1  /* mlock -- guarantee pages are resident in memory.  Stub version.
       2     Copyright (C) 2001-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <sys/types.h>
      20  #include <sys/mman.h>
      21  #include <errno.h>
      22  
      23  /* Guarantee all whole pages mapped by the range [ADDR,ADDR+LEN) to
      24     be memory resident.  */
      25  
      26  int
      27  mlock (const void *addr, size_t len)
      28  {
      29    __set_errno (ENOSYS);
      30    return -1;
      31  }
      32  
      33  stub_warning (mlock)