static void printDeviceList()
{
printf("\n%d available devices:\n", gDeviceListSize);
for(DWORD i = 0; i < gDeviceListSize; ++i) {
printf("Device % 3d: ", i);
UKW_DEVICE dev = gDeviceList[i];
unsigned char bus, devAddr;
unsigned long sessionId;
if (!UkwGetDeviceAddress(dev, &bus, &devAddr, &sessionId)) {
printf("Failed to retrieve address\n");
continue;
}
printf("bus %d, device address %d, session id %d\n", bus, devAddr, sessionId);
printf("\t");
UKW_DEVICE_DESCRIPTOR desc;
if (!UkwGetDeviceDescriptor(dev, &desc)) {
printf("Failed to retrieve device descriptor\n");
continue;
}
printf("vid: 0x%04x pid: 0x%04x\n", desc.idVendor, desc.idProduct);
}
printf("\n");
}
static int wince_get_device_list(
struct libusb_context *ctx,
struct discovered_devs **discdevs)
{
UKW_DEVICE devices[MAX_DEVICE_COUNT];
struct discovered_devs * new_devices = *discdevs;
DWORD count = 0, i;
struct libusb_device *dev = NULL;
unsigned char bus_addr, dev_addr;
unsigned long session_id;
BOOL success;
DWORD release_list_offset = 0;
int r = LIBUSB_SUCCESS;
success = UkwGetDeviceList(driver_handle, devices, MAX_DEVICE_COUNT, &count);
if (!success) {
int libusbErr = translate_driver_error(GetLastError());
usbi_err(ctx, "could not get devices: %s", windows_error_str(0));
return libusbErr;
}
for(i = 0; i < count; ++i) {
release_list_offset = i;
success = UkwGetDeviceAddress(devices[i], &bus_addr, &dev_addr, &session_id);
if (!success) {
r = translate_driver_error(GetLastError());
usbi_err(ctx, "could not get device address for %d: %s", i, windows_error_str(0));
goto err_out;
}
dev = usbi_get_device_by_session_id(ctx, session_id);
if (dev) {
usbi_dbg("using existing device for %d/%d (session %ld)",
bus_addr, dev_addr, session_id);
libusb_ref_device(dev);
// Release just this element in the device list (as we already hold a
// reference to it).
UkwReleaseDeviceList(driver_handle, &devices[i], 1);
release_list_offset++;
} else {
usbi_dbg("allocating new device for %d/%d (session %ld)",
bus_addr, dev_addr, session_id);
dev = usbi_alloc_device(ctx, session_id);
if (!dev) {
r = LIBUSB_ERROR_NO_MEM;
goto err_out;
}
r = init_device(dev, devices[i], bus_addr, dev_addr);
if (r < 0)
goto err_out;
r = usbi_sanitize_device(dev);
if (r < 0)
goto err_out;
}
new_devices = discovered_devs_append(new_devices, dev);
if (!discdevs) {
r = LIBUSB_ERROR_NO_MEM;
goto err_out;
}
safe_unref_device(dev);
}
*discdevs = new_devices;
return r;
err_out:
*discdevs = new_devices;
safe_unref_device(dev);
// Release the remainder of the unprocessed device list.
// The devices added to new_devices already will still be passed up to libusb,
// which can dispose of them at its leisure.
UkwReleaseDeviceList(driver_handle, &devices[release_list_offset], count - release_list_offset);
return r;
}
