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, 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 unsigned long int msgqnum_t; 32 typedef unsigned long int msglen_t; 33 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 #if (__WORDSIZE == 32 && defined(__riscv) && defined(__UCLIBC_USE_TIME64__)) 41 unsigned long int msg_stime_internal_1; 42 unsigned long int msg_stime_internal_2; 43 unsigned long int msg_rtime_internal_1; 44 unsigned long int msg_rtime_internal_2; 45 unsigned long int msg_ctime_internal_1; 46 unsigned long int msg_ctime_internal_2; 47 #else 48 __time_t msg_stime; /* time of last msgsnd command */ 49 unsigned long int __uclibc_unused1; 50 __time_t msg_rtime; /* time of last msgrcv command */ 51 unsigned long int __uclibc_unused2; 52 __time_t msg_ctime; /* time of last change */ 53 unsigned long int __uclibc_unused3; 54 #endif 55 unsigned long int __msg_cbytes; /* current number of bytes on queue */ 56 msgqnum_t msg_qnum; /* number of messages currently on queue */ 57 msglen_t msg_qbytes; /* max number of bytes allowed on queue */ 58 __pid_t msg_lspid; /* pid of last msgsnd() */ 59 __pid_t msg_lrpid; /* pid of last msgrcv() */ 60 #if (__WORDSIZE == 32 && defined(__riscv) && defined(__UCLIBC_USE_TIME64__)) 61 __time_t msg_stime; /* time of last msgsnd command */ 62 __time_t msg_rtime; /* time of last msgrcv command */ 63 __time_t msg_ctime; /* time of last change */ 64 #endif 65 unsigned long int __uclibc_unused4; 66 unsigned long int __uclibc_unused5; 67 }; 68 69 #ifdef __USE_MISC 70 71 # define msg_cbytes __msg_cbytes 72 73 /* ipcs ctl commands */ 74 # define MSG_STAT 11 75 # define MSG_INFO 12 76 77 /* buffer for msgctl calls IPC_INFO, MSG_INFO */ 78 struct msginfo 79 { 80 int msgpool; 81 int msgmap; 82 int msgmax; 83 int msgmnb; 84 int msgmni; 85 int msgssz; 86 int msgtql; 87 unsigned short int msgseg; 88 }; 89 90 #endif /* __USE_MISC */ 91