/* Copyright (C) 1995, 1996, 1997 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _SYS_MSG_H # error "Never use <bits/msq.h> directly; include <sys/msg.h> instead." #endif #include <sys/types.h> /* Define options for message queue functions. */ #define MSG_NOERROR 010000 /* no error if message is too big */ #define MSG_EXCEPT 020000 /* recv any msg except of specified type */ /* Structure of record for one message inside the kernel. The type `struct msg' is opaque. */ struct msqid_ds { struct ipc_perm msg_perm; /* structure describing operation permission */ struct msg *__msg_first; /* pointer to first message on queue */ struct msg *__msg_last; /* pointer to last message on queue */ __time_t msg_stime; /* time of last msgsnd command */ __time_t msg_rtime; /* time of last msgrcv command */ __time_t msg_ctime; /* time of last change */ struct wait_queue *__wwait; /* ??? */ struct wait_queue *__rwait; /* ??? */ unsigned short int __msg_cbytes;/* current number of bytes on queue */ unsigned short int msg_qnum; /* number of messages currently on queue */ unsigned short int msg_qbytes;/* max number of bytes allowed on queue */ __ipc_pid_t msg_lspid; /* pid of last msgsnd() */ __ipc_pid_t msg_lrpid; /* pid of last msgrcv() */ }; #ifdef __USE_MISC # define msg_cbytes __msg_cbytes /* ipcs ctl commands */ # define MSG_STAT 11 # define MSG_INFO 12 /* buffer for msgctl calls IPC_INFO, MSG_INFO */ struct msginfo { int msgpool; int msgmap; int msgmax; int msgmnb; int msgmni; int msgssz; int msgtql; unsigned short int msgseg; }; #endif /* __USE_MISC */