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/*
* Copyright (c) 2015, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SRC_COMPONENTS_INCLUDE_UTILS_MAKE_SHARED_H_
#define SRC_COMPONENTS_INCLUDE_UTILS_MAKE_SHARED_H_
#include <new>
/**
* @brief The functions set below allows to create shared pointer in a safe way.
* There are up to 5 parameters could be passed as the constructor parameters.
*
* @example
* struct A {
* A(int){}
* A(int, double) {}
* A(int, double, std::string) {}
* }
* SharedPtr<A> shared1(MakeShared<A>(5);
* SharedPtr<A> shared2(MakeShared<A>(5, 5.5);
* SharedPtr<A> shared3(MakeShared<A>(5, 5.5, std::string("MyStr"));
*
* The profit in using MakeShared instead of simple allocation with operator new is evident.
* Firstly it allows us to centralize allocation place, secondly it allows us to use
* safe operator new overloading (no throwable one).
*/
namespace utils {
template <typename T> class SharedPtr;
namespace {
template <typename T>
SharedPtr<T>Initialize(T* object) {
return object == NULL ? SharedPtr<T>() : SharedPtr<T>(object);
}
}
template<typename T>
SharedPtr<T> MakeShared() {
T* t = new (std::nothrow) T;
return Initialize(t);
}
template<typename T, typename Arg1>
SharedPtr<T> MakeShared(const Arg1& arg1) {
T* t = new (std::nothrow) T(arg1);
return Initialize(t);
}
template<typename T, typename Arg1, typename Arg2>
SharedPtr<T> MakeShared(const Arg1& arg1, const Arg2& arg2) {
T* t = new (std::nothrow) T(arg1, arg2);
return Initialize(t);
}
template<typename T, typename Arg1, typename Arg2, typename Arg3>
SharedPtr<T> MakeShared(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3) {
T* t = new (std::nothrow) T(arg1, arg2, arg3);
return Initialize(t);
}
template<typename T, typename Arg1, typename Arg2, typename Arg3, typename Arg4>
SharedPtr<T> MakeShared(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3, const Arg4& arg4) {
T* t = new (std::nothrow) T(arg1, arg2, arg3, arg4);
return Initialize(t);
}
template<typename T, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5>
SharedPtr<T> MakeShared(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3, const Arg4& arg4, const Arg5& arg5) {
T* t = new (std::nothrow) T(arg1, arg2, arg3, arg4, arg5);
return Initialize(t);
}
template<typename T, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5, typename Arg6>
SharedPtr<T> MakeShared(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3, const Arg4& arg4, const Arg5& arg5, const Arg6& arg6) {
T* t = new (std::nothrow) T(arg1, arg2, arg3, arg4, arg5, arg6);
return Initialize(t);
}
} // namespace utils;
#endif // SRC_COMPONENTS_INCLUDE_UTILS_MAKE_SHARED_H_
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