Pfp Cybersecurity (Aka Power Fingerprinting, Inc.) / Mbed OS pfp-emon-nxp

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Dependencies:   FXAS21002 FXOS8700Q

simple-mbed-cloud-client/mbed-cloud-client/mbed-client/source/include/smartpointer.h@0:977e87915078, 2019-08-28 (annotated)

Committer:
vithyat
Date:
Wed Aug 28 19:24:56 2019 +0000
Revision:
0:977e87915078
init

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vithyat 0:977e87915078 1 /*
vithyat 0:977e87915078 2 * Copyright (c) 2015 ARM Limited. All rights reserved.
vithyat 0:977e87915078 3 * SPDX-License-Identifier: Apache-2.0
vithyat 0:977e87915078 4 * Licensed under the Apache License, Version 2.0 (the License); you may
vithyat 0:977e87915078 5 * not use this file except in compliance with the License.
vithyat 0:977e87915078 6 * You may obtain a copy of the License at
vithyat 0:977e87915078 7 *
vithyat 0:977e87915078 8 * http://www.apache.org/licenses/LICENSE-2.0
vithyat 0:977e87915078 9 *
vithyat 0:977e87915078 10 * Unless required by applicable law or agreed to in writing, software
vithyat 0:977e87915078 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
vithyat 0:977e87915078 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
vithyat 0:977e87915078 13 * See the License for the specific language governing permissions and
vithyat 0:977e87915078 14 * limitations under the License.
vithyat 0:977e87915078 15 */
vithyat 0:977e87915078 16 #ifndef SMART_POINTER_H
vithyat 0:977e87915078 17 #define SMART_POINTER_H
vithyat 0:977e87915078 18
vithyat 0:977e87915078 19 class ReferenceCount
vithyat 0:977e87915078 20 {
vithyat 0:977e87915078 21 private:
vithyat 0:977e87915078 22
vithyat 0:977e87915078 23 int _count; // Reference count
vithyat 0:977e87915078 24
vithyat 0:977e87915078 25 public:
vithyat 0:977e87915078 26
vithyat 0:977e87915078 27 void add_ref()
vithyat 0:977e87915078 28 {
vithyat 0:977e87915078 29 // Increment the reference count
vithyat 0:977e87915078 30 _count++;
vithyat 0:977e87915078 31 }
vithyat 0:977e87915078 32
vithyat 0:977e87915078 33 int release()
vithyat 0:977e87915078 34 {
vithyat 0:977e87915078 35 // Decrement the reference count and
vithyat 0:977e87915078 36 // return the reference count.
vithyat 0:977e87915078 37 return --_count;
vithyat 0:977e87915078 38 }
vithyat 0:977e87915078 39 };
vithyat 0:977e87915078 40
vithyat 0:977e87915078 41 template < typename T > class SmartPointer
vithyat 0:977e87915078 42 {
vithyat 0:977e87915078 43 private:
vithyat 0:977e87915078 44
vithyat 0:977e87915078 45 T *_data; // Generic pointer to be stored
vithyat 0:977e87915078 46 ReferenceCount *_reference; // Reference count
vithyat 0:977e87915078 47
vithyat 0:977e87915078 48
vithyat 0:977e87915078 49 public:
vithyat 0:977e87915078 50
vithyat 0:977e87915078 51 SmartPointer()
vithyat 0:977e87915078 52 : _data(0), _reference(0)
vithyat 0:977e87915078 53 {
vithyat 0:977e87915078 54 // Create a new reference
vithyat 0:977e87915078 55 _reference = new ReferenceCount();
vithyat 0:977e87915078 56 // Increment the reference count
vithyat 0:977e87915078 57 _reference->add_ref();
vithyat 0:977e87915078 58 }
vithyat 0:977e87915078 59
vithyat 0:977e87915078 60 SmartPointer(T* value)
vithyat 0:977e87915078 61 : _data(value), _reference(0)
vithyat 0:977e87915078 62 {
vithyat 0:977e87915078 63 // Create a new reference
vithyat 0:977e87915078 64 _reference = new ReferenceCount();
vithyat 0:977e87915078 65 // Increment the reference count
vithyat 0:977e87915078 66 _reference->add_ref();
vithyat 0:977e87915078 67 }
vithyat 0:977e87915078 68
vithyat 0:977e87915078 69 SmartPointer(const SmartPointer<T>& smart_pointer)
vithyat 0:977e87915078 70 : _data(smart_pointer._data), reference(smart_pointer._reference)
vithyat 0:977e87915078 71 {
vithyat 0:977e87915078 72 // Copy constructor
vithyat 0:977e87915078 73 // Copy the data and reference pointer
vithyat 0:977e87915078 74 // and increment the reference count
vithyat 0:977e87915078 75 _reference->add_ref();
vithyat 0:977e87915078 76 }
vithyat 0:977e87915078 77
vithyat 0:977e87915078 78 ~SmartPointer()
vithyat 0:977e87915078 79 {
vithyat 0:977e87915078 80 if(_reference->release() == 0) {
vithyat 0:977e87915078 81 delete _data;
vithyat 0:977e87915078 82 delete _reference;
vithyat 0:977e87915078 83 }
vithyat 0:977e87915078 84 }
vithyat 0:977e87915078 85
vithyat 0:977e87915078 86 T& operator* ()
vithyat 0:977e87915078 87 {
vithyat 0:977e87915078 88 return *_data;
vithyat 0:977e87915078 89 }
vithyat 0:977e87915078 90
vithyat 0:977e87915078 91 T* operator-> ()
vithyat 0:977e87915078 92 {
vithyat 0:977e87915078 93 return _data;
vithyat 0:977e87915078 94 }
vithyat 0:977e87915078 95
vithyat 0:977e87915078 96 SmartPointer<T>& operator = (const SmartPointer<T>& smart_pointer)
vithyat 0:977e87915078 97 {
vithyat 0:977e87915078 98 // Assignment operator
vithyat 0:977e87915078 99 if (this != &SmartPointer) { // Avoid self assignment
vithyat 0:977e87915078 100 // Decrement the old reference count
vithyat 0:977e87915078 101 // if reference become zero delete the old data
vithyat 0:977e87915078 102 if(_reference->release() == 0) {
vithyat 0:977e87915078 103 delete _data;
vithyat 0:977e87915078 104 delete _reference;
vithyat 0:977e87915078 105 }
vithyat 0:977e87915078 106
vithyat 0:977e87915078 107 // Copy the data and reference pointer
vithyat 0:977e87915078 108 // and increment the reference count
vithyat 0:977e87915078 109 _data = SmartPointer._data;
vithyat 0:977e87915078 110 _reference = SmartPointer._reference;
vithyat 0:977e87915078 111 _reference->add_ref();
vithyat 0:977e87915078 112 }
vithyat 0:977e87915078 113 return *this;
vithyat 0:977e87915078 114 }
vithyat 0:977e87915078 115
vithyat 0:977e87915078 116 };
vithyat 0:977e87915078 117
vithyat 0:977e87915078 118 #endif // SMART_POINTER_H