Temp_inlines.hh

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/* Temp_* classes implementation: inline functions.
   Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
   Copyright (C) 2010-2016 BUGSENG srl (http://bugseng.com)

This file is part of the Parma Polyhedra Library (PPL).

The PPL is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

The PPL is distributed in the hope that it will be useful, 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
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.

For the most up-to-date information see the Parma Polyhedra Library
site: http://bugseng.com/products/ppl/ . */

#ifndef PPL_Temp_inlines_hh
#define PPL_Temp_inlines_hh 1

#include "meta_programming.hh"

namespace Parma_Polyhedra_Library {

template <typename T>
inline
Temp_Item<T>::Temp_Item()
  : item_() {
}

template <typename T>
inline T&
Temp_Item<T>::item() {
    return item_;
}

template <typename T>
inline
Temp_Item<T>::Free_List::Free_List()
  : head_ptr(0) {
}

template <typename T>
inline Temp_Item<T>*&
Temp_Item<T>::free_list_ref() {
  static Free_List free_list;
  return free_list.head_ptr;
}

template <typename T>
inline Temp_Item<T>&
Temp_Item<T>::obtain() {
  Temp_Item* const p = free_list_ref();
  if (p != 0) {
    free_list_ref() = p->next;
    return *p;
  }
  else {
    return *new Temp_Item();
  }
}

template <typename T>
inline void
Temp_Item<T>::release(Temp_Item& p) {
  p.next = free_list_ref();
  free_list_ref() = &p;
}

template <typename T>
inline
Temp_Reference_Holder<T>::Temp_Reference_Holder()
  : held(Temp_Item<T>::obtain()) {
}

template <typename T>
inline
Temp_Reference_Holder<T>::~Temp_Reference_Holder() {
  Temp_Item<T>::release(held);
}

template <typename T>
inline T&
Temp_Reference_Holder<T>::item() {
  return held.item();
}

template <typename T>
inline
Temp_Value_Holder<T>::Temp_Value_Holder() {
}

template <typename T>
inline T&
Temp_Value_Holder<T>::item() {
  return item_;
}

} // namespace Parma_Polyhedra_Library

#define PPL_DIRTY_TEMP(T, id)                                           \
  Parma_Polyhedra_Library::Dirty_Temp<PPL_U(T)> holder_ ## id;          \
  PPL_U(T)& PPL_U(id) = holder_ ## id.item()

#endif // !defined(PPL_Temp_inlines_hh)