Method getControllerViaMatching

USBToolBox/USBToolBox.cpp:114–156

}

IORegistryEntry* USBToolBox::getControllerViaMatching() {
    PE_parse_boot_argn(bootargMatchWait, &matchWait, sizeof(matchWait));
    
    if (OSObject* matchWaitProperty = pciDevice->getProperty(propertyMatchWait)) {
        if (OSNumber* matchWaitNumber = OSDynamicCast(OSNumber, matchWaitProperty)) {
            matchWait = matchWaitNumber->unsigned64BitValue();
        } else {
            DEBUGLOGPROV("Provider match wait property is incorrect type");
        }
    }
    
    if (OSObject* matchWaitProperty = getProperty(propertyMatchWait)) {
        if (OSNumber* matchWaitNumber = OSDynamicCast(OSNumber, matchWaitProperty)) {
            matchWait = matchWaitNumber->unsigned64BitValue();
        } else {
            DEBUGLOGPROV("Match wait property is incorrect type");
        }
    }
    
    if (matchWait > MAX_WAIT) {
        SYSTEMLOGPROV("Match wait is too high, ignoring");
        matchWait = DEFAULT_WAIT;
    }
    
    OSDictionary* matchingDict = createMatchingDictionary();
    
    if (!matchingDict) {
        SYSTEMLOGPROV("Failed to create matching dict!");
        return NULL;
    }
    
    DEBUGLOGPROV("Starting waitForMatchingService");
    IOService* controller = IOService::waitForMatchingService(matchingDict, matchWait * NANOSECONDS);
    
    OSSafeReleaseNULL(matchingDict);
    
    if (controller) {
        DEBUGLOGPROV("waitForMatchingService successful");
    } else {
        SYSTEMLOGPROV("waitForMatchingService failed or timed out, will try different method");
    }
    return controller;
}

bool USBToolBox::checkClassHierarchy(IORegistryEntry* entry, const char* className) {
    const OSSymbol* classSymbol = OSSymbol::withCString(className);