Reads a 64-bit/8-byte value from stream.
In order to get the correct byte order for this read operation, see DataInputStream.getByteOrder and DataInputStream.setByteOrder.
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.
a signed 64-bit/8-byte value read from stream or 0 if an error occurred.
GException on failure.
Reads a 64-bit/8-byte value from stream.
In order to get the correct byte order for this read operation, see DataInputStream.getByteOrder and DataInputStream.setByteOrder.
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.