118         libusb_transfer* transfer = nullptr;  member
125         libusb_transfer* transfer;  member
145         libusb_free_transfer(read_block->transfer);  in Cleanup()
147         read_block->transfer = nullptr;  in Cleanup()
155         CHECK(read_block->transfer);  in MaybeCleanup()
165     static void LIBUSB_CALL header_read_cb(libusb_transfer* transfer) {  in header_read_cb()
166         auto read_block = static_cast<ReadBlock*>(transfer->user_data);  in header_read_cb()
175         if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {  in header_read_cb()
176             std::string msg = StringPrintf("usb read failed: status = %d", transfer->status);  in header_read_cb()
185         if (transfer->actual_length != sizeof(amessage)) {  in header_read_cb()
187                                            transfer->actual_length);  in header_read_cb()
196         memcpy(&amsg, transfer->buffer, sizeof(amsg));  in header_read_cb()
215     static void LIBUSB_CALL payload_read_cb(libusb_transfer* transfer) {  in payload_read_cb()
216         auto read_block = static_cast<ReadBlock*>(transfer->user_data);  in payload_read_cb()
224         if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {  in payload_read_cb()
225             std::string msg = StringPrintf("usb read failed: status = %d", transfer->status);  in payload_read_cb()
234         if (transfer->actual_length != transfer->length) {  in payload_read_cb()
237                                  transfer->length, transfer->actual_length);  in payload_read_cb()
252     static void LIBUSB_CALL write_cb(libusb_transfer* transfer) {  in write_cb()
253         auto write_block = static_cast<WriteBlock*>(transfer->user_data);  in write_cb()
256         bool succeeded = transfer->status == LIBUSB_TRANSFER_COMPLETED;  in write_cb()
260             libusb_free_transfer(transfer);  in write_cb()
280         read->transfer = libusb_alloc_transfer(0);  in CreateRead()
281         if (!read->transfer) {  in CreateRead()
284         libusb_fill_bulk_transfer(read->transfer, device_handle_.get(), read_endpoint_, nullptr, 0,  in CreateRead()
290         read->transfer->buffer = reinterpret_cast<unsigned char*>(read->block.data());  in SubmitRead()
291         read->transfer->length = length;  in SubmitRead()
293         int rc = libusb_submit_transfer(read->transfer);  in SubmitRead()
306         write->transfer = libusb_alloc_transfer(0);  in SubmitWrite()
307         if (!write->transfer) {  in SubmitWrite()
311         libusb_fill_bulk_transfer(write->transfer, device_handle_.get(), write_endpoint_,  in SubmitWrite()
314         int rc = libusb_submit_transfer(write->transfer);  in SubmitWrite()
319             libusb_free_transfer(write->transfer);  in SubmitWrite()
648         if (!read_block->transfer) {  in CancelReadTransfer()
658         int rc = libusb_cancel_transfer(read_block->transfer);  in CancelReadTransfer()
691                 int rc = libusb_cancel_transfer(write_block->transfer);  in CloseDevice()
697                     libusb_free_transfer(write_block->transfer);  in CloseDevice()