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 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
