Function gctm

3rd/lua-5.4.3/src/loadlib.c:363–371

** __gc tag method for CLIBS table: calls 'lsys_unloadlib' for all lib ** handles in list CLIBS */

** handles in list CLIBS
*/
static int gctm (lua_State *L) {
  lua_Integer n = luaL_len(L, 1);
  for (; n >= 1; n--) {  /* for each handle, in reverse order */
    lua_rawgeti(L, 1, n);  /* get handle CLIBS[n] */
    lsys_unloadlib(lua_touserdata(L, -1));
    lua_pop(L, 1);  /* pop handle */
  }
  return 0;
}