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msq.h
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/* Copyright (C) 1995-2012 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 # error "Never use <bits/msq.h> directly; include <sys/msg.h> instead." #endif #include <bits/types.h> /* Define options for message queue functions. */ #define MSG_NOERROR 010000 /* no error if message is too big */ #ifdef __USE_GNU # define MSG_EXCEPT 020000 /* recv any msg except of specified type */ #endif /* Types used in the structure definition. */ typedef __syscall_ulong_t msgqnum_t; typedef __syscall_ulong_t msglen_t; /* 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 */ __time_t msg_stime; /* time of last msgsnd command */ #ifndef __x86_64__ unsigned long int __unused1; #endif __time_t msg_rtime; /* time of last msgrcv command */ #ifndef __x86_64__ unsigned long int __unused2; #endif __time_t msg_ctime; /* time of last change */ #ifndef __x86_64__ unsigned long int __unused3; #endif __syscall_ulong_t __msg_cbytes; /* current number of bytes on queue */ msgqnum_t msg_qnum; /* number of messages currently on queue */ msglen_t msg_qbytes; /* max number of bytes allowed on queue */ __pid_t msg_lspid; /* pid of last msgsnd() */ __pid_t msg_lrpid; /* pid of last msgrcv() */ __syscall_ulong_t __unused4; __syscall_ulong_t __unused5; }; #ifdef __USE_MISC # define msg_cbytes __msg_cbytes /* ipcs ctl commands */ # define MSG_STAT 11 # define MSG_INFO 12 # define MSG_STAT_ANY 13 /* 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 */