hurd/port-cleanup.c

   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 }