1 /* Copyright (C) 1995, 1996, 1997, 2000, 2002 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 #include <bits/wordsize.h> 25 26 /* Define options for message queue functions. */ 27 #define MSG_NOERROR 010000 /* no error if message is too big */ 28 #ifdef __USE_GNU 29 # define MSG_EXCEPT 020000 /* recv any msg except of specified type */ 30 #endif 31 32 /* Types used in the structure definition. */ 33 typedef unsigned long int msgqnum_t; 34 typedef unsigned long int msglen_t; 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 #if __WORDSIZE == 32 43 unsigned long int __unused1; 44 #endif 45 __time_t msg_rtime; /* time of last msgrcv command */ 46 #if __WORDSIZE == 32 47 unsigned long int __unused2; 48 #endif 49 __time_t msg_ctime; /* time of last change */ 50 #if __WORDSIZE == 32 51 unsigned long int __unused3; 52 #endif 53 unsigned long int __msg_cbytes; /* current number of bytes on queue */ 54 msgqnum_t msg_qnum; /* number of messages currently on queue */ 55 msglen_t msg_qbytes; /* max number of bytes allowed on queue */ 56 __pid_t msg_lspid; /* pid of last msgsnd() */ 57 __pid_t msg_lrpid; /* pid of last msgrcv() */ 58 unsigned long int __unused4; 59 unsigned long int __unused5; 60 }; 61 62 #ifdef __USE_MISC 63 64 # define msg_cbytes __msg_cbytes 65 66 /* ipcs ctl commands */ 67 # define MSG_STAT 11 68 # define MSG_INFO 12 69 70 /* buffer for msgctl calls IPC_INFO, MSG_INFO */ 71 struct msginfo 72 { 73 int msgpool; 74 int msgmap; 75 int msgmax; 76 int msgmnb; 77 int msgmni; 78 int msgssz; 79 int msgtql; 80 unsigned short int msgseg; 81 }; 82 83 #endif /* __USE_MISC */ 84
