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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | /* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ /* * File: ipc/ipc_mqueue.h * Author: Rich Draves * Date: 1989 * * Definitions for message queues. */ #ifndef _IPC_IPC_MQUEUE_H_ #define _IPC_IPC_MQUEUE_H_ #include <mach_assert.h> #include <mach/message.h> #include <kern/assert.h> #include <kern/macro_help.h> #include <kern/wait_queue.h> #include <ipc/ipc_kmsg.h> #include <ipc/ipc_object.h> #include <ipc/ipc_types.h> typedef struct ipc_mqueue { union { struct { struct wait_queue wait_queue; struct ipc_kmsg_queue messages; mach_port_msgcount_t msgcount; mach_port_msgcount_t qlimit; mach_port_seqno_t seqno; boolean_t fullwaiters; } port; struct wait_queue_sub set_queue; } data; } *ipc_mqueue_t; #define IMQ_NULL ((ipc_mqueue_t) 0) #define imq_wait_queue data.port.wait_queue #define imq_messages data.port.messages #define imq_msgcount data.port.msgcount #define imq_qlimit data.port.qlimit #define imq_seqno data.port.seqno #define imq_fullwaiters data.port.fullwaiters #define imq_set_queue data.set_queue #define imq_setlinks data.set_queue.wqs_sublinks #define imq_is_set(mq) wait_queue_is_sub(&(mq)->imq_set_queue) #define imq_lock(mq) wait_queue_lock(&(mq)->imq_wait_queue) #define imq_lock_try(mq) wait_queue_lock_try(&(mq)->imq_wait_queue) #define imq_unlock(mq) wait_queue_unlock(&(mq)->imq_wait_queue) #define imq_held(mq) wait_queue_held(&(mq)->imq_wait_queue) #define imq_full(mq) ((mq)->imq_msgcount >= (mq)->imq_qlimit) extern int ipc_mqueue_full; extern int ipc_mqueue_rcv; #define IPC_MQUEUE_FULL (event_t)&ipc_mqueue_full #define IPC_MQUEUE_RECEIVE (event_t)&ipc_mqueue_rcv /* * Exported interfaces */ /* Initialize a newly-allocated message queue */ extern void ipc_mqueue_init( ipc_mqueue_t mqueue, boolean_t is_set); /* Move messages from one queue to another */ extern void ipc_mqueue_move( ipc_mqueue_t dest, ipc_mqueue_t source, ipc_port_t port); /* Wake up receivers waiting in a message queue */ extern void ipc_mqueue_changed( ipc_mqueue_t mqueue); /* Send a message to a port */ extern mach_msg_return_t ipc_mqueue_send( ipc_mqueue_t mqueue, ipc_kmsg_t kmsg, mach_msg_option_t option, mach_msg_timeout_t timeout); /* Deliver message to message queue or waiting receiver */ extern void ipc_mqueue_post( ipc_mqueue_t mqueue, ipc_kmsg_t kmsg); /* Receive a message from a message queue */ extern void ipc_mqueue_receive( ipc_mqueue_t mqueue, mach_msg_option_t option, mach_msg_size_t max_size, mach_msg_timeout_t timeout, int interruptible); /* Continuation routine for message receive */ extern void ipc_mqueue_receive_continue(void); /* Select a message from a queue and try to post it to ourself */ extern void ipc_mqueue_select( ipc_mqueue_t mqueue, mach_msg_option_t option, mach_msg_size_t max_size); /* Clear a message count reservation */ extern void ipc_mqueue_release_msgcount( ipc_mqueue_t mqueue); /* Change a queue limit */ extern void ipc_mqueue_set_qlimit( ipc_mqueue_t mqueue, mach_port_msgcount_t qlimit); /* Change a queue's sequence number */ extern void ipc_mqueue_set_seqno( ipc_mqueue_t mqueue, mach_port_seqno_t seqno); /* Convert a name in a space to a message queue */ extern mach_msg_return_t ipc_mqueue_copyin( ipc_space_t space, mach_port_name_t name, ipc_mqueue_t *mqueuep, ipc_object_t *objectp); #endif /* _IPC_IPC_MQUEUE_H_ */ |