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-rw-r--r--src/inkgc/gc-soft-ptr.h70
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diff --git a/src/inkgc/gc-soft-ptr.h b/src/inkgc/gc-soft-ptr.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * 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_SOFT_PTR_H
+#define SEEN_INKSCAPE_GC_SOFT_PTR_H
+
+#include "inkgc/gc-core.h"
+
+namespace Inkscape {
+
+namespace GC {
+
+/**
+ * A class for pointers which can be automatically cleared to break
+ * finalization cycles.
+ */
+template <typename T>
+class soft_ptr {
+public:
+ soft_ptr(T *pointer=nullptr) : _pointer(pointer) {
+ _register();
+ }
+
+ operator T *() const { return static_cast<T *>(_pointer); }
+ T &operator*() const { return *static_cast<T *>(_pointer); }
+ T *operator->() const { return static_cast<T *>(_pointer); }
+ T &operator[](int i) const { return static_cast<T *>(_pointer)[i]; }
+
+ soft_ptr &operator=(T *pointer) {
+ _pointer = pointer;
+ return *this;
+ }
+
+ // default copy
+
+private:
+ void _register() {
+ void *base=Core::base(this);
+ if (base) {
+ Core::general_register_disappearing_link(&_pointer, base);
+ }
+ }
+
+ void *_pointer;
+};
+
+}
+
+}
+
+#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 :