mirror of
https://github.com/ThePhD/sol2.git
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106 lines
3.8 KiB
C++
106 lines
3.8 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2017 Rapptz, ThePhD and contributors
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef SOL_STATE_HPP
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#define SOL_STATE_HPP
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#include "state_view.hpp"
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#include "thread.hpp"
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namespace sol {
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namespace detail {
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inline int default_at_panic(lua_State* L) {
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#ifdef SOL_NO_EXCEPTIONS
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(void)L;
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return -1;
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#else
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size_t messagesize;
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const char* message = lua_tolstring(L, -1, &messagesize);
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if (message) {
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std::string err(message, messagesize);
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lua_settop(L, 0);
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throw error(err);
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}
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lua_settop(L, 0);
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throw error(std::string("An unexpected error occurred and forced the lua state to call atpanic"));
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#endif
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}
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inline int default_traceback_error_handler(lua_State* L) {
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using namespace sol;
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std::string msg = "An unknown error has triggered the default error handler";
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optional<string_view> maybetopmsg = stack::check_get<string_view>(L, 1);
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if (maybetopmsg) {
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const string_view& topmsg = maybetopmsg.value();
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msg.assign(topmsg.data(), topmsg.size());
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}
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luaL_traceback(L, L, msg.c_str(), 1);
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optional<string_view> maybetraceback = stack::check_get<string_view>(L, -1);
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if (maybetraceback) {
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const string_view& traceback = maybetraceback.value();
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msg.assign(traceback.data(), traceback.size());
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}
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return stack::push(L, msg);
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}
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} // namespace detail
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class state : private std::unique_ptr<lua_State, void (*)(lua_State*)>, public state_view {
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private:
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typedef std::unique_ptr<lua_State, void (*)(lua_State*)> unique_base;
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public:
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state(lua_CFunction panic = detail::default_at_panic)
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: unique_base(luaL_newstate(), lua_close), state_view(unique_base::get()) {
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set_panic(panic);
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lua_CFunction f = c_call<decltype(&detail::default_traceback_error_handler), &detail::default_traceback_error_handler>;
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protected_function::set_default_handler(object(lua_state(), in_place, f));
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stack::register_main_thread(unique_base::get());
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stack::luajit_exception_handler(unique_base::get());
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}
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state(lua_CFunction panic, lua_Alloc alfunc, void* alpointer = nullptr)
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: unique_base(lua_newstate(alfunc, alpointer), lua_close), state_view(unique_base::get()) {
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set_panic(panic);
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lua_CFunction f = c_call<decltype(&detail::default_traceback_error_handler), &detail::default_traceback_error_handler>;
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protected_function::set_default_handler(object(lua_state(), in_place, f));
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stack::register_main_thread(unique_base::get());
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stack::luajit_exception_handler(unique_base::get());
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}
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state(const state&) = delete;
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state(state&&) = default;
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state& operator=(const state&) = delete;
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state& operator=(state&& that) {
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state_view::operator=(std::move(that));
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unique_base::operator=(std::move(that));
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return *this;
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}
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using state_view::get;
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~state() {
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}
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};
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} // namespace sol
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#endif // SOL_STATE_HPP
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