Unblock the ACE_Select_Reactor from its event loop. More...

#include <Select_Reactor_Base.h>

Inheritance diagram for ACE_Select_Reactor_Notify:

Collaboration diagram for ACE_Select_Reactor_Notify:

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

virtual	~ACE_Select_Reactor_Notify (void)
	Destructor. More...

virtual int	open (ACE_Reactor_Impl , ACE_Timer_Queue =0, int disable_notify_pipe=ACE_DISABLE_NOTIFY_PIPE_DEFAULT)
	Initialize. More...

virtual int	close (void)
	Destroy. More...

virtual int	notify (ACE_Event_Handler =0, ACE_Reactor_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	dispatch_notify (ACE_Notification_Buffer &buffer)

virtual int	read_notify_pipe (ACE_HANDLE handle, ACE_Notification_Buffer &buffer)

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

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 *sh, ACE_Reactor_Mask mask=ACE_Event_Handler::ALL_EVENTS_MASK)

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

Public Attributes
	ACE_ALLOC_HOOK_DECLARE
	Declare the dynamic allocation hooks. More...

Protected Attributes
ACE_Select_Reactor_Impl *	select_reactor_

ACE_Pipe	notification_pipe_

int	max_notify_iterations_

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...

Detailed Description

Unblock the ACE_Select_Reactor from its event loop.

This implementation is necessary for cases where the ACE_Select_Reactor is run in a multi-threaded program. In this case, we need to be able to unblock select or poll when updates occur other than in the main ACE_Select_Reactor thread. To do this, we signal an auto-reset event the ACE_Select_Reactor is listening on. If an ACE_Event_Handler and ACE_Select_Reactor_Mask is passed to notify, the appropriate handle_* method is dispatched in the context of the ACE_Select_Reactor thread.

Constructor & Destructor Documentation

ACE_Select_Reactor_Notify::ACE_Select_Reactor_Notify ( void )

Constructor.

ACE_Select_Reactor_Notify::~ACE_Select_Reactor_Notify ( void )

virtual

Destructor.

Member Function Documentation

int ACE_Select_Reactor_Notify::close ( void )

virtual

Destroy.

Implements ACE_Reactor_Notify.

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

virtual

Handles pending threads (if any) that are waiting to unblock the ACE_Select_Reactor.

Implements ACE_Reactor_Notify.

int ACE_Select_Reactor_Notify::dispatch_notify ( ACE_Notification_Buffer & buffer )

virtual

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

Implements ACE_Reactor_Notify.

void ACE_Select_Reactor_Notify::dump ( void ) const

virtual

Dump the state of an object.

Implements ACE_Reactor_Notify.

int ACE_Select_Reactor_Notify::handle_input ( ACE_HANDLE handle )

virtual

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

Reimplemented from ACE_Event_Handler.

int ACE_Select_Reactor_Notify::is_dispatchable ( ACE_Notification_Buffer & buffer )

virtual

Verify whether the buffer has dispatchable info or not.

Implements ACE_Reactor_Notify.

void ACE_Select_Reactor_Notify::max_notify_iterations ( int iterations )

virtual

Set the maximum number of times that the ACE_Select_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." 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_Select_Reactor_Notify::max_notify_iterations ( void )

virtual

Get the maximum number of times that the ACE_Select_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.

Implements ACE_Reactor_Notify.

int ACE_Select_Reactor_Notify::notify	(	ACE_Event_Handler *	event_handler = `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 ACE_Select_Reactor. This wakeups the ACE_Select_Reactor if currently blocked in select/poll. Pass over both the Event_Handler and the mask to allow the caller to dictate which Event_Handler method the ACE_Select_Reactor will invoke. The ACE_Time_Value indicates how long to blocking trying to notify the ACE_Select_Reactor. 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_Select_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 Select_Reactor

Implements ACE_Reactor_Notify.

int ACE_Select_Reactor_Notify::open	(	ACE_Reactor_Impl *	r,
		ACE_Timer_Queue *	= `0`,
		int	disable_notify_pipe = `ACE_DISABLE_NOTIFY_PIPE_DEFAULT`
	)

virtual

Initialize.

Implements ACE_Reactor_Notify.

int ACE_Select_Reactor_Notify::purge_pending_notifications	(	ACE_Event_Handler *	sh,
		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. If eh == 0, all notifications for all handlers are removed (but not any notifications posted just to wake up the reactor itself). Returns the number of notifications purged. Returns -1 on error.

Implements ACE_Reactor_Notify.

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

virtual

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

Return value semantics for this are: -1: nothing read, fatal, unrecoverable error 0: nothing read at all 1: complete buffer read

Implements ACE_Reactor_Notify.

Member Data Documentation

ACE_Select_Reactor_Notify::ACE_ALLOC_HOOK_DECLARE

Declare the dynamic allocation hooks.

int ACE_Select_Reactor_Notify::max_notify_iterations_

protected

Keeps track of the maximum number of times that the ACE_Select_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_Select_Reactor_Notify::notification_pipe_

protected

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

ACE_Select_Reactor_Impl* ACE_Select_Reactor_Notify::select_reactor_

protected

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

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

Public Member Functions

Public Attributes

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation