Function lua_yield

Source/Misc/lua/src/lua.c:5589–5598

LUA_API int lua_yield (lua_State *L, int nresults) {
luai_userstateyield(L, nresults);
lua_lock(L);
if (L->nCcalls > L->baseCcalls)
luaG_runerror(L, "attempt to yield across metamethod/C-call boundary");
L->base = L->top - nresults;  /* protect stack slots below */
L->status = LUA_YIELD;
lua_unlock(L);
return -1;
}


int luaD_pcall (lua_State *L, Pfunc func, void *u,