Can't lua_resume after async_wait? - c++

Question

I have some lua script that have some long running task like getting a web page so I make it yield then the C code handle get page job async, so the thread free to do other job and after a specify time it check back to see is the get page job finished , if so then resume the script. the problem is the thread can't resume the job after async wait.
here is my code I riped it from a class so a little messy sorry
////script:
function Loginmegaupload_com(hp, user, pass, cookie)
setURL(hp, "http://megaupload.com/?c=login")
importPost(hp, "login=1&redir=1")
addPost(hp, "username", user)
addPost(hp, "password", pass)
GetPage()
if isHeaderContain(hp, "user=") ~= nil then
SetFileLink(cookie, GetAllCookie(hp))
return 1
else
return 0
end
end
////c code
int FileSharingService::GetPage(lua_State *ls)
{
return lua_yield(ls, 0);
}
void FileSharingService::AsyncWait(Http_RequestEx *Http, lua_State *LS, boost::asio::deadline_timer* Timer)
{
if( (Http->status_code == Http_RequestEx::ERROR) || (Http->status_code == Http_RequestEx::FISNISHED))
{
if(Http->status_code == Http_RequestEx::FISNISHED)
{
int result = lua_resume(LS, 0); // here I got result == 2 mean error ?
if(result == 0)//lua script exit normal, resume success
{
delete Http;
delete Timer;
}
}
else
return;
}
else
{
Timer->expires_from_now(boost::posix_time::milliseconds(200));
Timer->async_wait(boost::bind(&FileSharingService::AsyncWait, this, Http, LS, Timer));
}
}
bool FileSharingService::Login(string URL, string User, string Pass, string &Cookie)
{
Http_RequestEx *http = new Http_RequestEx;
http->url = URL;
LuaWarper* Lua = Lua_map[boost::this_thread::get_id()]; //one main luaState per ioservice thread
lua_State *thread = lua_newthread(Lua->GetState());
boost::asio::deadline_timer *timer = new boost::asio::deadline_timer(*HClient.ioservice);
string functioname = "Login" + GetServicename(URL);
if( Lua->isFunctionAvaliable(functioname.c_str()) == false )
{
throw(FileSharingService::SERVICE_NOT_AVALIABLE);
}
else
{
lua_getglobal(thread, functioname.c_str());
lua_pushlightuserdata(thread, http);
lua_pushstring(thread, User.c_str());
lua_pushstring(thread, Pass.c_str());
lua_pushlightuserdata(thread, &Cookie);
int result = lua_resume(thread, 4);
if(result == LUA_YIELD)
{
HClient.Do(*http, false);
AsyncWait(http, thread, timer);
}
else if(result == 0)
{
//fisnished at first call
}
else
{
//yield error, will handle late
}
}
}

Answer 1

Sorry never mind this question, lua_resume return 2 mean error but script work just fine, asio get page work fine too, and I tracked down the line that respond for fail of lua_resume :
httpinfo.header.append(buffer, (HeaderEndIndex-buffer+2) );
if I comment that line lua_resume work as expected it return 0 mean script exit, this line don't do any thing that can affect the lua thread state it just a string assign, I checked there no overflow. so weird.