95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
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/*
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* ImmrHIDUtilAddOn.c
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* UseFFAPIFromHIDUtilities
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*
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* Created by rlacroix on Wed Oct 16 2002.
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* Copyright (c) 2002 Immersion Corporation. All rights reserved.
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*
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*/
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#include <mach/mach.h>
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#include <mach/mach_error.h>
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#include <IOKit/IOKitLib.h>
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#include <IOKit/IOCFPlugIn.h>
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#include <IOKit/hid/IOHIDLib.h>
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#include <IOKit/hid/IOHIDUsageTables.h>
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#include "HID_Utilities_External.h"
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#include "ImmrHIDUtilAddOn.h"
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//---------------------------------------------------------------------------------
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//
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// AllocateHIDObjectFromRecDevice()
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//
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// returns:
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// NULL, or acceptable io_object_t
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//
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//---------------------------------------------------------------------------------
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io_service_t AllocateHIDObjectFromRecDevice( pRecDevice pDevice )
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{
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CFMutableDictionaryRef matchingDict;
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UInt32 locationID = pDevice->locID;
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CFNumberRef refUsage = NULL;
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mach_port_t masterPort = NULL;
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IOReturn result = kIOReturnSuccess;
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io_service_t hidDevice = NULL;
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do // while( 0 )
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{
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result = IOMasterPort (bootstrap_port, &masterPort);
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if( result != kIOReturnSuccess )
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{
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break;
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}
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// Set up the matching criteria for the devices we're interested in.
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// We are interested in instances of class IOHIDDevice.
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// matchingDict is consumed below (in IOServiceGetMatchingService)
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// so we have no leak here.
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//
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matchingDict = IOServiceMatching(kIOHIDDeviceKey);
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if (!matchingDict)
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{
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break;
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}
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// Add a key for locationID to our matching dictionary. This works for matching to
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// IOHIDDevices, so we will only look for a device attached to that particular port
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// on the machine.
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//
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refUsage = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &locationID);
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CFDictionaryAddValue( matchingDict,
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CFSTR(kIOHIDLocationIDKey),
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refUsage);
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CFRelease(refUsage);
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// IOServiceGetMatchingService assumes that we already know that there is only one device
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// that matches. This way we don't have to do the whole iteration dance to look at each
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// device that matches. This is a new API in 10.2
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//
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hidDevice = IOServiceGetMatchingService( masterPort, matchingDict);
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}
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while( 0 );
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// Free master port if we created one.
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//
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if (masterPort)
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mach_port_deallocate(mach_task_self(), masterPort);
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return hidDevice;
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}
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//---------------------------------------------------------------------------------
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//
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// FreeHIDObject()
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//
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//---------------------------------------------------------------------------------
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bool FreeHIDObject( io_service_t hidDevice )
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{
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kern_return_t kr;
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kr = IOObjectRelease(hidDevice);
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return( kIOReturnSuccess == kr );
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}
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