xnu-792.17.14.tar.gz

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

diff --git a/iokit/IOKit/IOUserClient.h b/iokit/IOKit/IOUserClient.h
index 117db52591059ca320df7e5af79765b7c7f08201..17378e7bd9e09efb9ca09b3980c6ea1bfdff2a72 100644 (file)
--- a/iokit/IOKit/IOUserClient.h
+++ b/iokit/IOKit/IOUserClient.h
@@ -1,16 +1,19 @@
 /*
  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * @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
@@ -20,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
 /*
@@ -40,7 +43,7 @@ enum {
     kIOUCScalarIScalarO = 0,
     kIOUCScalarIStructO = 2,
     kIOUCStructIStructO = 3,
-    kIOUCScalarIStructI = 4,
+    kIOUCScalarIStructI = 4
 };
 
 typedef IOReturn (IOService::*IOMethod)(void * p1, void * p2, void * p3,
@@ -82,6 +85,12 @@ enum {
 #define kIOClientPrivilegeAdministrator        "root"
 #define kIOClientPrivilegeLocalUser    "local"
 
+/*!
+    @class IOUserClient
+    @abstract   Provides a basis for communication between client applications and I/O Kit objects.
+*/
+
+
 class IOUserClient : public IOService
 {
     OSDeclareAbstractStructors(IOUserClient)
@@ -89,11 +98,12 @@ class IOUserClient : public IOService
 protected:
 /*! @struct ExpansionData
     @discussion This structure will be used to expand the capablilties of this class in the future.
-    */    
+*/    
     struct ExpansionData { };
 
 /*! @var reserved
-    Reserved for future use.  (Internal use only)  */
+    Reserved for future use.  (Internal use only) 
+*/
     ExpansionData * reserved;
 
 public:
@@ -165,12 +175,21 @@ public:
                                     task_t task,
                                     IOOptionBits mapFlags = kIOMapAnywhere,
                                    IOVirtualAddress atAddress = 0 );
+
+    /*!
+        @function removeMappingForDescriptor
+        Remove the first mapping created from the memory descriptor returned by clientMemoryForType() from IOUserClient's list of mappings. If such a mapping exists, it is retained and the reference currently held by IOUserClient is returned to the caller.
+        @param memory The memory descriptor instance previously returned by the implementation of clientMemoryForType().
+        @result A reference to the first IOMemoryMap instance found in the list of mappings created by IOUserClient from that passed memory descriptor is returned, or zero if none exist. The caller should release this reference.
+    */
+    IOMemoryMap * removeMappingForDescriptor(IOMemoryDescriptor * memory);
+
     /*!
         @function exportObjectToClient
         Make an arbitrary OSObject available to the client task.
-        @param task The task
-        @param obj The object we want to export to the client
-        @param clientObj returned value is the client's port name.
+        @param task The task.
+        @param obj The object we want to export to the client.
+        @param clientObj Returned value is the client's port name.
     */
     virtual IOReturn exportObjectToClient(task_t task,
                                OSObject *obj, io_object_t *clientObj);