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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Games/index.html">Games</a> > <a href="../../samplecode/Games/idxHumanInterfaceDeviceForceFeedback-date.html">Human Interface Device & Force Feedback</a> > <A HREF="javascript:location.replace('index.html');">HID Config Save</A> >
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<h2>/HID Utilities/ImmrHIDUtilAddOn.c</h2>
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<pre class="sourcecodebox">//
// File: ImmrHIDUtilAddOn.c
//
// Contains: Glue code to convert IOHIDDeviceRef to (FFB) io_object_t
//
// Copyright: Copyright (c) 2008 Apple Inc., All Rights Reserved
//
// Disclaimer: IMPORTANT: This Apple software is supplied to you by
// Apple Inc. ("Apple") in consideration of your agreement to the
// following terms, and your use, installation, modification or
// redistribution of this Apple software constitutes acceptance of these
// terms. If you do not agree with these terms, please do not use,
// install, modify or redistribute this Apple software.
//
// In consideration of your agreement to abide by the following terms, and
// subject to these terms, Apple grants you a personal, non-exclusive
// license, under Apple's copyrights in this original Apple software (the
// "Apple Software"), to use, reproduce, modify and redistribute the Apple
// Software, with or without modifications, in source and/or binary forms;
// provided that if you redistribute the Apple Software in its entirety and
// without modifications, you must retain this notice and the following
// text and disclaimers in all such redistributions of the Apple Software.
// Neither the name, trademarks, service marks or logos of Apple Inc.
// may be used to endorse or promote products derived from the Apple
// Software without specific prior written permission from Apple. Except
// as expressly stated in this notice, no other rights or licenses, express
// or implied, are granted by Apple herein, including but not limited to
// any patent rights that may be infringed by your derivative works or by
// other works in which the Apple Software may be incorporated.
//
// The Apple Software is provided by Apple on an "AS IS" basis. APPLE
// MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
// THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
// OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
//
// IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
// OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
// MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
// AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
// STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
#include <mach/mach.h>
#include <mach/mach_error.h>
#include "ImmrHIDUtilAddOn.h"
//---------------------------------------------------------------------------------
//
// AllocateHIDObjectFromRecDevice( )
//
// returns:
// NULL, or acceptable io_object_t
//
//---------------------------------------------------------------------------------
io_service_t AllocateHIDObjectFromRecDevice( IOHIDDeviceRef inIOHIDDeviceRef )
{
io_service_t result = 0L;
if ( inIOHIDDeviceRef ) {
// Set up the matching criteria for the devices we're interested in.
// We are interested in instances of class IOHIDDevice.
// matchingDict is consumed below( in IOServiceGetMatchingService )
// so we have no leak here.
CFMutableDictionaryRef matchingDict = IOServiceMatching( kIOHIDDeviceKey );
if ( matchingDict ) {
// Add a key for locationID to our matching dictionary. This works for matching to
// IOHIDDevices, so we will only look for a device attached to that particular port
// on the machine.
CFTypeRef tCFTypeRef = IOHIDDeviceGetProperty( inIOHIDDeviceRef, CFSTR( kIOHIDLocationIDKey ) );
if ( tCFTypeRef ) {
CFDictionaryAddValue( matchingDict, CFSTR( kIOHIDLocationIDKey ), tCFTypeRef );
CFRelease( tCFTypeRef );
// IOServiceGetMatchingService assumes that we already know that there is only one device
// that matches. This way we don't have to do the whole iteration dance to look at each
// device that matches. This is a new API in 10.2
result = IOServiceGetMatchingService( kIOMasterPortDefault, matchingDict );
}
// Note: We're not leaking the matchingDict.
// One reference is consumed by IOServiceGetMatchingServices
}
}
return result;
}
//---------------------------------------------------------------------------------
//
// FreeHIDObject( )
//
//---------------------------------------------------------------------------------
bool FreeHIDObject( io_service_t inHIDObject )
{
kern_return_t kr;
kr = IOObjectRelease( inHIDObject );
return( kIOReturnSuccess == kr );
}
</pre>
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