Re: Use lua_State as local variable in C function call, but not to load instructions each time

[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index]

• Subject: Re: Use lua_State as local variable in C function call, but not to load instructions each time
• From: Asko Kauppi <askok@...>
• Date: Sat, 2 Jun 2007 19:34:10 +0300

---

You can of course use precompiled scripts, but even then setting up the Lua state will take some time & code. An approach I've used in Lua Lanes is to have forever-looping server threads, who exchange data over receive/send connection with others. In fact, Lanes has grown now to a fairly OS-kernel-like set of features (threads ~ processes), which indeed is a part of my vision of a "virtual" operating system. But maybe my "answer" is more than you were asking. What you'd want (imho) is ability to 'clone' the template lua_State after loading 'test.lua', and then be able to close those clones after usage. Maybe you can twist 'lua_newthread()' to do this?

Good luck. :)
-asko
Huang Lin kirjoitti 2.6.2007 kello 18:23:

Hi there,
I use lua in this way in my C program.
int getPrompt (char* output)
{
 lua_State *L = lua_open(); /* create state */
 if (luaL_loadfile(L, "test.lua") || lua_pcall(L, 0, 0, 0))
 {
 }
 /// other lua logic to get output
 lua_close(L);
}

By using a local lua_State, the C program can begin the LUA logic from a fresh environment. This is also helpful when the C function, getPrompt, was run in multithread environment that doesn't require LUA related data to be shared/exchanged between threads. But it is expensive to load the LUA instructions each time when I just want a local and fresh LUA runtime environment. Is it possible to load/compile the LUA scripts once, put the result in the memory, and let the local lua_State(an independent lua universes) use it?

Thanks,
Huang Lin

---

• Follow-Ups:
  • 回复： Re: Use lua_State as local variable in C function call, but not to load instructions each time, Huang Lin

• References:
  • Use lua_State as local variable in C function call, but not to load instructions each time, Huang Lin

• Prev by Date: Use lua_State as local variable in C function call, but not to load instructions each time
• Next by Date: Re: Apparent modulo error
• Previous by thread: Use lua_State as local variable in C function call, but not to load instructions each time
• Next by thread: 回复： Re: Use lua_State as local variable in C function call, but not to load instructions each time
• Index(es):
  • Date
  • Thread