--- /dev/null
+/*
+ Copyright (C) 2024 Carl Hetherington <cth@carlh.net>
+
+ This file is part of libdcp.
+
+ libdcp is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ libdcp is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with libdcp. If not, see <http://www.gnu.org/licenses/>.
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of portions of this program with the
+ OpenSSL library under certain conditions as described in each
+ individual source file, and distribute linked combinations
+ including the two.
+
+ You must obey the GNU General Public License in all respects
+ for all of the code used other than OpenSSL. If you modify
+ file(s) with this exception, you may extend this exception to your
+ version of the file(s), but you are not obligated to do so. If you
+ do not wish to do so, delete this exception statement from your
+ version. If you delete this exception statement from all source
+ files in the program, then also delete it here.
+*/
+
+
+#ifndef LIBDCP_SCOPE_GUARD_H
+#define LIBDCP_SCOPE_GUARD_H
+
+
+#include <functional>
+
+
+namespace dcp {
+
+
+class ScopeGuard
+{
+public:
+ template <typename F>
+ ScopeGuard(F const& function)
+ : _function(function)
+ {}
+
+ ScopeGuard(ScopeGuard&& other)
+ : _function(std::move(other._function))
+ {
+ other._function = []{};
+ }
+
+ ScopeGuard(ScopeGuard const&) = delete;
+ ScopeGuard& operator=(ScopeGuard const&) = delete;
+
+ ~ScopeGuard()
+ {
+ _function();
+ }
+
+private:
+ std::function<void()> _function;
+};
+
+
+}
+
+
+#endif
+
--- /dev/null
+/*
+ Copyright (C) 2015-2021 Carl Hetherington <cth@carlh.net>
+
+ This file is part of libdcp.
+
+ libdcp is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ libdcp is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with libdcp. If not, see <http://www.gnu.org/licenses/>.
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of portions of this program with the
+ OpenSSL library under certain conditions as described in each
+ individual source file, and distribute linked combinations
+ including the two.
+
+ You must obey the GNU General Public License in all respects
+ for all of the code used other than OpenSSL. If you modify
+ file(s) with this exception, you may extend this exception to your
+ version of the file(s), but you are not obligated to do so. If you
+ do not wish to do so, delete this exception statement from your
+ version. If you delete this exception statement from all source
+ files in the program, then also delete it here.
+*/
+
+
+#include "scope_guard.h"
+#include <boost/test/unit_test.hpp>
+
+
+BOOST_AUTO_TEST_CASE(scope_guard_test)
+{
+ int x = 0;
+
+ {
+ dcp::ScopeGuard sg = [&x]() { x = 42; };
+ BOOST_CHECK_EQUAL (x, 0);
+ }
+
+ BOOST_CHECK_EQUAL (x, 42);
+}