1 /* Temp_* classes implementation: inline functions.
2 Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
3 Copyright (C) 2010-2016 BUGSENG srl (http://bugseng.com)
4
5 This file is part of the Parma Polyhedra Library (PPL).
6
7 The PPL is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 3 of the License, or (at your
10 option) any later version.
11
12 The PPL is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software Foundation,
19 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
20
21 For the most up-to-date information see the Parma Polyhedra Library
22 site: http://bugseng.com/products/ppl/ . */
23
24 #ifndef PPL_Temp_inlines_hh
25 #define PPL_Temp_inlines_hh 1
26
27 #include "meta_programming.hh"
28
29 namespace Parma_Polyhedra_Library {
30
31 template <typename T>
32 inline
Temp_Item()33 Temp_Item<T>::Temp_Item()
34 : item_() {
35 }
36
37 template <typename T>
38 inline T&
item()39 Temp_Item<T>::item() {
40 return item_;
41 }
42
43 template <typename T>
44 inline
Free_List()45 Temp_Item<T>::Free_List::Free_List()
46 : head_ptr(0) {
47 }
48
49 template <typename T>
50 inline Temp_Item<T>*&
free_list_ref()51 Temp_Item<T>::free_list_ref() {
52 static Free_List free_list;
53 return free_list.head_ptr;
54 }
55
56 template <typename T>
57 inline Temp_Item<T>&
obtain()58 Temp_Item<T>::obtain() {
59 Temp_Item* const p = free_list_ref();
60 if (p != 0) {
61 free_list_ref() = p->next;
62 return *p;
63 }
64 else {
65 return *new Temp_Item();
66 }
67 }
68
69 template <typename T>
70 inline void
release(Temp_Item & p)71 Temp_Item<T>::release(Temp_Item& p) {
72 p.next = free_list_ref();
73 free_list_ref() = &p;
74 }
75
76 template <typename T>
77 inline
Temp_Reference_Holder()78 Temp_Reference_Holder<T>::Temp_Reference_Holder()
79 : held(Temp_Item<T>::obtain()) {
80 }
81
82 template <typename T>
83 inline
~Temp_Reference_Holder()84 Temp_Reference_Holder<T>::~Temp_Reference_Holder() {
85 Temp_Item<T>::release(held);
86 }
87
88 template <typename T>
89 inline T&
item()90 Temp_Reference_Holder<T>::item() {
91 return held.item();
92 }
93
94 template <typename T>
95 inline
Temp_Value_Holder()96 Temp_Value_Holder<T>::Temp_Value_Holder() {
97 }
98
99 template <typename T>
100 inline T&
item()101 Temp_Value_Holder<T>::item() {
102 return item_;
103 }
104
105 } // namespace Parma_Polyhedra_Library
106
107 #define PPL_DIRTY_TEMP(T, id) \
108 Parma_Polyhedra_Library::Dirty_Temp<PPL_U(T)> holder_ ## id; \
109 PPL_U(T)& PPL_U(id) = holder_ ## id.item()
110
111 #endif // !defined(PPL_Temp_inlines_hh)
112