make_shared_ptr.h

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/*
  Copyright (c) 2022, 2025, Oracle and/or its affiliates.
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License, version 2.0,
  as published by the Free Software Foundation.
 
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  as designated in a particular file or component or in included license
  documentation.  The authors of MySQL hereby grant you an additional
  permission to link the program and your derivative works with the
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  the program or referenced in the documentation.
 
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  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
 
  You should have received a copy of the GNU General Public License
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*/
 
#ifndef MYSQL_HARNESS_MAKE_SHARED_PTR_INCLUDED
#define MYSQL_HARNESS_MAKE_SHARED_PTR_INCLUDED
 
#include <memory>
#include <utility>
 
namespace mysql_harness {
 
template <typename T>
class MakeSharedPtr {
 public:
  using shared_ptr = std::shared_ptr<T>;
 
  template <typename... Args>
  MakeSharedPtr(Args &&...args) {
    ptr = std::make_shared<T>(std::forward<Args>(args)...);
  }
 
  operator shared_ptr &() { return ptr; }
 
  operator const shared_ptr &() const { return ptr; }
 
  template <typename Z>
  operator std::shared_ptr<Z>() {
    return ptr;
  }
 
  template <typename Z>
  operator const std::shared_ptr<Z>() const {
    return ptr;
  }
 
  T *get() const { return ptr.get(); }
 
  T &operator*() const { return *ptr; }
 
  T *operator->() const { return get(); }
 
  void reset(T *t) { ptr.reset(t); }
 
  shared_ptr copy_base() { return ptr; }
 
 private:
  shared_ptr ptr;
};
 
}  // namespace mysql_harness
 
#endif  // MYSQL_HARNESS_MAKE_SHARED_PTR_INCLUDED