1  /* Cleanup function for `struct hurd_port' users.
       2     Copyright (C) 1995-2023 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 <mach.h>
      20  #include <hurd/port.h>
      21  
      22  /* The last user of the send right CLEANUP_DATA is now doing
      23     `longjmp (ENV, VAL)', and this will unwind the frame of
      24     that last user.  Deallocate the right he will never get back to using.  */
      25  
      26  void
      27  _hurd_port_cleanup (void *cleanup_data, jmp_buf env, int val)
      28  {
      29    mach_port_t port = (mach_port_t) (uintptr_t) cleanup_data;
      30    __mach_port_deallocate (__mach_task_self (), port);
      31  }
      32  
      33  /* We were cancelled while using a port, and called from the cleanup unwinding.
      34   */
      35  
      36  void
      37  _hurd_port_use_cleanup (void *arg)
      38  {
      39    struct _hurd_port_use_data *data = arg;
      40  
      41    _hurd_port_free (data->p, &data->link, data->port);
      42  }