Reads an unsigned 64-bit/8-byte value from stream.
In order to get the correct byte order for this read operation, see DataInputStream.getByteOrder.
If cancellable is not NULL, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error G_IO_ERROR_CANCELLED will be returned.
optional gio.Cancellable object, NULL to ignore.
an unsigned 64-bit/8-byte read from stream or 0 if an error occurred.
GException on failure.
Reads an unsigned 64-bit/8-byte value from stream.
In order to get the correct byte order for this read operation, see DataInputStream.getByteOrder.
If cancellable is not NULL, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error G_IO_ERROR_CANCELLED will be returned.