93 | }
|
---|
| 94 | }
|
---|
| 95 |
|
---|
| 96 |
|
---|
| 97 | ~ObjectPtrT()
|
---|
| 98 | {
|
---|
| 99 | if (p != 0) {
|
---|
| 100 | p->releaseRef();
|
---|
| 101 | }
|
---|
| 102 | }
|
---|
| 103 |
|
---|
| 104 | ObjectPtrT& operator=(const ObjectPtrT& p1) {
|
---|
| 105 | T* newPtr = p1.p;
|
---|
| 106 | if (newPtr != 0) {
|
---|
| 107 | newPtr->addRef();
|
---|
| 108 | }
|
---|
| 109 | T* oldPtr = exchange(newPtr);
|
---|
| 110 | if (oldPtr != 0) {
|
---|
| 111 | oldPtr->releaseRef();
|
---|
| 112 | }
|
---|
| 113 | return *this;
|
---|
| 114 | }
|
---|
| 115 |
|
---|
| 116 | ObjectPtrT& operator=(const int& null) //throw(IllegalArgumentException)
|
---|
| 117 | {
|
---|
| 118 | //
|
---|
| 119 | // throws IllegalArgumentException if null != 0
|
---|
| 120 | //
|
---|
| 121 | ObjectPtrBase::checkNull(null);
|
---|
| 122 | T* oldPtr = exchange(0);
|
---|
| 123 | if (oldPtr != 0) {
|
---|
| 124 | oldPtr->releaseRef();
|
---|
| 125 | }
|
---|
| 126 | return *this;
|
---|
| 127 | }
|
---|
| 128 |
|
---|
| 129 | ObjectPtrT& operator=(T* p1) {
|
---|
| 130 | if (p1 != 0) {
|
---|
| 131 | p1->addRef();
|
---|
| 132 | }
|
---|
| 133 | T* oldPtr = exchange(p1);
|
---|
| 134 | if (oldPtr != 0) {
|
---|
| 135 | oldPtr->releaseRef();
|
---|
| 136 | }
|
---|
| 137 | return *this;
|
---|
| 138 | }
|
---|
| 139 |
|
---|
| 140 |
|
---|
| 141 | ObjectPtrT& operator=(ObjectPtrBase& p1) {
|
---|
| 142 | T* newPtr = reinterpret_cast<T*>(p1.cast(T::getStaticClass()));
|
---|
| 143 | return operator=(newPtr);
|
---|
| 144 | }
|
---|
| 145 |
|
---|
| 146 | ObjectPtrT& operator=(const ObjectPtrBase& p1) {
|
---|
| 147 | T* newPtr = reinterpret_cast<T*>(p1.cast(T::getStaticClass()));
|
---|
| 148 | return operator=(newPtr);
|
---|
| 149 | }
|
---|
| 150 |
|
---|
| 151 | bool operator==(const ObjectPtrT& p1) const { return (this->p == p1.p); }
|
---|
| 152 | bool operator!=(const ObjectPtrT& p1) const { return (this->p != p1.p); }
|
---|
| 153 | bool operator<(const ObjectPtrT& p1) const { return (this->p < p1.p); }
|
---|
| 154 | bool operator==(const T* p1) const { return (this->p == p1); }
|
---|
| 155 | bool operator!=(const T* p1) const { return (this->p != p1); }
|
---|
| 156 | bool operator<(const T* p1) const { return (this->p < p1); }
|
---|
| 157 | T* operator->() const {return p; }
|
---|
| 158 | T& operator*() const {return *p; }
|
---|
| 159 | operator T*() const {return p; }
|
---|
| 160 |
|
---|
| 161 |
|
---|
| 162 |
|
---|
| 163 | private:
|
---|
| 164 | T * p;
|
---|
| 165 | virtual void* cast(const Class& cls) const {
|
---|
| 166 | if (p != 0) {
|
---|
| 167 | return const_cast<void*>(p->cast(cls));
|
---|
| 168 | }
|
---|
| 169 | return 0;
|
---|
| 170 | }
|
---|
| 171 | T* exchange(const T* newValue) {
|
---|
| 172 | return static_cast<T*>(ObjectPtrBase::exchange(
|
---|
| 173 | reinterpret_cast<void**>(&p),
|
---|
| 174 | const_cast<T*>(newValue)));
|
---|
| 175 | }
|
---|
| 176 |
|
---|
| 177 | };
|
---|
| 178 |
|
---|
| 179 |
|
---|
| 180 | }
|
---|
| 181 | }
|
---|
| 182 |
|
---|
| 183 | #endif //_LOG4CXX_HELPERS_OBJECT_PTR_H
|
---|