isc::asiolink::IOService Class Reference

The IOService class is a wrapper for the ASIO io_service class. More...

#include <io_service.h>

Public Member Functions
boost::asio::io_service &	get_io_service ()
	Return the native io_service object used in this wrapper. More...
void	poll ()
	Run the underlying event loop for a ready events. More...
void	post (const std::function< void()> &callback)
	Post a callback to the end of the queue. More...
void	restart ()
	Restarts the IOService in preparation for a subsequent run() invocation. More...
void	run ()
	Start the underlying event loop. More...
void	run_one ()
	Run the underlying event loop for a single event. More...
void	stop ()
	Stop the underlying event loop. More...
bool	stopped () const
	Indicates if the IOService has been stopped. More...
void	stopWork ()
	Removes IO service work object to let it finish running when all handlers have been invoked. More...

Constructors and Destructor
Note: The copy constructor and the assignment operator are intentionally defined as private, making this class non-copyable.
	IOService ()
	The constructor. More...
	~IOService ()
	The destructor. More...

Detailed Description

The IOService class is a wrapper for the ASIO io_service class.

Definition at line 33 of file io_service.h.

Constructor & Destructor Documentation

isc::asiolink::IOService::IOService

(

)

The constructor.

Definition at line 130 of file io_service.cc.

isc::asiolink::IOService::~IOService

(

)

The destructor.

Definition at line 133 of file io_service.cc.

Member Function Documentation

boost::asio::io_service & isc::asiolink::IOService::get_io_service

(

)

Return the native io_service object used in this wrapper.

This is a short term work around to support other Kea modules that share the same io_service with the authoritative server. It will eventually be removed once the wrapper interface is generalized.

Definition at line 172 of file io_service.cc.

Referenced by isc::dhcp_ddns::NameChangeUDPListener::open(), isc::dhcp_ddns::NameChangeUDPSender::open(), and isc::dhcp_ddns::NameChangeSender::runReadyIO().

void isc::asiolink::IOService::poll

(

)

Run the underlying event loop for a ready events.

This method executes handlers for all ready events and returns. It will return immediately if there are no ready events.

Definition at line 147 of file io_service.cc.

void isc::asiolink::IOService::post

(

const std::function< void()> &

callback

)

Post a callback to the end of the queue.

Requests the callback be called sometime later. It is not guaranteed by the underlying asio, but it can reasonably be expected the callback is put to the end of the callback queue. It is not called from within this function.

It may be used to implement "background" work, for example (doing stuff by small bits that are called from time to time).

Definition at line 177 of file io_service.cc.

Referenced by isc::d2::DNSClientImpl::doUpdate().

void isc::asiolink::IOService::restart

(

)

Restarts the IOService in preparation for a subsequent run() invocation.

Definition at line 162 of file io_service.cc.

void isc::asiolink::IOService::run

(

)

Start the underlying event loop.

This method does not return control to the caller until the stop() method is called via some handler.

Definition at line 137 of file io_service.cc.

Referenced by isc::ha::HAService::sendHAReset(), isc::ha::HAService::sendLeaseUpdatesFromBacklog(), and isc::ha::HAService::synchronize().

void isc::asiolink::IOService::run_one

(

)

Run the underlying event loop for a single event.

This method return control to the caller as soon as the first handler has completed. (If no handlers are ready when it is run, it will block until one is.)

Definition at line 142 of file io_service.cc.

void isc::asiolink::IOService::stop

(

)

Stop the underlying event loop.

This will return the control to the caller of the run() method.

Definition at line 152 of file io_service.cc.

Referenced by isc::ha::HAService::sendHAReset(), isc::ha::HAService::sendLeaseUpdatesFromBacklog(), and isc::ha::HAService::synchronize().

bool isc::asiolink::IOService::stopped

(

)

const

Indicates if the IOService has been stopped.

Returns

true if the IOService has been stopped, false otherwise.

Definition at line 157 of file io_service.cc.

void isc::asiolink::IOService::stopWork

(

)

Removes IO service work object to let it finish running when all handlers have been invoked.

Definition at line 167 of file io_service.cc.

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

• io_service.h
• io_service.cc