mirror of
https://github.com/Telecominfraproject/wlan-cloud-lib-cppkafka.git
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93e066a1c1
validity. * Removed explicit move semantic when cloning a MessageBuilder. * Renamed clone() to try_clone() in ClonablePtr class.
138 lines
3.7 KiB
C++
138 lines
3.7 KiB
C++
/*
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* Copyright (c) 2017, Matias Fontanini
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef CPPKAFKA_CLONABLE_PTR_H
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#define CPPKAFKA_CLONABLE_PTR_H
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#include <memory>
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namespace cppkafka {
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/**
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* Smart pointer which allows copying via a clone functor
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*/
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template <typename T, typename Deleter, typename Cloner>
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class ClonablePtr {
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public:
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/**
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* \brief Creates an instance
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*
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* \param ptr The pointer to be wrapped
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* \param deleter The deleter functor
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* \param cloner The clone functor
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*/
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ClonablePtr(T* ptr, const Deleter& deleter, const Cloner& cloner)
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: handle_(ptr, deleter), cloner_(cloner) {
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}
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/**
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* \brief Copies the given ClonablePtr
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*
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* Cloning will be done by invoking the Cloner type
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*
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* \param rhs The pointer to be copied
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*/
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ClonablePtr(const ClonablePtr& rhs)
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: handle_(std::unique_ptr<T, Deleter>(rhs.try_clone(), rhs.get_deleter())),
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cloner_(rhs.get_cloner()) {
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}
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/**
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* \brief Copies and assigns the given pointer
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*
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* \param rhs The pointer to be copied
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*/
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ClonablePtr& operator=(const ClonablePtr& rhs) {
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if (this != &rhs) {
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handle_ = std::unique_ptr<T, Deleter>(rhs.try_clone(), rhs.get_deleter());
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cloner_ = rhs.get_cloner();
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}
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return *this;
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}
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ClonablePtr(ClonablePtr&&) = default;
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ClonablePtr& operator=(ClonablePtr&&) = default;
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~ClonablePtr() = default;
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/**
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* \brief Getter for the internal pointer
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*/
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T* get() const {
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return handle_.get();
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}
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/**
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* \brief Releases ownership of the internal pointer
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*/
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T* release() {
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return handle_.release();
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}
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/**
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* \brief Reset the internal pointer to a new one
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*/
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void reset(T* ptr) {
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handle_.reset(ptr);
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}
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/**
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* \brief Get the deleter
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*/
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const Deleter& get_deleter() const {
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return handle_.get_deleter();
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}
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/**
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* \brief Get the cloner
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*/
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const Cloner& get_cloner() const {
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return cloner_;
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}
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/**
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* \brief Indicates whether this ClonablePtr instance is valid (not null)
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*/
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explicit operator bool() const {
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return static_cast<bool>(handle_);
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}
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private:
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T* try_clone() const {
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return cloner_ ? cloner_(get()) : get();
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}
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std::unique_ptr<T, Deleter> handle_;
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Cloner cloner_;
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};
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} // cppkafka
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#endif // CPPKAFKA_CLONABLE_PTR_H
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