c++ 与 lua协程调用

#include <stdio.h>
#include <string.h>
#include <lua.hpp>
#include <lauxlib.h>
#include <lualib.h>
#include <unistd.h>
static int add2(lua_State* L)
{
	printf("add2\n");
    double op1 = luaL_checknumber(L,1);
    double op2 = luaL_checknumber(L,2);
    lua_pushnumber(L,op1 + op2);
    return 1;
}

static int luayield(lua_State* L)
{
	printf("luayield\n");
    return lua_yield(L, 0);
}

static int sub2(lua_State* L)
{
	printf("sub2\n");
    double op1 = luaL_checknumber(L,1);
    double op2 = luaL_checknumber(L,2);
    lua_pushnumber(L,op1 - op2);
    return 1;
}

const char* testfunc = "print(\"luabg\") luayield() print(add2(1.0,2.0)) print(sub2(20.1,19)) luayield() print(\"end\")";

int main()
{
    lua_State* L = luaL_newstate();
    luaL_openlibs(L);
    lua_State* newL = lua_newthread(L);

	lua_register(newL, "luayield", luayield);
    lua_register(newL, "add2", add2);
    lua_register(newL, "sub2", sub2);
    if (luaL_loadstring(newL,testfunc))
	{
        printf("Failed to invoke.\n");
	}
	sleep(1);
	printf("resume bf\n");
	lua_resume(newL, 0);
	sleep(1);
	printf("resume end\n");
	lua_resume(newL, 0);
	sleep(1);
	lua_resume(newL, 0);
	lua_close(L);
    return 0;
}
/*
执行结果
resume bf
luabg
luayield 	//第一个lua_resume执行到这里
resume end
add2
3
sub2
1.1
luayield 	//第二个lua_resume执行到这里
end 		//第三个lua_resume执行到这里

*/

编译命令

g++ -o a.out test.c -llua