ssize_t device_write_consumer(gpointer devicep, queue_buffer_t *buffer) {
Device* device;
size_t write_size;
gsize block_size;
device = DEVICE(devicep);
block_size = device->block_size;
write_size = MIN(buffer->data_size, block_size);
/* we assume that the queueing module is providing us with
* appropriately-sized blocks until the last block. */
if (device_write_block(device, write_size,
buffer->data + buffer->offset)) {
/* Success! */
return write_size;
} else {
/* Nope, really an error. */
return -1;
}
}
static gboolean
do_block(
XferDestDevice *self,
guint size,
gpointer data)
{
XferElement *elt = XFER_ELEMENT(self);
if (device_write_block(self->device, size, data) != WRITE_SUCCEED) {
xfer_cancel_with_error(elt, "%s: %s",
self->device->device_name, device_error_or_status(self->device));
wait_until_xfer_cancelled(elt->xfer);
return FALSE;
}
/* check for LEOM */
if (self->cancel_at_leom && self->device->is_eom) {
xfer_cancel_with_error(elt, "%s: LEOM detected", self->device->device_name);
wait_until_xfer_cancelled(elt->xfer);
return FALSE;
}
return TRUE;
}
