#include <Select_Reactor_Base.h>
Public Member Functions | |
ACE_Select_Reactor_Notify (void) | |
Constructor. | |
virtual | ~ACE_Select_Reactor_Notify (void) |
Destructor. | |
virtual int | open (ACE_Reactor_Impl *, ACE_Timer_Queue *=0, int disable_notify_pipe=ACE_DISABLE_NOTIFY_PIPE_DEFAULT) |
Initialize. | |
virtual int | close (void) |
Destroy. | |
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. | |
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. | |
Public Attributes | |
ACE_ALLOC_HOOK_DECLARE | |
Declare the dynamic allocation hooks. | |
Protected Attributes | |
ACE_Select_Reactor_Impl * | select_reactor_ |
ACE_Pipe | notification_pipe_ |
int | max_notify_iterations_ |
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.
ACE_Select_Reactor_Notify::ACE_Select_Reactor_Notify | ( | void | ) |
Constructor.
ACE_Select_Reactor_Notify::~ACE_Select_Reactor_Notify | ( | void | ) | [virtual] |
Destructor.
int ACE_Select_Reactor_Notify::close | ( | void | ) | [virtual] |
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] |
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] |
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.
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::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] |
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
Implements ACE_Reactor_Notify.
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."
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.
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.