xnu-1504.7.4.tar.gz

[apple/xnu.git] / iokit / IOKit / IODataQueueShared.h

diff --git a/iokit/IOKit/IODataQueueShared.h b/iokit/IOKit/IODataQueueShared.h
index eb37748d76d429ca9fb0416eb9a0ae8f732728c3..2fa0e9a450c2aaf3167af4b93560164b0a452893 100644 (file)
--- a/iokit/IOKit/IODataQueueShared.h
+++ b/iokit/IOKit/IODataQueueShared.h
@@ -1,14 +1,19 @@
 /*
  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
@@ -18,13 +23,15 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
 #ifndef _IOKIT_IODATAQUEUESHARED_H
 #define _IOKIT_IODATAQUEUESHARED_H
 
 #include <libkern/OSTypes.h>
+#include <mach/port.h>
+#include <mach/message.h>
 
 /*!
  * @typedef IODataQueueEntry
@@ -35,7 +42,7 @@
  */
 typedef struct _IODataQueueEntry{
     UInt32  size;
-    void *  data;
+    UInt8   data[4];
 } IODataQueueEntry;
 
 /*!
@@ -54,15 +61,32 @@ typedef struct _IODataQueueMemory {
     IODataQueueEntry  queue[1];
 } IODataQueueMemory;
 
+/*!
+ * @typedef IODataQueueAppendix
+ * @abstract A struct mapping to the appendix region of a data queue.
+ * @discussion This struct is variable sized dependent on the version.  The struct represents the data queue appendix information.
+ * @field version The version of the queue appendix.
+ * @field port The notification port associated with this queue.
+ */
+typedef struct _IODataQueueAppendix {
+    UInt32            version;
+    mach_msg_header_t msgh;
+} IODataQueueAppendix;
+
 /*!
  * @defined DATA_QUEUE_ENTRY_HEADER_SIZE Represents the size of the data queue entry header independent of the actual size of the data in the entry.  This is the overhead of each entry in the queue.  The total size of an entry is equal to this value plus the size stored in the entry's size field (in IODataQueueEntry).
  */
-#define DATA_QUEUE_ENTRY_HEADER_SIZE (sizeof(IODataQueueEntry) - sizeof(void *))
+#define DATA_QUEUE_ENTRY_HEADER_SIZE (sizeof(IODataQueueEntry) - 4)
 
 /*!
- * @defined DATA_QUEUE_MEMORY_HEADER_SIZE Represents the size of the data queue memory header independent of the actual size of the queue data itself.  The total size of the queue memory is equal to this value plus the size of the queue data region which is stored in the queueSize field of IODataQueueMeory.
+ * @defined DATA_QUEUE_MEMORY_HEADER_SIZE Represents the size of the data queue memory header independent of the actual size of the queue data itself.  The total size of the queue memory is equal to this value plus the size of the queue appendix and the size of the queue data region which is stored in the queueSize field of IODataQueueMeory.
  */
 #define DATA_QUEUE_MEMORY_HEADER_SIZE (sizeof(IODataQueueMemory) - sizeof(IODataQueueEntry))
 
+/*!
+ * @defined DATA_QUEUE_MEMORY_APPENDIX_SIZE Represents the size of the data queue memory appendix independent of the actual size of the queue data itself.  The total size of the queue memory is equal to this value plus the size of queue header and size of the queue data region which is stored in the queueSize field of IODataQueueMeory.
+ */
+#define DATA_QUEUE_MEMORY_APPENDIX_SIZE (sizeof(IODataQueueAppendix))
+
 #endif /* _IOKIT_IODATAQUEUESHARED_H */