sysdeps/mach/mach_rpc.h

   1 /* Macros for handling Mach RPC messages.
   2    Copyright (C) 2023-2024 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/message.h>
  20
  21 /* Macro used by MIG to cleanly check the type.  */
  22 #define BAD_TYPECHECK(type, check) __glibc_unlikely (({ \
  23   union { mach_msg_type_t t; uintptr_t w; } _t, _c;     \
  24   _t.t = *(type); _c.t = *(check);_t.w != _c.w; }))
  25
  26 _Static_assert (sizeof (uintptr_t) == sizeof (mach_msg_type_t),
  27                 "mach_msg_type_t needs to be the same size as uintptr_t");