1 /* Checking macros for mq functions. 2 Copyright (C) 2007, 2011 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) 29 __THROW __nonnull ((1)); 30 extern mqd_t __REDIRECT_NTH (__mq_open_alias, (__const char *__name, 31 int __oflag, ...), mq_open) 32 __nonnull ((1)); 33 __errordecl (__mq_open_wrong_number_of_args, 34 "mq_open can be called either with 2 or 4 arguments"); 35 __errordecl (__mq_open_missing_mode_and_attr, 36 "mq_open with O_CREAT in second argument needs 4 arguments"); 37 38 __extern_always_inline mqd_t 39 __NTH (mq_open (__const char *__name, int __oflag, ...)) 40 { 41 if (__va_arg_pack_len () != 0 && __va_arg_pack_len () != 2) 42 __mq_open_wrong_number_of_args (); 43 44 if (__builtin_constant_p (__oflag)) 45 { 46 if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () == 0) 47 { 48 __mq_open_missing_mode_and_attr (); 49 return __mq_open_2 (__name, __oflag); 50 } 51 return __mq_open_alias (__name, __oflag, __va_arg_pack ()); 52 } 53 54 if (__va_arg_pack_len () == 0) 55 return __mq_open_2 (__name, __oflag); 56 57 return __mq_open_alias (__name, __oflag, __va_arg_pack ()); 58 } 59
