1 /* Copyright (C) 1995-2012 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <http://www.gnu.org/licenses/>. */ 17 18 #ifndef _SYS_MSG_H 19 # error "Never use <bits/msq.h> directly; include <sys/msg.h> instead." 20 #endif 21 22 #include <bits/types.h> 23 24 /* Define options for message queue functions. */ 25 #define MSG_NOERROR 010000 /* no error if message is too big */ 26 #ifdef __USE_GNU 27 # define MSG_EXCEPT 020000 /* recv any msg except of specified type */ 28 #endif 29 30 /* Types used in the structure definition. */ 31 typedef __syscall_ulong_t msgqnum_t; 32 typedef __syscall_ulong_t msglen_t; 33 34 /* Structure of record for one message inside the kernel. 35 The type `struct msg' is opaque. */ 36 struct msqid_ds 37 { 38 struct ipc_perm msg_perm; /* structure describing operation permission */ 39 __time_t msg_stime; /* time of last msgsnd command */ 40 #ifndef __x86_64__ 41 unsigned long int __unused1; 42 #endif 43 __time_t msg_rtime; /* time of last msgrcv command */ 44 #ifndef __x86_64__ 45 unsigned long int __unused2; 46 #endif 47 __time_t msg_ctime; /* time of last change */ 48 #ifndef __x86_64__ 49 unsigned long int __unused3; 50 #endif 51 __syscall_ulong_t __msg_cbytes; /* current number of bytes on queue */ 52 msgqnum_t msg_qnum; /* number of messages currently on queue */ 53 msglen_t msg_qbytes; /* max number of bytes allowed on queue */ 54 __pid_t msg_lspid; /* pid of last msgsnd() */ 55 __pid_t msg_lrpid; /* pid of last msgrcv() */ 56 __syscall_ulong_t __unused4; 57 __syscall_ulong_t __unused5; 58 }; 59 60 #ifdef __USE_MISC 61 62 # define msg_cbytes __msg_cbytes 63 64 /* ipcs ctl commands */ 65 # define MSG_STAT 11 66 # define MSG_INFO 12 67 68 /* buffer for msgctl calls IPC_INFO, MSG_INFO */ 69 struct msginfo 70 { 71 int msgpool; 72 int msgmap; 73 int msgmax; 74 int msgmnb; 75 int msgmni; 76 int msgssz; 77 int msgtql; 78 unsigned short int msgseg; 79 }; 80 81 #endif /* __USE_MISC */ 82