ieee1284_ref - modify a port's reference count

NAME SYNOPSIS DESCRIPTION RETURN VALUE SEE ALSO AUTHOR COPYRIGHT

NAME

ieee1284_ref, ieee1284_unref − modify a port’s reference count

SYNOPSIS

#include <ieee1284.h>

	int ieee1284_ref(struct parport *port);
	int ieee1284_unref(struct parport *port);

If you want to free the port list from ieee1284_find_ports but open one of the ports later on, you will need to prevent it from being destroyed in ieee1284_free_ports. Each port has a reference count, and you can use ieee1284_ref to increment it and ieee1284_unref to decrement it.

If you use ieee1284_ref at any stage, you must later call ieee1284_unref to relinquish the extra reference. If you do not do this, the resources associated with the port will not be cleaned up.

If you have not previously used ieee1284_ref on a port, you must not use ieee1284_unref on it.