mach/mig-reply.c

   1 /* Copyright (C) 1992-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <mach.h>
  19
  20 /* These functions are called by MiG-generated code.  */
  21
  22 static mach_port_t reply_port;
  23
  24 /* Called by MiG to get a reply port.  */
  25 mach_port_t
  26 __mig_get_reply_port (void)
  27 {
  28   if (reply_port == MACH_PORT_NULL)
  29     reply_port = __mach_reply_port ();
  30
  31   return reply_port;
  32 }
  33
  34 /* Called by MiG to deallocate the reply port.  */
  35 void
  36 __mig_dealloc_reply_port (void)
  37 {
  38   mach_port_t port = reply_port;
  39   reply_port = MACH_PORT_NULL;  /* So the mod_refs RPC won't use it.  */
  40   __mach_port_mod_refs (__mach_task_self (), port,
  41                         MACH_PORT_RIGHT_RECEIVE, -1);
  42 }
  43
  44
  45 /* Called at startup with CPROC == NULL.  cthreads has a different version
  46    of this function that is sometimes called with a `cproc_t' pointer.  */
  47 void
  48 __mig_init (void *cproc)
  49 {
  50   if (cproc == 0)
  51     reply_port = MACH_PORT_NULL;
  52 }