Method QueueRead

WirelessGamingReceiver/WirelessGamingReceiver.cpp:249–278

Queue a read on a controller

// Queue a read on a controller
bool WirelessGamingReceiver::QueueRead(int index)
{
    IOUSBCompletion complete;
    IOReturn err;
    WGRREAD *data = (WGRREAD*)IOMalloc(sizeof(WGRREAD));

    if (data == NULL)
        return false;
    data->index = index;
    data->buffer = IOBufferMemoryDescriptor::inTaskWithOptions(kernel_task, 0, GetMaxPacketSize(connections[index].controllerIn));
    if (data->buffer == NULL)
    {
        IOFree(data, sizeof(WGRREAD));
        return false;
    }

    complete.target = this;
    complete.action = _ReadComplete;
    complete.parameter = data;

    err = connections[index].controllerIn->Read(data->buffer, 0, 0, data->buffer->getLength(), &complete);
    if (err == kIOReturnSuccess)
        return true;

    data->buffer->release();
    IOFree(data, sizeof(WGRREAD));

    // IOLog("read - failed to start (0x%.8x)\n", err);
    return false;
}

// Handle a completed read on a controller
void WirelessGamingReceiver::ReadComplete(void *parameter, IOReturn status, UInt32 bufferSizeRemaining)