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io_handler Class Reference

Inherited by io_event_loop::wake_handler, net_handler< Lock > [private], tcp_acceptor< T, Arg > [private], and term_handler [private].

List of all members.

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Detailed Description

A handler that receives notifications on events on a file descriptor.

The subclass may call want_read(bool) to enable/disable read events, and want_write(bool) to enable/disable write events.

Handlers are only active when attached to both an event loop (via the constructor or set_loop) and a file descriptor (via the constructor or set_ioh()).

Public Methods
void	set_loop (io_event_loop &_loop)
	Attaches the handler to an event loop.
io_event_loop *	get_loop ()
	Returns the event loop to which the handler is attached.
bool	is_owned ()
	Should this handler refrain from deleting itself on connection close?
void	set_owned (bool o)
	Should this handler refrain from deleting itself on connection close?
iohandle	get_ioh ()
	Returns the file descriptor to which the handler is attached.
Protected Methods
	io_handler (iohandle ioh=iohandle())
	Constructor.
	io_handler (io_event_loop &loop, iohandle ioh=iohandle(), bool owned=false)
	Constructor.
virtual	~io_handler ()
	Destructor.
void	set_ioh (iohandle ioh)
	Attaches the handler to a file descriptor.
virtual void	ravail ()
	Called by the event loop when bytes are available on the file descriptor (if want_read(true) has been called).
virtual void	wavail ()
	Called by the event loop when bytes may be written on the file descriptor (if want_write(true) has been called).
void	want_read (bool)
	Invoked by the subclass to signal interest in read availability.
void	want_write (bool)
	Invoked by the subclass to signal interest in write availability.
Friends
class	io_event_loop

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Constructor & Destructor Documentation

io_handler::io_handler (  iohandle    ioh = iohandle() )  [protected]

Constructor.

io_handler::io_handler (  io_event_loop &    loop, iohandle    ioh = iohandle(), bool    owned = false )  [protected]

Constructor.

virtual io_handler::~io_handler (    )  [protected, virtual]

Destructor.

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Member Function Documentation

iohandle io_handler::get_ioh (    )

Returns the file descriptor to which the handler is attached.

io_event_loop* io_handler::get_loop (    )

Returns the event loop to which the handler is attached.

bool io_handler::is_owned (    )

Should this handler refrain from deleting itself on connection close?

virtual void io_handler::ravail (    )  [protected, virtual]

Called by the event loop when bytes are available on the file descriptor (if want_read(true) has been called).

void io_handler::set_ioh (  iohandle    ioh )  [protected]

Attaches the handler to a file descriptor.

void io_handler::set_loop (  io_event_loop &    _loop )

Attaches the handler to an event loop.

void io_handler::set_owned (  bool    o )

Should this handler refrain from deleting itself on connection close?

void io_handler::want_read (  bool    )  [protected]

Invoked by the subclass to signal interest in read availability.

void io_handler::want_write (  bool    )  [protected]

Invoked by the subclass to signal interest in write availability.

virtual void io_handler::wavail (    )  [protected, virtual]

Called by the event loop when bytes may be written on the file descriptor (if want_write(true) has been called).

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Friends And Related Function Documentation

friend class io_event_loop [friend]

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The documentation for this class was generated from the following file:

• ioevent

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