Beispiel #1
0
/* Function to scan the system for joysticks.
 * Joystick 0 should be the system default joystick.
 * This function should return the number of available joysticks, or -1
 * on an unrecoverable fatal error.
 */
int
SDL_SYS_JoystickInit(void)
{
    if (gpDeviceList) {
        return SDL_SetError("Joystick: Device list already inited.");
    }

    if (!CreateHIDManager()) {
        return SDL_SetError("Joystick: Couldn't initialize HID Manager");
    }

    return SDL_SYS_NumJoysticks();
}
Beispiel #2
0
/*
 * Count the number of joysticks attached to the system
 */
int
SDL_NumJoysticks(void)
{
    return SDL_SYS_NumJoysticks();
}
/* Function to scan the system for joysticks.
 * Joystick 0 should be the system default joystick.
 * This function should return the number of available joysticks, or -1
 * on an unrecoverable fatal error.
 */
int
SDL_SYS_JoystickInit(void)
{
    IOReturn result = kIOReturnSuccess;
    mach_port_t masterPort = 0;
    io_iterator_t hidObjectIterator = 0;
    CFMutableDictionaryRef hidMatchDictionary = NULL;
    io_object_t ioHIDDeviceObject = 0;
	io_iterator_t portIterator = 0;

    if (gpDeviceList) {
        SDL_SetError("Joystick: Device list already inited.");
        return -1;
    }

    result = IOMasterPort(bootstrap_port, &masterPort);
    if (kIOReturnSuccess != result) {
        SDL_SetError("Joystick: IOMasterPort error with bootstrap_port.");
        return -1;
    }

    /* Set up a matching dictionary to search I/O Registry by class name for all HID class devices. */
    hidMatchDictionary = IOServiceMatching(kIOHIDDeviceKey);
    if (hidMatchDictionary) {
        /* Add key for device type (joystick, in this case) to refine the matching dictionary. */

        /* NOTE: we now perform this filtering later
           UInt32 usagePage = kHIDPage_GenericDesktop;
           UInt32 usage = kHIDUsage_GD_Joystick;
           CFNumberRef refUsage = NULL, refUsagePage = NULL;

           refUsage = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &usage);
           CFDictionarySetValue (hidMatchDictionary, CFSTR (kIOHIDPrimaryUsageKey), refUsage);
           refUsagePage = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &usagePage);
           CFDictionarySetValue (hidMatchDictionary, CFSTR (kIOHIDPrimaryUsagePageKey), refUsagePage);
         */
    } else {
        SDL_SetError
            ("Joystick: Failed to get HID CFMutableDictionaryRef via IOServiceMatching.");
        return -1;
    }

    /*/ Now search I/O Registry for matching devices. */
    result =
        IOServiceGetMatchingServices(masterPort, hidMatchDictionary,
                                     &hidObjectIterator);
    /* Check for errors */
    if (kIOReturnSuccess != result) {
        SDL_SetError("Joystick: Couldn't create a HID object iterator.");
        return -1;
    }
    if (!hidObjectIterator) {   /* there are no joysticks */
        gpDeviceList = NULL;
        return 0;
    }
    /* IOServiceGetMatchingServices consumes a reference to the dictionary, so we don't need to release the dictionary ref. */

    /* build flat linked list of devices from device iterator */

    gpDeviceList = NULL;

    while ((ioHIDDeviceObject = IOIteratorNext(hidObjectIterator))) {
		AddDeviceHelper( ioHIDDeviceObject );
    }
    result = IOObjectRelease(hidObjectIterator);        /* release the iterator */
	
	/* now connect notification for new devices */
	notificationPort = IONotificationPortCreate(masterPort);
	hidMatchDictionary = IOServiceMatching(kIOHIDDeviceKey);

	CFRunLoopAddSource(CFRunLoopGetCurrent(), 
					   IONotificationPortGetRunLoopSource(notificationPort), 
					   kCFRunLoopDefaultMode);
	
	// Register for notifications when a serial port is added to the system
	result = IOServiceAddMatchingNotification(notificationPort,
															kIOFirstMatchNotification,
															hidMatchDictionary,
															JoystickDeviceWasAddedCallback,
															NULL,           
															&portIterator);
	while (IOIteratorNext(portIterator)) {}; // Run out the iterator or notifications won't start (you can also use it to iterate the available devices).

    return SDL_SYS_NumJoysticks();
}