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// The MIT License (MIT)
// Copyright (c) 2013-2016 Rapptz, ThePhD and contributors
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SOL_THREAD_HPP
#define SOL_THREAD_HPP
#include "reference.hpp"
#include "stack.hpp"
namespace sol {
struct lua_thread_state {
lua_State* L;
operator lua_State* () const {
return L;
}
lua_State* operator-> () const {
return L;
}
};
namespace stack {
template <>
struct pusher<lua_thread_state> {
int push(lua_State*, lua_thread_state lts) {
lua_pushthread(lts.L);
return 1;
}
};
template <>
struct getter<lua_thread_state> {
lua_thread_state get(lua_State* L, int index, record& tracking) {
tracking.use(1);
lua_thread_state lts{ lua_tothread(L, index) };
return lts;
}
};
template <>
struct check_getter<lua_thread_state> {
template <typename Handler>
optional<lua_thread_state> get(lua_State* L, int index, Handler&& handler, record& tracking) {
lua_thread_state lts{ lua_tothread(L, index) };
if (lts.L == nullptr) {
handler(L, index, type::thread, type_of(L, index));
return nullopt;
}
tracking.use(1);
return lts;
}
};
}
#if SOL_LUA_VERSION < 502
inline lua_State* main_thread(lua_State*, lua_State* backup_if_unsupported = nullptr) {
return backup_if_unsupported;
}
#else
inline lua_State* main_thread(lua_State* L, lua_State* = nullptr) {
lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_MAINTHREAD);
lua_thread_state s = stack::pop<lua_thread_state>(L);
return s.L;
}
#endif // Lua 5.2+ has the main thread getter
class thread : public reference {
public:
thread() noexcept = default;
thread(const thread&) = default;
thread(thread&&) = default;
template <typename T, meta::enable<meta::neg<std::is_same<meta::unqualified_t<T>, thread>>, std::is_base_of<reference, meta::unqualified_t<T>>> = meta::enabler>
thread(T&& r) : reference(std::forward<T>(r)) {}
thread(const stack_reference& r) : thread(r.lua_state(), r.stack_index()) {};
thread(stack_reference&& r) : thread(r.lua_state(), r.stack_index()) {};
thread& operator=(const thread&) = default;
thread& operator=(thread&&) = default;
template <typename T, meta::enable<meta::neg<std::is_integral<meta::unqualified_t<T>>>, meta::neg<std::is_same<T, ref_index>>> = meta::enabler>
thread(lua_State* L, T&& r) : thread(L, sol::ref_index(r.registry_index())) {}
thread(lua_State* L, int index = -1) : reference(L, index) {
#ifdef SOL_CHECK_ARGUMENTS
type_assert(L, index, type::thread);
#endif // Safety
}
thread(lua_State* L, ref_index index) : reference(L, index) {
#ifdef SOL_CHECK_ARGUMENTS
auto pp = stack::push_pop(*this);
type_assert(L, -1, type::thread);
#endif // Safety
}
thread(lua_State* L, lua_State* actualthread) : thread(L, lua_thread_state{ actualthread }) {}
thread(lua_State* L, sol::this_state actualthread) : thread(L, lua_thread_state{ actualthread.L }) {}
thread(lua_State* L, lua_thread_state actualthread) : reference(L, -stack::push(L, actualthread)) {
#ifdef SOL_CHECK_ARGUMENTS
type_assert(L, -1, type::thread);
#endif // Safety
lua_pop(L, 1);
}
state_view state() const {
return state_view(this->thread_state());
}
bool is_main_thread() const {
int ismainthread = lua_pushthread(this->thread_state());
lua_pop(this->thread_state(), 1);
return ismainthread == 1;
}
lua_State* thread_state() const {
auto pp = stack::push_pop(*this);
lua_State* lthread = lua_tothread(lua_state(), -1);
return lthread;
}
thread_status status() const {
lua_State* lthread = thread_state();
thread_status lstat = static_cast<thread_status>(lua_status(lthread));
if (lstat != thread_status::ok && lua_gettop(lthread) == 0) {
// No thing on the thread's stack means its dead
return thread_status::dead;
}
return lstat;
}
thread create() {
return create(lua_state());
}
static thread create(lua_State* L) {
lua_newthread(L);
thread result(L);
lua_pop(L, 1);
return result;
}
};
} // sol
#endif // SOL_THREAD_HPP
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