Man page - ieee1284_unref(3)
Packages contas this manual
- ieee1284_ecp_write_data(3)
- ieee1284_ref(3)
- ieee1284_ecp_read_addr(3)
- ieee1284_do_nack_handshake(3)
- ieee1284_negotiate(3)
- ieee1284_find_ports(3)
- ieee1284_nibble_read(3)
- ieee1284_write_data(3)
- ieee1284_byte_read(3)
- libieee1284(3)
- ieee1284_ecp_write_addr(3)
- ieee1284_read_status(3)
- parport_list(3)
- ieee1284_ecp_fwd_to_rev(3)
- ieee1284_close(3)
- ieee1284_epp_read_addr(3)
- ieee1284_epp_read_data(3)
- ieee1284_data_dir(3)
- ieee1284_read_control(3)
- ieee1284_free_ports(3)
- ieee1284_compat_write(3)
- ieee1284_set_timeout(3)
- ieee1284_frob_control(3)
- ieee1284_terminate(3)
- ieee1284_claim(3)
- ieee1284_wait_status(3)
- ieee1284_read_data(3)
- ieee1284_ecp_rev_to_fwd(3)
- ieee1284_epp_write_data(3)
- ieee1284_write_control(3)
- ieee1284_get_deviceid(3)
- ieee1284_unref(3)
- ieee1284_release(3)
- ieee1284_get_irq_fd(3)
- ieee1284_open(3)
- ieee1284_ecp_read_data(3)
- parport(3)
- ieee1284_wait_data(3)
- ieee1284_epp_write_addr(3)
apt-get install libieee1284-3-dev
Manual
| IEEE1284_REF(3) | Functions | IEEE1284_REF(3) |
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);
DESCRIPTION
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.
RETURN VALUE
These functions return the number of references held after the increment or decrement.
SEE ALSO
ieee1284_open(3)
AUTHOR
Tim Waugh <twaugh@redhat.com>
- Author.
COPYRIGHT
Copyright © 2001-2003 Tim Waugh
| 09/18/2007 |