diff --git a/opm/core/utility/share_obj.hpp b/opm/core/utility/share_obj.hpp new file mode 100644 index 000000000..2509bff74 --- /dev/null +++ b/opm/core/utility/share_obj.hpp @@ -0,0 +1,49 @@ +/* + Copyright (c) 2013 Uni Research AS + + This file is part of the Open Porous Media project (OPM). + + OPM 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 3 of the License, or + (at your option) any later version. + + OPM 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 OPM. If not, see . +*/ + +#ifndef OPM_SHARE_OBJ_HPP +#define OPM_SHARE_OBJ_HPP + +#include // shared_ptr + +namespace Opm { + +/// Custom deleter that does nothing +inline void no_delete (void const *) { } + +/*! + * Share pointer of a local object. + * + * Use this wrapper when an interface needs a shared_ptr, but you + * want to pass an object that has local storage (and you know + * that the shared_ptr client doesn't need it outside of the scope). + * + * \example + * \code{.cpp} + * Foo obj; + * std::shared_ptr ptr = share_obj (obj); + * \endcode + */ +template std::shared_ptr share_obj (T& t) { + return std::shared_ptr (&t, no_delete); +} + +} // namespace Opm + +#endif /* OPM_SHARE_OBJ_HPP */