1 // Copyright (c) 2003 Daniel Wallin and Arvid Norberg 2 3 // Permission is hereby granted, free of charge, to any person obtaining a 4 // copy of this software and associated documentation files (the "Software"), 5 // to deal in the Software without restriction, including without limitation 6 // the rights to use, copy, modify, merge, publish, distribute, sublicense, 7 // and/or sell copies of the Software, and to permit persons to whom the 8 // Software is furnished to do so, subject to the following conditions: 9 10 // The above copyright notice and this permission notice shall be included 11 // in all copies or substantial portions of the Software. 12 13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF 14 // ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 15 // TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 16 // PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT 17 // SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR 18 // ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 19 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE 21 // OR OTHER DEALINGS IN THE SOFTWARE. 22 23 24 #ifndef LUABIND_YIELD_POLICY_HPP_INCLUDED 25 #define LUABIND_YIELD_POLICY_HPP_INCLUDED 26 27 #include <luabind/config.hpp> 28 #include <luabind/detail/policy.hpp> 29 30 namespace luabind { namespace detail 31 { 32 struct yield_policy 33 { precallluabind::detail::yield_policy34 static void precall(lua_State*, const index_map&) {} postcallluabind::detail::yield_policy35 static void postcall(lua_State*, const index_map&) {} 36 }; 37 38 template<class T> 39 struct has_yield 40 { 41 BOOST_STATIC_CONSTANT(bool, 42 value = (boost::is_same<yield_policy, typename T::head>::value || 43 has_yield<typename T::tail>::value)); 44 }; 45 46 template<> 47 struct has_yield<null_type> 48 { 49 BOOST_STATIC_CONSTANT(bool, value = false); 50 }; 51 }} 52 53 namespace luabind 54 { 55 detail::policy_cons<detail::yield_policy, detail::null_type> const yield = {}; 56 57 namespace detail 58 { ignore_unused_yield()59 inline void ignore_unused_yield() 60 { 61 (void)yield; 62 } 63 } 64 } 65 66 #endif // LUABIND_YIELD_POLICY_HPP_INCLUDED 67 68