1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_MSG_IMPL_H 27 #define _SYS_MSG_IMPL_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/ipc_impl.h> 32 #if defined(_KERNEL) || defined(_KMEMUSER) 33 #include <sys/msg.h> 34 #include <sys/t_lock.h> 35 #include <sys/list.h> 36 #endif 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * Argument vectors for the various flavors of msgsys(). 44 */ 45 46 #define MSGGET 0 47 #define MSGCTL 1 48 #define MSGRCV 2 49 #define MSGSND 3 50 #define MSGIDS 4 51 #define MSGSNAP 5 52 53 #if defined(_KERNEL) || defined(_KMEMUSER) 54 55 /* 56 * There is one msg structure for each message in the system. 57 */ 58 struct msg { 59 list_node_t msg_node; /* message list node */ 60 long msg_type; /* message type */ 61 size_t msg_size; /* message text size */ 62 void *msg_addr; /* message text address */ 63 long msg_flags; /* message flags */ 64 long msg_copycnt; /* current # of copyouts on message */ 65 }; 66 67 /* 68 * Per message flags 69 */ 70 #define MSG_RCVCOPY 00001 /* msgrcv is copying out this message */ 71 #define MSG_UNLINKED 00002 /* msg has been unlinked from queue */ 72 73 /* 74 * msg_rcv_cv is now an array of kcondvar_t for performance reason. 75 * We use multiple condition variables (kcondvar_t) to avoid needing 76 * to wake all readers when sending a single message. 77 */ 78 #define MAX_QNUM 63 79 #define MAX_QNUM_CV 64 80 #define MSG_QNUM(x) ((x < 1) ? 0 : (x % MAX_QNUM) + 1) 81 82 typedef struct kmsqid { 83 kipc_perm_t msg_perm; /* operation permission struct */ 84 list_t msg_list; /* list of messages on q */ 85 msglen_t msg_cbytes; /* current # bytes on q */ 86 msgqnum_t msg_qnum; /* # of messages on q */ 87 msgqnum_t msg_qmax; /* max # of messages on q */ 88 msglen_t msg_qbytes; /* max # of bytes on q */ 89 pid_t msg_lspid; /* pid of last msgsnd */ 90 pid_t msg_lrpid; /* pid of last msgrcv */ 91 time_t msg_stime; /* last msgsnd time */ 92 time_t msg_rtime; /* last msgrcv time */ 93 time_t msg_ctime; /* last change time */ 94 uint64_t msg_snd_cnt; /* # of waiting senders */ 95 uint64_t msg_rcv_cnt[MAX_QNUM_CV]; /* # of waiting receivers */ 96 kcondvar_t msg_snd_cv; 97 kcondvar_t msg_rcv_cv[MAX_QNUM_CV]; 98 } kmsqid_t; 99 100 #endif /* _KERNEL */ 101 102 #if defined(_SYSCALL32) 103 /* 104 * LP64 view of the ILP32 msgbuf structure 105 */ 106 struct ipcmsgbuf32 { 107 int32_t mtype; /* message type */ 108 char mtext[1]; /* message text */ 109 }; 110 111 /* 112 * LP64 view of the ILP32 msgsnap_head and msgsnap_mhead structures 113 */ 114 struct msgsnap_head32 { 115 size32_t msgsnap_size; /* bytes consumed/required in the buffer */ 116 size32_t msgsnap_nmsg; /* number of messages in the buffer */ 117 }; 118 119 struct msgsnap_mhead32 { 120 size32_t msgsnap_mlen; /* number of bytes in message that follows */ 121 int32_t msgsnap_mtype; /* message type */ 122 }; 123 124 /* 125 * LP64 view of the ILP32 msqid_ds structure 126 */ 127 struct msqid_ds32 { 128 struct ipc_perm32 msg_perm; /* operation permission struct */ 129 caddr32_t msg_first; /* ptr to first message on q */ 130 caddr32_t msg_last; /* ptr to last message on q */ 131 uint32_t msg_cbytes; /* current # bytes on q */ 132 uint32_t msg_qnum; /* # of messages on q */ 133 uint32_t msg_qbytes; /* max # of bytes on q */ 134 pid32_t msg_lspid; /* pid of last msgsnd */ 135 pid32_t msg_lrpid; /* pid of last msgrcv */ 136 time32_t msg_stime; /* last msgsnd time */ 137 int32_t msg_pad1; /* reserved for time_t expansion */ 138 time32_t msg_rtime; /* last msgrcv time */ 139 int32_t msg_pad2; /* time_t expansion */ 140 time32_t msg_ctime; /* last change time */ 141 int32_t msg_pad3; /* time expansion */ 142 int16_t msg_cv; 143 int16_t msg_qnum_cv; 144 int32_t msg_pad4[3]; /* reserve area */ 145 }; 146 #endif /* _SYSCALL32 */ 147 148 #ifdef __cplusplus 149 } 150 #endif 151 152 #endif /* _SYS_MSG_IMPL_H */ 153