glibmm: Gio::UnixFDList Class Reference

UnixFDList - An object containing a set of UNIX file descriptors. More...

#include <giomm/unixfdlist.h>

Inheritance diagram for Gio::UnixFDList:

[legend]

Public Member Functions
	UnixFDList (UnixFDList &&src) noexcept

UnixFDList &	operator= (UnixFDList &&src) noexcept

	~UnixFDList () noexcept override

GUnixFDList *	gobj ()
	Provides access to the underlying C GObject.

const GUnixFDList *	gobj () const
	Provides access to the underlying C GObject.

GUnixFDList *	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

int	get_length () const
	Gets the length of list (ie: the number of file descriptors contained within).

int	get (int index) const
	Gets a file descriptor out of list.

const std::vector< int >	peek_fds () const
	Returns the array of file descriptors that is contained in this object.

std::vector< int >	steal_fds ()
	Returns the array of file descriptors that is contained in this object.

int	append (int fd)
	Adds a file descriptor to list.

Public Member Functions inherited from Glib::Object
	Object (const Object &)=delete

Object &	operator= (const Object &)=delete

	Object (Object &&src) noexcept

Object &	operator= (Object &&src) noexcept

void *	get_data (const QueryQuark & key)

void	set_data (const Quark & key, void *data)

void	set_data_with_c_callback (const Quark & key, void *data, GDestroyNotify notify)

void	set_data (const Quark & key, void *data, DestroyNotify notify)
	Prefer set_data_with_c_callback() with a callback with C linkage.

void	remove_data (const QueryQuark &quark)

void *	steal_data (const QueryQuark &quark)

Public Member Functions inherited from Glib::ObjectBase
	ObjectBase (const ObjectBase &)=delete

ObjectBase &	operator= (const ObjectBase &)=delete

void	set_property_value (const Glib::ustring & property_name, const Glib::ValueBase & value)
	You probably want to use a specific property_*() accessor method instead.

void	get_property_value (const Glib::ustring & property_name, Glib::ValueBase & value) const
	You probably want to use a specific property_*() accessor method instead.

template<class PropertyType >
void	set_property (const Glib::ustring & property_name, const PropertyType & value)
	You probably want to use a specific property_*() accessor method instead.

template<class PropertyType >
void	get_property (const Glib::ustring & property_name, PropertyType & value) const
	You probably want to use a specific property_*() accessor method instead.

template<class PropertyType >
PropertyType	get_property (const Glib::ustring & property_name) const
	You probably want to use a specific property_*() accessor method instead.

sigc::connection	connect_property_changed (const Glib::ustring & property_name, const sigc::slot< void()> &slot)
	You can use the signal_changed() signal of the property proxy instead.

sigc::connection	connect_property_changed (const Glib::ustring & property_name, sigc::slot< void()> &&slot)
	You can use the signal_changed() signal of the property proxy instead.

void	freeze_notify ()
	Increases the freeze count on object.

void	thaw_notify ()
	Reverts the effect of a previous call to freeze_notify().

virtual void	reference () const
	Increment the reference count for this object.

virtual void	unreference () const
	Decrement the reference count for this object.

GObject *	gobj ()
	Provides access to the underlying C GObject.

const GObject *	gobj () const
	Provides access to the underlying C GObject.

GObject *	gobj_copy () const
	Give a ref-ed copy to someone. Use for direct struct access.

Static Public Member Functions
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system.

static Glib::RefPtr< UnixFDList >	create ()
	Creates a new UnixFDList containing no file descriptors.

static Glib::RefPtr< UnixFDList >	create (const std::vector< int > &fds)
	Creates a new UnixFDList containing the file descriptors given in fds.

static Glib::RefPtr< UnixFDList >	create (const std::vector< int > &fds, int n_fds)
	Creates a new UnixFDList containing the file descriptors given in fds.

Protected Member Functions
	UnixFDList ()

	UnixFDList (const std::vector< int > &fds)

	UnixFDList (const std::vector< int > &fds, int n_fds)

Protected Member Functions inherited from Glib::Object
	Object ()

	Object (const Glib::ConstructParams &construct_params)

	Object (GObject *castitem)

	~Object () noexcept override

Protected Member Functions inherited from Glib::ObjectBase
	ObjectBase ()
	This default constructor is called implicitly from the constructor of user-derived classes, even if, for instance, Gtk::Button calls a different ObjectBase constructor.

	ObjectBase (const char *custom_type_name)
	A derived constructor always overrides this choice.

	ObjectBase (const std::type_info &custom_type_info)
	This constructor is a special feature to allow creation of derived types on the fly, without having to use g_object_new() manually.

	ObjectBase (ObjectBase &&src) noexcept

ObjectBase &	operator= (ObjectBase &&src) noexcept

virtual	~ObjectBase () noexcept=0

void	initialize (GObject *castitem)

void	initialize_move (GObject castitem, Glib::ObjectBase previous_wrapper)

Related Symbols
(Note that these are not member symbols.)
Glib::RefPtr< Gio::UnixFDList >	wrap (GUnixFDList *object, bool take_copy=false)
	A Glib::wrap() method for this object.

Related Symbols inherited from Glib::Object
Glib::RefPtr< Glib::Object >	wrap (GObject *object, bool take_copy=false)

Additional Inherited Members
Public Types inherited from Glib::Object
using	DestroyNotify = void(*)(gpointer data)

Detailed Description

UnixFDList - An object containing a set of UNIX file descriptors.

A UnixFDList contains a list of file descriptors. It owns the file descriptors that it contains, closing them when finalized.

It may be wrapped in a UnixFDMessage and sent over a Socket in the G_SOCKET_ADDRESS_UNIX family by using Gio::Socket::send() and received using Gio::Socket::receive().

Since glibmm 2.28:

Constructor & Destructor Documentation

◆ UnixFDList() [1/4]

Gio::UnixFDList::UnixFDList ( UnixFDList && src )

noexcept

◆ ~UnixFDList()

Gio::UnixFDList::~UnixFDList ( )

overridenoexcept

◆ UnixFDList() [2/4]

Gio::UnixFDList::UnixFDList ( )

protected

◆ UnixFDList() [3/4]

Gio::UnixFDList::UnixFDList ( const std::vector< int > & fds )

explicitprotected

◆ UnixFDList() [4/4]

Gio::UnixFDList::UnixFDList	(	const std::vector< int > &	fds,
		int	n_fds
	)

explicitprotected

Member Function Documentation

◆ append()

int Gio::UnixFDList::append ( int fd )

Adds a file descriptor to list.

The file descriptor is duplicated using dup(). You keep your copy of the descriptor and the copy contained in list will be closed when list is finalized.

A possible cause of failure is exceeding the per-process or system-wide file descriptor limit.

The index of the file descriptor in the list is returned. If you use this index with g_unix_fd_list_get() then you will receive back a duplicated copy of the same file descriptor.

Since glibmm 2.24:

Parameters

fd	A valid open file descriptor.

Returns: The index of the appended fd in case of success, else -1 (and error is set).

Exceptions

Glib::Error.

◆ create() [1/3]

static Glib::RefPtr< UnixFDList > Gio::UnixFDList::create ( )

static

Creates a new UnixFDList containing no file descriptors.

Since glibmm 2.24:

Returns: A new UnixFDList.

◆ create() [2/3]

static Glib::RefPtr< UnixFDList > Gio::UnixFDList::create ( const std::vector< int > & fds )

static

Creates a new UnixFDList containing the file descriptors given in fds.

The file descriptors become the property of the new list and may no longer be used by the caller. The array itself is owned by the caller.

Each file descriptor in the array should be set to close-on-exec.

Parameters

fds	The list of file descriptors to use for creation.

Returns: A new UnixFDList.

◆ create() [3/3]

static Glib::RefPtr< UnixFDList > Gio::UnixFDList::create	(	const std::vector< int > &	fds,
		int	n_fds
	)

static

Creates a new UnixFDList containing the file descriptors given in fds.

The file descriptors become the property of the new list and may no longer be used by the caller. The array itself is owned by the caller.

Each file descriptor in the array should be set to close-on-exec.

If n_fds is -1 then fds must be terminated with -1.

Since glibmm 2.24:

Parameters

fds	The initial list of file descriptors.
n_fds	The length of fds, or -1.

Returns: A new UnixFDList.

◆ get()

int Gio::UnixFDList::get ( int index ) const

Gets a file descriptor out of list.

index specifies the index of the file descriptor to get. It is a programmer error for index to be out of range; see g_unix_fd_list_get_length().

The file descriptor is duplicated using dup() and set as close-on-exec before being returned. You must call close() on it when you are done.

A possible cause of failure is exceeding the per-process or system-wide file descriptor limit.

Since glibmm 2.24:

Parameters

index The index into the list.

Returns: The file descriptor, or -1 in case of error.

Exceptions

Gio::Error

◆ get_length()

int Gio::UnixFDList::get_length ( ) const

Gets the length of list (ie: the number of file descriptors contained within).

Since glibmm 2.24:

Returns: The length of list.

◆ get_type()

static GType Gio::UnixFDList::get_type ( )

static

Get the GType for this class, for use with the underlying GObject type system.

◆ gobj() [1/2]

GUnixFDList * Gio::UnixFDList::gobj ( )

inline

Provides access to the underlying C GObject.

◆ gobj() [2/2]

const GUnixFDList * Gio::UnixFDList::gobj ( ) const

inline

Provides access to the underlying C GObject.

◆ gobj_copy()

GUnixFDList * Gio::UnixFDList::gobj_copy ( )

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

◆ operator=()

UnixFDList & Gio::UnixFDList::operator= ( UnixFDList && src )

noexcept

◆ peek_fds()

const std::vector< int > Gio::UnixFDList::peek_fds ( ) const

Returns the array of file descriptors that is contained in this object.

After this call, the descriptors remain the property of the list. The caller must not close them. The array is valid only until list is changed in any way.

Returns: The list of file descriptors.

Since glibmm 2.28:

◆ steal_fds()

std::vector< int > Gio::UnixFDList::steal_fds ( )

Returns the array of file descriptors that is contained in this object.

After this call, the descriptors are no longer contained in the list. Further calls will return an empty list (unless more descriptors have been added).

The caller is responsible for closing all of the file descriptors. The file descriptors in the array are set to close-on-exec.

Returns: The list of file descriptors.

Since glibmm 2.28:

Friends And Related Symbol Documentation

◆ wrap()

Glib::RefPtr< Gio::UnixFDList > wrap	(	GUnixFDList *	object,
		bool	take_copy = `false`
	)

A Glib::wrap() method for this object.

Parameters

object	The C instance.
take_copy	False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns: A C++ instance that wraps this C instance.

Public Member Functions

Static Public Member Functions

Protected Member Functions

Related Symbols

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ UnixFDList() [1/4]

◆ ~UnixFDList()

◆ UnixFDList() [2/4]

◆ UnixFDList() [3/4]

◆ UnixFDList() [4/4]

Member Function Documentation

◆ append()

◆ create() [1/3]

◆ create() [2/3]

◆ create() [3/3]

◆ get()

◆ get_length()

◆ get_type()

◆ gobj() [1/2]

◆ gobj() [2/2]

◆ gobj_copy()

◆ operator=()

◆ peek_fds()

◆ steal_fds()

Friends And Related Symbol Documentation

◆ wrap()