glibc/sysdeps/mach/mach_rpc.h

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/* Macros for handling Mach RPC messages.
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <mach/message.h>
/* Macro used by MIG to cleanly check the type. */
#define BAD_TYPECHECK(type, check) __glibc_unlikely (({ \
union { mach_msg_type_t t; uintptr_t w; } _t, _c; \
_t.t = *(type); _c.t = *(check);_t.w != _c.w; }))
_Static_assert (sizeof (uintptr_t) == sizeof (mach_msg_type_t),
"mach_msg_type_t needs to be the same size as uintptr_t");