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, 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 #include <bits/wordsize.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 /* Structure of record for one message inside the kernel. 36 The type `struct msg' is opaque. */ 37 struct msqid_ds 38 { 39 struct ipc_perm msg_perm; /* structure describing operation permission */ 40 __time_t msg_stime; /* time of last msgsnd command */ 41 #if __WORDSIZE == 32 42 unsigned long int __uclibc_unused1; 43 #endif 44 __time_t msg_rtime; /* time of last msgrcv command */ 45 #if __WORDSIZE == 32 46 unsigned long int __uclibc_unused2; 47 #endif 48 __time_t msg_ctime; /* time of last change */ 49 #if __WORDSIZE == 32 50 unsigned long int __uclibc_unused3; 51 #endif 52 unsigned long int __msg_cbytes; /* current number of bytes on queue */ 53 msgqnum_t msg_qnum; /* number of messages currently on queue */ 54 msglen_t msg_qbytes; /* max number of bytes allowed on queue */ 55 __pid_t msg_lspid; /* pid of last msgsnd() */ 56 __pid_t msg_lrpid; /* pid of last msgrcv() */ 57 unsigned long int __uclibc_unused4; 58 unsigned long int __uclibc_unused5; 59 }; 60 61 #ifdef __USE_MISC 62 63 # define msg_cbytes __msg_cbytes 64 65 /* ipcs ctl commands */ 66 # define MSG_STAT 11 67 # define MSG_INFO 12 68 69 /* buffer for msgctl calls IPC_INFO, MSG_INFO */ 70 struct msginfo 71 { 72 int msgpool; 73 int msgmap; 74 int msgmax; 75 int msgmnb; 76 int msgmni; 77 int msgssz; 78 int msgtql; 79 unsigned short int msgseg; 80 }; 81 82 #endif /* __USE_MISC */ 83