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#define SOL_ALL_SAFETIES_ON 1
#include <sol/sol.hpp>
#include <iostream>
int main(int, char*[]) {
std::cout << "=== coroutine state transfer ==="
<< std::endl;
sol::state lua;
lua.open_libraries();
sol::function transferred_into;
lua["f"] = [&lua, &transferred_into](
sol::object t, sol::this_state this_L) {
std::cout << "state of main : "
<< (void*)lua.lua_state() << std::endl;
std::cout << "state of function : "
<< (void*)this_L.lua_state() << std::endl;
// pass original lua_State* (or
// sol::state/sol::state_view) transfers ownership from
// the state of "t", to the "lua" sol::state
transferred_into = sol::function(lua, t);
};
lua.script(R"(
i = 0
function test()
co = coroutine.create(
function()
local g = function() i = i + 1 end
f(g)
g = nil
collectgarbage()
end
)
coroutine.resume(co)
co = nil
collectgarbage()
end
)");
// give it a try
lua.safe_script("test()");
// should call 'g' from main thread, increment i by 1
transferred_into();
// check
int i = lua["i"];
SOL_ASSERT(i == 1);
std::cout << std::endl;
return 0;
}
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