1 /* Checking macros for mq functions.
2 Copyright (C) 2007 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, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
19
20 #ifndef _FCNTL_H
21 # error "Never include <bits/mqueue2.h> directly; use <mqueue.h> instead."
22 #endif
23
24 /* Check that calls to mq_open with O_CREAT set have an appropriate third and fourth
25 parameter. */
26 extern mqd_t mq_open (__const char *__name, int __oflag, ...)
27 __THROW __nonnull ((1));
28 extern mqd_t __mq_open_2 (__const char *__name, int __oflag) __nonnull ((1));
29 extern mqd_t __REDIRECT (__mq_open_alias, (__const char *__name, int __oflag, ...),
30 mq_open) __nonnull ((1));
31 __errordecl (__mq_open_wrong_number_of_args,
32 "mq_open can be called either with 2 or 4 arguments");
33 __errordecl (__mq_open_missing_mode_and_attr,
34 "mq_open with O_CREAT in second argument needs 4 arguments");
35
36 __extern_always_inline mqd_t
mq_open(__const char * __name,int __oflag,...)37 mq_open (__const char *__name, int __oflag, ...)
38 {
39 if (__va_arg_pack_len () != 0 && __va_arg_pack_len () != 2)
40 __mq_open_wrong_number_of_args ();
41
42 if (__builtin_constant_p (__oflag))
43 {
44 if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () == 0)
45 {
46 __mq_open_missing_mode_and_attr ();
47 return __mq_open_2 (__name, __oflag);
48 }
49 return __mq_open_alias (__name, __oflag, __va_arg_pack ());
50 }
51
52 if (__va_arg_pack_len () == 0)
53 return __mq_open_2 (__name, __oflag);
54
55 return __mq_open_alias (__name, __oflag, __va_arg_pack ());
56 }
57