Event handler used for unblocking the ACE_Dev_Poll_Reactor from its event loop. More...

#include <Dev_Poll_Reactor.h>

Inheritance diagram for ACE_Dev_Poll_Reactor_Notify:

Collaboration diagram for ACE_Dev_Poll_Reactor_Notify:

Public Member Functions
	ACE_Dev_Poll_Reactor_Notify (void)
	Constructor. More...

Initialization and Termination Methods
Methods called when initializing and terminating this event handler.
ACE_Dev_Poll_Reactor *	dp_reactor_

ACE_Pipe	notification_pipe_

int	max_notify_iterations_

virtual int	open (ACE_Reactor_Impl , ACE_Timer_Queue timer_queue=0, int disable_notify=0)

virtual int	close (void)

virtual int	notify (ACE_Event_Handler eh=0, ACE_Reactor_Mask mask=ACE_Event_Handler::EXCEPT_MASK, ACE_Time_Value timeout=0)

virtual int	dispatch_notifications (int &number_of_active_handles, ACE_Handle_Set &rd_mask)

virtual ACE_HANDLE	notify_handle (void)

virtual int	is_dispatchable (ACE_Notification_Buffer &buffer)
	Verify whether the buffer has dispatchable info or not. More...

virtual int	dispatch_notify (ACE_Notification_Buffer &buffer)

virtual int	read_notify_pipe (ACE_HANDLE handle, ACE_Notification_Buffer &buffer)

virtual int	handle_input (ACE_HANDLE handle)

virtual void	max_notify_iterations (int)

virtual int	max_notify_iterations (void)

virtual int	purge_pending_notifications (ACE_Event_Handler *=0, ACE_Reactor_Mask=ACE_Event_Handler::ALL_EVENTS_MASK)

virtual void	dump (void) const
	Dump the state of an object. More...

int	dequeue_one (ACE_Notification_Buffer &nb)

Additional Inherited Members
Public Types inherited from ACE_Event_Handler
enum	{ LO_PRIORITY = 0, HI_PRIORITY = 10, NULL_MASK = 0, READ_MASK = (1 << 0), WRITE_MASK = (1 << 1), EXCEPT_MASK = (1 << 2), ACCEPT_MASK = (1 << 3), CONNECT_MASK = (1 << 4), TIMER_MASK = (1 << 5), QOS_MASK = (1 << 6), GROUP_QOS_MASK = (1 << 7), SIGNAL_MASK = (1 << 8), ALL_EVENTS_MASK, RWE_MASK, DONT_CALL = (1 << 9) }

enum	{ ACE_EVENT_HANDLER_NOT_RESUMED = -1, ACE_REACTOR_RESUMES_HANDLER = 0, ACE_APPLICATION_RESUMES_HANDLER }

typedef long	Reference_Count
	Reference count type. More...

Static Public Member Functions inherited from ACE_Event_Handler
static ACE_THR_FUNC_RETURN	read_adapter (void *event_handler)

static int	register_stdin_handler (ACE_Event_Handler eh, ACE_Reactor reactor, ACE_Thread_Manager *thr_mgr, int flags=THR_DETACHED)

static int	remove_stdin_handler (ACE_Reactor reactor, ACE_Thread_Manager thr_mgr)
	Performs the inverse of the register_stdin_handler() method. More...

Protected Types inherited from ACE_Event_Handler
typedef ACE_Atomic_Op < ACE_SYNCH_MUTEX, Reference_Count >	Atomic_Reference_Count
	Typedef for implementation of reference counting. More...

Protected Member Functions inherited from ACE_Event_Handler
	ACE_Event_Handler (ACE_Reactor *=0, int priority=ACE_Event_Handler::LO_PRIORITY)
	Force ACE_Event_Handler to be an abstract base class. More...

Protected Attributes inherited from ACE_Event_Handler
Atomic_Reference_Count	reference_count_
	Reference count. More...

Detailed Description

Event handler used for unblocking the ACE_Dev_Poll_Reactor from its event loop.

This event handler is used internally by the ACE_Dev_Poll_Reactor as a means to allow a thread other then the one running the event loop to unblock the event loop.

Constructor & Destructor Documentation

ACE_Dev_Poll_Reactor_Notify::ACE_Dev_Poll_Reactor_Notify ( void )

Constructor.

Member Function Documentation

int ACE_Dev_Poll_Reactor_Notify::close ( void )

virtual

Keep a back pointer to the ACE_Dev_Poll_Reactor. If this value if NULL then the ACE_Dev_Poll_Reactor has been initialized with disable_notify_pipe.

Implements ACE_Reactor_Notify.

int ACE_Dev_Poll_Reactor_Notify::dequeue_one ( ACE_Notification_Buffer & nb )

Method called by ACE_Dev_Poll_Reactor to obtain one notification. THIS METHOD MUST BE CALLED WITH THE REACTOR TOKEN HELD!

Returns

-1 on error, else 0 and

nb has the notify to dispatch. Note that the contained event handler may be 0 if there were only wake-ups (no handlers to dispatch).

int ACE_Dev_Poll_Reactor_Notify::dispatch_notifications	(	int &	number_of_active_handles,
		ACE_Handle_Set &	rd_mask
	)

virtual

Unimplemented method required by pure virtual method in abstract base class. This method's interface is not very compatibile with this Reactor's design. It's not clear why this method is pure virtual either.

Implements ACE_Reactor_Notify.

int ACE_Dev_Poll_Reactor_Notify::dispatch_notify ( ACE_Notification_Buffer & buffer )

virtual

Handle one notify call represented in buffer. This could be because of a thread trying to unblock the Reactor_Impl.

Implements ACE_Reactor_Notify.

void ACE_Dev_Poll_Reactor_Notify::dump ( void ) const

virtual

Dump the state of an object.

Implements ACE_Reactor_Notify.

int ACE_Dev_Poll_Reactor_Notify::handle_input ( ACE_HANDLE handle )

virtual

Called back by the ACE_Dev_Poll_Reactor when a thread wants to unblock us.

Reimplemented from ACE_Event_Handler.

int ACE_Dev_Poll_Reactor_Notify::is_dispatchable ( ACE_Notification_Buffer & buffer )

virtual

Verify whether the buffer has dispatchable info or not.

Implements ACE_Reactor_Notify.

void ACE_Dev_Poll_Reactor_Notify::max_notify_iterations ( int iterations )

virtual

Set the maximum number of times that the handle_input method will iterate and dispatch the ACE_Event_Handlers that are passed in via the notify queue before breaking out of the event loop. By default, this is set to -1, which means "iterate until the queue is empty." Setting this to a value like "1 or 2" will increase "fairness" (and thus prevent starvation) at the expense of slightly higher dispatching overhead.

Implements ACE_Reactor_Notify.

int ACE_Dev_Poll_Reactor_Notify::max_notify_iterations ( void )

virtual

Get the maximum number of times that the handle_input method will iterate and dispatch the ACE_Event_Handlers that are passed in via the notify queue before breaking out of its event loop.

Implements ACE_Reactor_Notify.

int ACE_Dev_Poll_Reactor_Notify::notify	(	ACE_Event_Handler *	eh = `0`,
		ACE_Reactor_Mask	mask = `ACE_Event_Handler::EXCEPT_MASK`,
		ACE_Time_Value *	timeout = `0`
	)

virtual

Called by a thread when it wants to unblock the Reactor_Impl. This wakes up the Reactor_Impl if currently blocked. Pass over both the Event_Handler and the mask to allow the caller to dictate which Event_Handler method the Reactor_Impl will invoke. The ACE_Time_Value indicates how long to block trying to notify the Reactor_Impl. If timeout == 0, the caller will block until action is possible, else will wait until the relative time specified in *timeout elapses).

Implements ACE_Reactor_Notify.

ACE_HANDLE ACE_Dev_Poll_Reactor_Notify::notify_handle ( void )

virtual

Returns the ACE_HANDLE of the notify pipe on which the reactor is listening for notifications so that other threads can unblock the Reactor_Impl.

Implements ACE_Reactor_Notify.

int ACE_Dev_Poll_Reactor_Notify::open	(	ACE_Reactor_Impl *	r,
		ACE_Timer_Queue *	timer_queue = `0`,
		int	disable_notify = `0`
	)

virtual

Keep a back pointer to the ACE_Dev_Poll_Reactor. If this value if NULL then the ACE_Dev_Poll_Reactor has been initialized with disable_notify_pipe.

Implements ACE_Reactor_Notify.

int ACE_Dev_Poll_Reactor_Notify::purge_pending_notifications	(	ACE_Event_Handler *	eh = `0`,
		ACE_Reactor_Mask	mask = `ACE_Event_Handler::ALL_EVENTS_MASK`
	)

virtual

Purge any notifications pending in this reactor for the specified ACE_Event_Handler object. Returns the number of notifications purged. Returns -1 on error.

Implements ACE_Reactor_Notify.

int ACE_Dev_Poll_Reactor_Notify::read_notify_pipe	(	ACE_HANDLE	handle,
		ACE_Notification_Buffer &	buffer
	)

virtual

Read one notify call on the handle into buffer. This could be because of a thread trying to unblock the Reactor_Impl.

Implements ACE_Reactor_Notify.

Member Data Documentation

ACE_Dev_Poll_Reactor* ACE_Dev_Poll_Reactor_Notify::dp_reactor_

protected

Keep a back pointer to the ACE_Dev_Poll_Reactor. If this value if NULL then the ACE_Dev_Poll_Reactor has been initialized with disable_notify_pipe.

int ACE_Dev_Poll_Reactor_Notify::max_notify_iterations_

protected

Keeps track of the maximum number of times that the ACE_Dev_Poll_Reactor_Notify::handle_input method will iterate and dispatch the ACE_Event_Handlers that are passed in via the notify pipe before breaking out of its recv loop. By default, this is set to -1, which means "iterate until the pipe is empty."

ACE_Pipe ACE_Dev_Poll_Reactor_Notify::notification_pipe_

protected

Contains the ACE_HANDLE the ACE_Dev_Poll_Reactor is listening on, as well as the ACE_HANDLE that threads wanting the attention of the ACE_Dev_Poll_Reactor will write to.

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

Public Member Functions

Initialization and Termination Methods

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation