static void serviceClientCallback(void * target, void * refcon, IOHIDServiceClientRef service)
{
CFStringRef string;
if ( refcon == kServiceAdded ) {
IOHIDServiceClientRegisterRemovalCallback(service, serviceClientCallback, NULL, (void*)kServiceRemoved);
}
printf("SERVICE %s:\n", (char *)refcon);
string = CFCopyDescription(service);
if ( string ) {
printf("%s\n", CFStringGetCStringPtr(string, kCFStringEncodingMacRoman));
CFRelease(string);
}
if ( __clientType == kIOHIDEventSystemClientTypeRateControlled ) {
CFNumberRef number;
uint32_t primaryUsagePage=0, primaryUsage=0;
number = IOHIDServiceClientCopyProperty(service, CFSTR(kIOHIDServicePrimaryUsagePageKey));
if ( number ) {
CFNumberGetValue(number, kCFNumberSInt32Type, &primaryUsagePage);
CFRelease(number);
}
number = IOHIDServiceClientCopyProperty(service, CFSTR(kIOHIDServicePrimaryUsageKey));
if ( number ) {
CFNumberGetValue(number, kCFNumberSInt32Type, &primaryUsage);
CFRelease(number);
}
if ( primaryUsagePage == __matchingUsagePage && primaryUsage == __matchingUsage ) {
number = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &__matchingInterval);
if ( number ) {
IOHIDServiceClientSetProperty(service, CFSTR(kIOHIDServiceReportIntervalKey), number);
CFRelease(number);
}
}
}
}
kern_return_t
IOHIDGetModifierLockState( io_connect_t handle __unused, int selector, bool *state )
{
kern_return_t err = kIOReturnSuccess;
boolean_t modifierState = false;
IOHIDEventSystemClientRef client = NULL;
CFArrayRef services = NULL;
if (selector != kIOHIDCapsLockState && selector != kIOHIDNumLockState) {
err = kIOReturnBadArgument;
goto exit;
}
client = IOHIDEventSystemClientCreateWithType (kCFAllocatorDefault, kIOHIDEventSystemClientTypePassive, NULL);
if (client == NULL) {
os_log_error (OS_LOG_DEFAULT, "Failed to create event system client");
return kIOReturnError;
}
services = (CFArrayRef) IOHIDEventSystemClientCopyServices (client);
if (services == NULL || CFArrayGetCount(services) == 0) {
err = kIOReturnNoDevice;
goto exit;
}
for (CFIndex index = 0; index < CFArrayGetCount(services); index++) {
IOHIDServiceClientRef service = (IOHIDServiceClientRef) CFArrayGetValueAtIndex(services, index);
if (service && IOHIDServiceClientConformsTo (service, kHIDPage_GenericDesktop, kHIDUsage_GD_Keyboard)) {
CFStringRef key = (selector == kIOHIDCapsLockState) ? CFSTR(kIOHIDServiceCapsLockStateKey) : CFSTR(kIOHIDServiceNumLockStateKey);
CFBooleanRef modifierStateProp = (CFBooleanRef)IOHIDServiceClientCopyProperty(service, key);
if (modifierStateProp) {
modifierState = CFBooleanGetValue(modifierStateProp);
if (modifierState) {
break;
}
CFRelease(modifierStateProp);
}
}
}
exit:
*state = modifierState;
if (services) {
CFRelease(services);
}
if (client) {
CFRelease(client);
}
return err;
}
kern_return_t IOHIDCopyHIDParameterFromEventSystem(io_connect_t handle, CFStringRef key, CFTypeRef *parameter) {
CFTypeRef param = NULL;
IOHIDEventSystemClientRef client = IOHIDEventSystemClientCreateWithType (kCFAllocatorDefault, kIOHIDEventSystemClientTypePassive, NULL);
kern_return_t kr = kIOReturnNotReady;
if (!client) {
goto exit;
}
io_service_t service = 0;
if (IOConnectGetService (handle, &service) == kIOReturnSuccess) {
if (IOObjectConformsTo (service, "IOHIDSystem")) {
param = IOHIDEventSystemClientCopyProperty(client, key);
} else {
uint64_t entryID = 0;
if (IORegistryEntryGetRegistryEntryID (service, &entryID) == kIOReturnSuccess) {
IOHIDServiceClientRef serviceClient = IOHIDEventSystemClientCopyServiceForRegistryID(client, entryID);
if (serviceClient) {
param = IOHIDServiceClientCopyProperty(serviceClient, key);
CFRelease(serviceClient);
}
}
}
IOObjectRelease(service);
}
exit:
if (param) {
*parameter = param;
kr = kIOReturnSuccess;
}
if (client) {
CFRelease(client);
}
if (kr) {
os_log_error(_IOHIDLog(), "Fail to get parameter with status 0x%x", kr);
}
return kr;
}
