1  /* Macros for handling Mach RPC messages.
       2     Copyright (C) 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/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; uint32_t w; } _t, _c;	\
      24    _t.t = *(type); _c.t = *(check);_t.w != _c.w; }))
      25  
      26  /* TODO: add this assertion for x86_64.  */
      27  #ifndef __x86_64__
      28  _Static_assert (sizeof (uint32_t) == sizeof (mach_msg_type_t),
      29                  "mach_msg_type_t needs to be the same size as uint32_t");
      30  #endif