| /* Copyright (C) 1995-2014 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SYS_MSG_H |
| #define _SYS_MSG_H |
| |
| #include <features.h> |
| |
| #define __need_size_t |
| #include <stddef.h> |
| |
| /* Get common definition of System V style IPC. */ |
| #include <sys/ipc.h> |
| |
| /* Get system dependent definition of `struct msqid_ds' and more. */ |
| #include <bits/msq.h> |
| |
| /* Define types required by the standard. */ |
| #define __need_time_t |
| #include <time.h> |
| |
| #ifndef __pid_t_defined |
| typedef __pid_t pid_t; |
| # define __pid_t_defined |
| #endif |
| |
| #ifndef __ssize_t_defined |
| typedef __ssize_t ssize_t; |
| # define __ssize_t_defined |
| #endif |
| |
| /* The following System V style IPC functions implement a message queue |
| system. The definition is found in XPG2. */ |
| |
| #ifdef __USE_GNU |
| /* Template for struct to be used as argument for `msgsnd' and `msgrcv'. */ |
| struct msgbuf |
| { |
| __syscall_slong_t mtype; /* type of received/sent message */ |
| char mtext[1]; /* text of the message */ |
| }; |
| #endif |
| |
| |
| __BEGIN_DECLS |
| |
| /* Message queue control operation. */ |
| extern int msgctl (int __msqid, int __cmd, struct msqid_ds *__buf) __THROW; |
| |
| /* Get messages queue. */ |
| extern int msgget (key_t __key, int __msgflg) __THROW; |
| |
| /* Receive message from message queue. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern ssize_t msgrcv (int __msqid, void *__msgp, size_t __msgsz, |
| long int __msgtyp, int __msgflg); |
| |
| /* Send message to message queue. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int msgsnd (int __msqid, const void *__msgp, size_t __msgsz, |
| int __msgflg); |
| |
| __END_DECLS |
| |
| #endif /* sys/msg.h */ |