Lua coroutines and C++

最新推荐文章于 2025-04-11 16:25:14 发布

linuxheik

最新推荐文章于 2025-04-11 16:25:14 发布

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本文介绍了一个使用Lua协程与C++进行交互的例子。通过一个简单的计数器程序展示了如何从C++中创建并控制Lua线程，以及如何在两者间传递数据。

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Lua coroutines and C++

Posted on November 21, 2010 by kristianr

Tonight I played around with coroutines in Lua. After some Googling I figured out how to create and communicate with a Lua-thread from C++. It turned out to be really simple.

The lua program “loop.lua”

 
         counter = 
         0
        
         function 
          loop()
        
         while 
          counter
        
         do
        
         print("Sending " .. counter);
        
         coroutine
         .
         yield(counter);
        
         counter = counter + 
         1
         ;
        
         end
        
         end

The C++ program

 
         #include <stdio.h>
        
         extern 
          "C" 
          {
        
         #include "lua.h"
        
         #include "lualib.h"
        
         #include "lauxlib.h"
        
         }
        
         int 
          main (
         void
         )
        
         {
        
         lua_State *L = lua_open();
        
         luaL_openlibs(L);
        
         if 
          (!luaL_loadfile(L, 
         "loop.lua"
         )) {
        
         lua_pcall(L, 0, 0, 0);
        
         lua_State *L2 = lua_newthread(L);
        
         lua_getglobal(L2, 
         "loop"
         );
        
         while 
          (1) {
        
         puts
         (
         "while top"
         );
        
         int 
          res = lua_resume(L2, 0);
        
         if 
          (res != 0) {
        
         break
         ;
        
         }
        
         if 
          (lua_isnumber(L2, lua_gettop(L2)) == 1) {
        
         printf
         (
        
         "Got %d\n"
         ,
        
         lua_tonumber(L2, lua_gettop(L2))
        
         );
        
         }
        
         }
        
         }
        
         lua_close(L);
        
         return 
          0;
        
         }