1 /*
2 * Inkscape::GC::Alloc - GC-aware STL allocator
3 *
4 * Copyright 2004 MenTaLguY <mental@rydia.net>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * See the file COPYING for details.
12 *
13 */
15 #ifndef SEEN_INKSCAPE_GC_ALLOC_H
16 #define SEEN_INKSCAPE_GC_ALLOC_H
18 #include <limits>
19 #include "gc-core.h"
21 namespace Inkscape {
23 namespace GC {
25 template <typename T, CollectionPolicy collect>
26 class Alloc {
27 public:
28 typedef T value_type;
29 typedef T *pointer;
30 typedef T const *const_pointer;
31 typedef T &reference;
32 typedef T const &const_reference;
33 typedef std::size_t size_type;
34 typedef std::ptrdiff_t difference_type;
36 template <typename U>
37 struct rebind { typedef Alloc<U, collect> other; };
39 Alloc() {}
40 template <typename U> Alloc(Alloc<U, collect> const &) {}
42 pointer address(reference r) { return &r; }
43 const_pointer address(const_reference r) { return &r; }
45 size_type max_size() const {
46 return std::numeric_limits<std::size_t>::max() / sizeof(T);
47 }
49 pointer allocate(size_type count, void const * =NULL) {
50 return static_cast<pointer>(::operator new(count * sizeof(T), SCANNED, collect));
51 }
53 void construct(pointer p, const_reference value) {
54 new (static_cast<void *>(p)) T(value);
55 }
56 void destroy(pointer p) { p->~T(); }
58 void deallocate(pointer p, size_type) { ::operator delete(p, GC); }
59 };
61 // allocators with the same collection policy are interchangable
63 template <typename T1, typename T2,
64 CollectionPolicy collect1, CollectionPolicy collect2>
65 bool operator==(Alloc<T1, collect1> const &, Alloc<T2, collect2> const &) {
66 return collect1 == collect2;
67 }
69 template <typename T1, typename T2,
70 CollectionPolicy collect1, CollectionPolicy collect2>
71 bool operator!=(Alloc<T1, collect1> const &, Alloc<T2, collect2> const &) {
72 return collect1 != collect2;
73 }
75 }
77 }
79 #endif
80 /*
81 Local Variables:
82 mode:c++
83 c-file-style:"stroustrup"
84 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
85 indent-tabs-mode:nil
86 fill-column:99
87 End:
88 */
89 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :