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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
* Inkscape::GC::Alloc - GC-aware STL allocator
*//*
* Authors:
* see git history
* MenTaLguY <mental@rydia.net>
*
* Copyright (C) 2018 Authors
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef SEEN_INKSCAPE_GC_ALLOC_H
#define SEEN_INKSCAPE_GC_ALLOC_H
#include <limits>
#include <cstddef>
#include "inkgc/gc-core.h"
namespace Inkscape {
namespace GC {
template <typename T, CollectionPolicy collect>
class Alloc {
public:
typedef T value_type;
typedef T *pointer;
typedef T const *const_pointer;
typedef T &reference;
typedef T const &const_reference;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
template <typename U>
struct rebind { typedef Alloc<U, collect> other; };
Alloc() = default;
template <typename U> Alloc(Alloc<U, collect> const &) {}
pointer address(reference r) { return &r; }
const_pointer address(const_reference r) { return &r; }
size_type max_size() const {
return std::numeric_limits<std::size_t>::max() / sizeof(T);
}
pointer allocate(size_type count, void const * =nullptr) {
return static_cast<pointer>(::operator new(count * sizeof(T), SCANNED, collect));
}
void construct(pointer p, const_reference value) {
new (static_cast<void *>(p)) T(value);
}
void destroy(pointer p) { p->~T(); }
void deallocate(pointer p, size_type) { ::operator delete(p, GC); }
};
// allocators with the same collection policy are interchangeable
template <typename T1, typename T2,
CollectionPolicy collect1, CollectionPolicy collect2>
bool operator==(Alloc<T1, collect1> const &, Alloc<T2, collect2> const &) {
return collect1 == collect2;
}
template <typename T1, typename T2,
CollectionPolicy collect1, CollectionPolicy collect2>
bool operator!=(Alloc<T1, collect1> const &, Alloc<T2, collect2> const &) {
return collect1 != collect2;
}
}
}
#endif
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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