Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 70 insertions, 0 deletions

diff --git a/src/inkgc/gc-soft-ptr.h b/src/inkgc/gc-soft-ptr.h
new file mode 100644
index 0000000..b245d81
--- /dev/null
+++ b/src/inkgc/gc-soft-ptr.h
@@ -0,0 +1,70 @@
+// 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 :