Function ccall

3rd/lua-5.4.3/src/ldo.c:570–580

** Call a function (C or Lua) through C. 'inc' can be 1 (increment ** number of recursive invocations in the C stack) or nyci (the same ** plus increment number of non-yieldable calls). */

** plus increment number of non-yieldable calls).
*/
static void ccall (lua_State *L, StkId func, int nResults, int inc) {
  CallInfo *ci;
  L->nCcalls += inc;
  if (l_unlikely(getCcalls(L) >= LUAI_MAXCCALLS))
    luaE_checkcstack(L);
  if ((ci = luaD_precall(L, func, nResults)) != NULL) {  /* Lua function? */
    ci->callstatus = CIST_FRESH;  /* mark that it is a "fresh" execute */
    luaV_execute(L, ci);  /* call it */
  }
  L->nCcalls -= inc;
}


/*