1 /* Copyright (C) 1995, 1996, 1997, 2000 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, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19 #ifndef _SYS_MSG_H 20 # error "Never use <bits/msq.h> directly; include <sys/msg.h> instead." 21 #endif 22 23 #include <bits/types.h> 24 25 /* Define options for message queue functions. */ 26 #define MSG_NOERROR 010000 /* no error if message is too big */ 27 #ifdef __USE_GNU 28 # define MSG_EXCEPT 020000 /* recv any msg except of specified type */ 29 #endif 30 31 /* Types used in the structure definition. */ 32 typedef unsigned long int msgqnum_t; 33 typedef unsigned long int msglen_t; 34 35 36 /* Structure of record for one message inside the kernel. 37 The type `struct msg' is opaque. */ 38 struct msqid_ds 39 { 40 struct ipc_perm msg_perm; /* structure describing operation permission */ 41 __time_t msg_stime; /* time of last msgsnd command */ 42 unsigned long int __unused1; 43 __time_t msg_rtime; /* time of last msgrcv command */ 44 unsigned long int __unused2; 45 __time_t msg_ctime; /* time of last change */ 46 unsigned long int __unused3; 47 unsigned long int __msg_cbytes; /* current number of bytes on queue */ 48 msgqnum_t msg_qnum; /* number of messages currently on queue */ 49 msglen_t msg_qbytes; /* max number of bytes allowed on queue */ 50 __pid_t msg_lspid; /* pid of last msgsnd() */ 51 __pid_t msg_lrpid; /* pid of last msgrcv() */ 52 unsigned long int __unused4; 53 unsigned long int __unused5; 54 }; 55 56 #ifdef __USE_MISC 57 58 # define msg_cbytes __msg_cbytes 59 60 /* ipcs ctl commands */ 61 # define MSG_STAT 11 62 # define MSG_INFO 12 63 64 /* buffer for msgctl calls IPC_INFO, MSG_INFO */ 65 struct msginfo 66 { 67 int msgpool; 68 int msgmap; 69 int msgmax; 70 int msgmnb; 71 int msgmni; 72 int msgssz; 73 int msgtql; 74 unsigned short int msgseg; 75 }; 76 77 #endif /* __USE_MISC */ 78
