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- /* Checking macros for mq functions.
- Copyright (C) 2007 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
- #ifndef _FCNTL_H
- # error "Never include <bits/mqueue2.h> directly; use <mqueue.h> instead."
- #endif
-
- /* Check that calls to mq_open with O_CREAT set have an appropriate third and fourth
- parameter. */
- extern mqd_t mq_open (__const char *__name, int __oflag, ...)
- __THROW __nonnull ((1));
- extern mqd_t __mq_open_2 (__const char *__name, int __oflag) __nonnull ((1));
- extern mqd_t __REDIRECT (__mq_open_alias, (__const char *__name, int __oflag, ...),
- mq_open) __nonnull ((1));
- __errordecl (__mq_open_wrong_number_of_args,
- "mq_open can be called either with 2 or 4 arguments");
- __errordecl (__mq_open_missing_mode_and_attr,
- "mq_open with O_CREAT in second argument needs 4 arguments");
-
- __extern_always_inline mqd_t
- mq_open (__const char *__name, int __oflag, ...)
- {
- if (__va_arg_pack_len () != 0 && __va_arg_pack_len () != 2)
- __mq_open_wrong_number_of_args ();
-
- if (__builtin_constant_p (__oflag))
- {
- if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () == 0)
- {
- __mq_open_missing_mode_and_attr ();
- return __mq_open_2 (__name, __oflag);
- }
- return __mq_open_alias (__name, __oflag, __va_arg_pack ());
- }
-
- if (__va_arg_pack_len () == 0)
- return __mq_open_2 (__name, __oflag);
-
- return __mq_open_alias (__name, __oflag, __va_arg_pack ());
- }
-