1 /* Copyright 2017-2021 PaGMO development team 2 3 This file is part of the PaGMO library. 4 5 The PaGMO library is free software; you can redistribute it and/or modify 6 it under the terms of either: 7 8 * the GNU Lesser General Public License as published by the Free 9 Software Foundation; either version 3 of the License, or (at your 10 option) any later version. 11 12 or 13 14 * the GNU General Public License as published by the Free Software 15 Foundation; either version 3 of the License, or (at your option) any 16 later version. 17 18 or both in parallel, as here. 19 20 The PaGMO library is distributed in the hope that it will be useful, but 21 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 22 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 23 for more details. 24 25 You should have received copies of the GNU General Public License and the 26 GNU Lesser General Public License along with the PaGMO library. If not, 27 see https://www.gnu.org/licenses/. */ 28 29 #ifndef PAGMO_DETAIL_GTE_GETTER_HPP 30 #define PAGMO_DETAIL_GTE_GETTER_HPP 31 32 #include <functional> 33 34 #include <boost/any.hpp> 35 36 #include <pagmo/detail/visibility.hpp> 37 38 namespace pagmo 39 { 40 41 namespace detail 42 { 43 44 // NOTE: in some cases, we need to call into Python 45 // from a thread created within C++ (e.g., the island thread). 46 // This function will return a RAII-style object that 47 // can be used to ensure that we can safely call into Python 48 // from the external thread. When working in C++, this 49 // functor will return an empty object with no side 50 // effects. 51 PAGMO_DLL_PUBLIC extern std::function<boost::any()> gte_getter; 52 53 } // namespace detail 54 55 } // namespace pagmo 56 57 #endif 58