# ACE_Dev_Poll_Reactor Class Reference

A `/dev/poll' or `/dev/epoll' based Reactor implemenatation. More...

`#include <Dev_Poll_Reactor.h>`

Inheritance diagram for ACE_Dev_Poll_Reactor:

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Collaboration diagram for ACE_Dev_Poll_Reactor:

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List of all members.

## Public Member Functions

| ACE_Dev_Poll_Reactor (ACE_Sig_Handler *=0, ACE_Timer_Queue *=0, int disable_notify_pipe=0, ACE_Reactor_Notify *notify=0, int mask_signals=1, int s_queue=ACE_DEV_POLL_TOKEN::FIFO)
| Initialize `ACE_Dev_Poll_Reactor` with the default size.
| ACE_Dev_Poll_Reactor (size_t size, int restart=0, ACE_Sig_Handler *=0, ACE_Timer_Queue *=0, int disable_notify_pipe=0, ACE_Reactor_Notify *notify=0, int mask_signals=1, int s_queue=ACE_DEV_POLL_TOKEN::FIFO)
| Initialize ACE_Dev_Poll_Reactor with size size.
virtual | ~ACE_Dev_Poll_Reactor (void)
| Close down and release all resources.
virtual int | open (size_t size, int restart=0, ACE_Sig_Handler *=0, ACE_Timer_Queue *=0, int disable_notify_pipe=0, ACE_Reactor_Notify *=0)
| Initialization.
virtual int | current_info (ACE_HANDLE handle, size_t &)
virtual int | set_sig_handler (ACE_Sig_Handler *signal_handler)
| Use a user specified signal handler instead.
virtual int | timer_queue (ACE_Timer_Queue *tq)
| Set a user-specified timer queue.
virtual ACE_Timer_Queue * | timer_queue (void) const
virtual int | close (void)
| Close down and release all resources.
virtual int | work_pending (const ACE_Time_Value &max_wait_time=ACE_Time_Value::zero)
virtual int | handle_events (ACE_Time_Value *max_wait_time=0)
virtual int | alertable_handle_events (ACE_Time_Value *max_wait_time=0)
virtual int | handle_events (ACE_Time_Value &max_wait_time)
virtual int | alertable_handle_events (ACE_Time_Value &max_wait_time)
virtual int | deactivated (void)
virtual void | deactivate (int do_stop)
virtual int | register_handler (ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask)
virtual int | register_handler (ACE_HANDLE io_handle, ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask)
virtual int | register_handler (ACE_HANDLE event_handle, ACE_HANDLE io_handle, ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask)
virtual int | register_handler (const ACE_Handle_Set &handles, ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask)
virtual int | register_handler (int signum, ACE_Event_Handler *new_sh, ACE_Sig_Action *new_disp=0, ACE_Event_Handler **old_sh=0, ACE_Sig_Action *old_disp=0)
virtual int | register_handler (const ACE_Sig_Set &sigset, ACE_Event_Handler *new_sh, ACE_Sig_Action *new_disp=0)
virtual int | remove_handler (ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask)
| Removes event_handler.
virtual int | remove_handler (ACE_HANDLE handle, ACE_Reactor_Mask mask)
virtual int | remove_handler (const ACE_Handle_Set &handle_set, ACE_Reactor_Mask mask)
virtual int | remove_handler (int signum, ACE_Sig_Action *new_disp, ACE_Sig_Action *old_disp=0, int sigkey=-1)
virtual int | remove_handler (const ACE_Sig_Set &sigset)
| Calls <remove_handler> for every signal in <sigset>.
virtual int | suspend_handler (ACE_Event_Handler *event_handler)
virtual int | suspend_handler (ACE_HANDLE handle)
| Suspend handle temporarily.
virtual int | suspend_handler (const ACE_Handle_Set &handles)
| Suspend all handles in handle set temporarily.
virtual int | suspend_handlers (void)
| Suspend all handles temporarily.
virtual int | resume_handler (ACE_Event_Handler *event_handler)
virtual int | resume_handler (ACE_HANDLE handle)
| Resume handle.
virtual int | resume_handler (const ACE_Handle_Set &handles)
| Resume all handles in handle set.
virtual int | resume_handlers (void)
| Resume all handles.
virtual int | resumable_handler (void)
virtual int | uses_event_associations (void)
virtual long | schedule_timer (ACE_Event_Handler *event_handler, const void *arg, const ACE_Time_Value &delay, const ACE_Time_Value &interval=ACE_Time_Value::zero)
virtual int | reset_timer_interval (long timer_id, const ACE_Time_Value &interval)
virtual int | cancel_timer (ACE_Event_Handler *event_handler, int dont_call_handle_close=1)
virtual int | cancel_timer (long timer_id, const void **arg=0, int dont_call_handle_close=1)
virtual int | schedule_wakeup (ACE_Event_Handler *event_handler, ACE_Reactor_Mask masks_to_be_added)
virtual int | schedule_wakeup (ACE_HANDLE handle, ACE_Reactor_Mask masks_to_be_added)
virtual int | cancel_wakeup (ACE_Event_Handler *event_handler, ACE_Reactor_Mask masks_to_be_cleared)
| Clear <masks_to_be_cleared> from the <event_handler>'s entry.
virtual int | cancel_wakeup (ACE_HANDLE handle, ACE_Reactor_Mask masks_to_be_cleared)
| Clear <masks_to_be_cleared> from the <handle>'s entry.
virtual int | notify (ACE_Event_Handler *event_handler=0, ACE_Reactor_Mask mask=ACE_Event_Handler::EXCEPT_MASK, ACE_Time_Value *=0)
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 ACE_Event_Handler * | find_handler (ACE_HANDLE handle)
virtual int | handler (ACE_HANDLE handle, ACE_Reactor_Mask mask, ACE_Event_Handler **event_handler=0)
virtual int | handler (int signum, ACE_Event_Handler **=0)
virtual int | initialized (void)
virtual size_t | size (void) const
virtual ACE_Lock & | lock (void)
| Returns a reference to the Reactor's internal lock.
virtual void | wakeup_all_threads (void)
| Wake up all threads waiting in the event loop.
virtual int | owner (ACE_thread_t new_owner, ACE_thread_t *old_owner=0)
| Transfers ownership of Reactor_Impl to the new_owner.
virtual int | owner (ACE_thread_t *owner)
| Return the ID of the "owner" thread.
virtual int | restart (void)
| Get the existing restart value.
virtual int | restart (int r)
| Set a new value for restart and return the original value.
virtual void | requeue_position (int)
| Set position of the owner thread.
virtual int | requeue_position (void)
| Get position of the owner thread.
virtual void | dump (void) const
| Dump the state of an object.
Low-level wait_set mask manipulation methods

Low-level methods to manipulate the event/reactor mask associated with a handle and event handler when polling for events.

  The "interest set," i.e. the wait set, can be directly manipulated with these methods.

virtual int | mask_ops (ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask, int ops)
virtual int | mask_ops (ACE_HANDLE handle, ACE_Reactor_Mask mask, int ops)
Low-level ready_set mask manipulation methods
These methods are unimplemented.
virtual int | ready_ops (ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask, int ops)
virtual int | ready_ops (ACE_HANDLE handle, ACE_Reactor_Mask, int ops)
| GET/SET/ADD/CLR the ready "bit" bound with the handle and mask.

## Public Attributes

| ACE_ALLOC_HOOK_DECLARE
| Declare the dynamic allocation hooks.

## Protected Member Functions

int | work_pending_i (ACE_Time_Value *max_wait_time)
| Non-locking version of wait_pending().
int | handle_events_i (ACE_Time_Value *max_wait_time, Token_Guard &guard)
int | upcall (ACE_Event_Handler *event_handler, int(ACE_Event_Handler::*callback)(ACE_HANDLE), ACE_HANDLE handle)
| Perform the upcall with the given event handler method.
int | dispatch (Token_Guard &guard)
int | dispatch_timer_handler (Token_Guard &guard)
int | dispatch_io_event (Token_Guard &guard)
int | register_handler_i (ACE_HANDLE handle, ACE_Event_Handler *eh, ACE_Reactor_Mask mask)
| Register the given event handler with the reactor.
int | remove_handler_i (ACE_HANDLE handle, ACE_Reactor_Mask mask)
int | suspend_handler_i (ACE_HANDLE handle)
| Temporarily remove the given handle from the "interest set.".
int | resume_handler_i (ACE_HANDLE handle)
int | mask_ops_i (ACE_HANDLE handle, ACE_Reactor_Mask mask, int ops)
short | reactor_mask_to_poll_event (ACE_Reactor_Mask mask)
| Convert a reactor mask to its corresponding poll() event mask.

## Protected Attributes

bool | initialized_
| Has the reactor been initialized.
ACE_HANDLE | poll_fd_
size_t | size_
epoll_event * | events_
| Table of event structures to be filled by epoll_wait:.
epoll_event * | start_pevents_
epoll_event * | end_pevents_
| The last element in the event array plus one.
sig_atomic_t | deactivated_
ACE_Dev_Poll_Reactor_Token | token_
| Lock used for synchronization of reactor state.
ACE_Lock_Adapter< ACE_Dev_Poll_Reactor_Token > | lock_adapter_
| Adapter used to return internal lock to outside world.
ACE_Dev_Poll_Reactor_Handler_Repository | handler_rep_
| The repository that contains all registered event handlers.
ACE_Timer_Queue * | timer_queue_
| Defined as a pointer to allow overriding by derived classes...
int | delete_timer_queue_
ACE_Sig_Handler * | signal_handler_
| Handle signals without requiring global/static variables.
int | delete_signal_handler_
ACE_Reactor_Notify * | notify_handler_
int | delete_notify_handler_
int | mask_signals_
int | restart_

## Detailed Description

A `/dev/poll' or `/dev/epoll' based Reactor implemenatation.

Attention:
  This reactor is experimental.

The ACE_Dev_Poll_Reactor uses the `/dev/poll' or '/dev/epoll' character devices to demultiplex events on a given set of file descriptors. Unlike `select()`, `/dev/poll' and `/dev/epoll' have no hard-coded limit on the number of file descriptors that may be handled at any given time. As such, the ACE_Dev_Poll_Reactor can generally handle a much larger number of file descriptors than `select()` -based reactors. Furthermore, since `/dev/poll' and `/dev/epoll' both return a set of file descriptors that are active, there is no need to "walk" the set of file descriptors to determine which ones are active, such as what is done with the `select()` and `poll()` system calls. All returned file descriptors are active. This makes event dispatching very efficient.

Note:
  In general, this reactor may only be used to demultiplex events on sockets. Demultiplexing events on pipes, for example may not work. This is due to a limitation in the underlying `/dev/poll' device driver.

  It is only possible to achieve millisecond timeout resolutions with the `ACE_Dev_Poll_Reactor`. However, the timeout resolution for timers is independent of the reactors timeout resolution. As such, it may be possible to achieve sub-millisecond timeout resolutions for timers but that is entirely platform dependent.

## Constructor & Destructor Documentation

ACE_Dev_Poll_Reactor::ACE_Dev_Poll_Reactor | ( | ACE_Sig_Handler * | = `0`,
|  | ACE_Timer_Queue * | = `0`,
|  | int | disable_notify_pipe = `0`,
|  | ACE_Reactor_Notify * | notify = `0`,
|  | int | mask_signals = `1`,
|  | int | s_queue = `ACE_DEV_POLL_TOKEN::FIFO`
| ) |

| Initialize `ACE_Dev_Poll_Reactor` with the default size. The default size for the `ACE_Dev_Poll_Reactor` is the maximum number of open file descriptors for the process.

ACE_Dev_Poll_Reactor::ACE_Dev_Poll_Reactor | ( | size_t | size,
|  | int | restart = `0`,
|  | ACE_Sig_Handler * | = `0`,
|  | ACE_Timer_Queue * | = `0`,
|  | int | disable_notify_pipe = `0`,
|  | ACE_Reactor_Notify * | notify = `0`,
|  | int | mask_signals = `1`,
|  | int | s_queue = `ACE_DEV_POLL_TOKEN::FIFO`
| ) |

Initialize ACE_Dev_Poll_Reactor with size size.

Note:
  On Unix platforms, the size parameter should be as large as the maximum number of file descriptors allowed for a given process. This is necessary since a file descriptor is used to directly index the array of event handlers maintained by the Reactor's handler repository. Direct indexing is used for efficiency reasons. If the size parameter is less than the process maximum, the process maximum will be decreased in order to prevent potential access violations.

ACE_Dev_Poll_Reactor::~ACE_Dev_Poll_Reactor | ( | void |  | ) | `[virtual]`

| Close down and release all resources.

## Member Function Documentation

int ACE_Dev_Poll_Reactor::alertable_handle_events | ( | ACE_Time_Value & | max_wait_time | ) | `[virtual]`

| Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::alertable_handle_events | ( | ACE_Time_Value * | max_wait_time = `0` | ) | `[virtual]`

| Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::cancel_timer | ( | long | timer_id,
|  | const void ** | arg = `0`,
|  | int | dont_call_handle_close = `1`
| ) | `[virtual]`

Cancel the single event handler that matches the timer_id value (which was returned from the schedule method). If arg is non-NULL then it will be set to point to the ``magic cookie'' argument passed in when the event handler was registered. This makes it possible to free up the memory and avoid memory leaks. Returns 1 if cancellation succeeded and 0 if the timer_id wasn't found.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::cancel_timer | ( | ACE_Event_Handler * | event_handler,
|  | int | dont_call_handle_close = `1`
| ) | `[virtual]`

| Cancel all Event_Handlers that match the address of <event_handler>. Returns number of handlers cancelled. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::cancel_wakeup | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | masks_to_be_cleared
| ) | `[virtual]`

| Clear <masks_to_be_cleared> from the <handle>'s entry. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::cancel_wakeup | ( | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | masks_to_be_cleared
| ) | `[virtual]`

| Clear <masks_to_be_cleared> from the <event_handler>'s entry. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::close | ( | void |  | ) | `[virtual]`

| Close down and release all resources. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::current_info | ( | ACE_HANDLE | handle,
|  | size_t & |
| ) | `[virtual]`

Parameters:

  | handle | allows the reactor to check if the caller is valid.

Returns:
  0 if the size of the current message has been put in size. -1 if not.

Implements ACE_Reactor_Impl.

void ACE_Dev_Poll_Reactor::deactivate | ( | int | do_stop | ) | `[virtual]`

| Control whether the Reactor will handle any more incoming events or not. If do_stop == 1, the Reactor will be disabled. By default, a reactor is in active state and can be deactivated/reactived as desired. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::deactivated | ( | void |  | ) | `[virtual]`

Returns:
  The status of Reactor. If this function returns 0, the reactor is actively handling events. If it returns non-zero, `handle_events()` and `handle_alertable_events()` return -1 immediately.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::dispatch | ( | Token_Guard & | guard | ) | `[protected]`

| Dispatch ACE_Event_Handlers for time events, I/O events, and signal events. Returns the total number of ACE_Event_Handlers that were dispatched or -1 if something goes wrong.

int ACE_Dev_Poll_Reactor::dispatch_io_event | ( | Token_Guard & | guard | ) | `[protected]`

| Dispatch an IO event to the corresponding event handler. Returns Returns: 0 if no events ready (token still held), 1 if an event was expired (token released), -1 on error (token still held).

int ACE_Dev_Poll_Reactor::dispatch_timer_handler | ( | Token_Guard & | guard | ) | `[protected]`

| Dispatch a single timer, if ready. Returns: 0 if no timers ready (token still held), 1 if a timer was expired (token released), -1 on error (token still held).

void ACE_Dev_Poll_Reactor::dump | ( | void |  | ) | const`[virtual]`

| Dump the state of an object. Implements ACE_Reactor_Impl.

ACE_Event_Handler * ACE_Dev_Poll_Reactor::find_handler | ( | ACE_HANDLE | handle | ) | `[virtual]`

| Return the Event_Handler associated with <handle>. Return 0 if <handle> is not registered. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::handle_events | ( | ACE_Time_Value & | max_wait_time | ) | `[virtual]`

This method is just like the one above, except the max_wait_time value is a reference and can therefore never be `NULL`.

Note:
  It is only possible to achieve millisecond timeout resolutions with the `ACE_Dev_Poll_Reactor`.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::handle_events | ( | ACE_Time_Value * | max_wait_time = `0` | ) | `[virtual]`

This event loop driver blocks for up to max_wait_time before returning. It will return earlier if events occur. Note that max_wait_time can be 0, in which case this method blocks indefinitely until events occur.

  max_wait_time is decremented to reflect how much time this call took. For instance, if a time value of 3 seconds is passed to `handle_events()` and an event occurs after 2 seconds, max_wait_time will equal 1 second. This can be used if an application wishes to handle events for some fixed amount of time.

  The only difference between `alertable_handle_events()` and handle_events() is that in the alertable case, the event loop will return when the system queues an I/O completion routine or an Asynchronous Procedure Call.

Returns:
  The total number of `ACE_Event_Handlers` that were dispatched, 0 if the max_wait_time elapsed without dispatching any handlers, or -1 if an error occurs.

Note:
  It is only possible to achieve millisecond timeout resolutions with the `ACE_Dev_Poll_Reactor`.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::handle_events_i | ( | ACE_Time_Value * | max_wait_time,
|  | Token_Guard & | guard
| ) | `[protected]`

| This is a helper method called by all handle_events() methods.

int ACE_Dev_Poll_Reactor::handler | ( | int | signum,
|  | ACE_Event_Handler ** | = `0`
| ) | `[virtual]`

| Check to see if <signum> is associated with a valid Event_Handler bound to a signal. Return the <event_handler> associated with this <handler> if <event_handler> != 0. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::handler | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | mask,
|  | ACE_Event_Handler ** | event_handler = `0`
| ) | `[virtual]`

| Check to see if <handle> is associated with a valid Event_Handler bound to <mask>. Return the <event_handler> associated with this <handler> if <event_handler> != 0. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::initialized | ( | void |  | ) | `[virtual]`

| Returns true if Reactor has been successfully initialized, else false. Implements ACE_Reactor_Impl.

ACE_Lock & ACE_Dev_Poll_Reactor::lock | ( | void |  | ) | `[virtual]`

| Returns a reference to the Reactor's internal lock. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::mask_ops | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | mask,
|  | int | ops
| ) | `[virtual]`

Returns:
  Old mask on success, -1 on error.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::mask_ops | ( | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | mask,
|  | int | ops
| ) | `[virtual]`

Returns:
  Old mask on success, -1 on error.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::mask_ops_i | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | mask,
|  | int | ops
| ) | `[protected]`

Returns:
  Old mask on success, -1 on error.

int ACE_Dev_Poll_Reactor::max_notify_iterations | ( | void |  | ) | `[virtual]`

| Get the maximum number of times that the ACE_Reactor_Impl will iterate and dispatch the <ace_event_handlers> that are passed in via the notify queue before breaking out of its <ACE_Message_Queue::dequeue> loop. Implements ACE_Reactor_Impl.

void ACE_Dev_Poll_Reactor::max_notify_iterations | ( | int |  | ) | `[virtual]`

Set the maximum number of times that ACE_Reactor_Impl will iterate and dispatch the <ace_event_handlers> that are passed in via the notify queue before breaking out of its <ACE_Message_Queue::dequeue> 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_Impl.

int ACE_Dev_Poll_Reactor::notify | ( | ACE_Event_Handler * | event_handler = `0`,
|  | ACE_Reactor_Mask | mask = `ACE_Event_Handler::EXCEPT_MASK`,
|  | ACE_Time_Value * | = `0`
| ) | `[virtual]`

| Notify <event_handler> of <mask> event. The <ace_time_value> indicates how long to blocking trying to notify. 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_Impl.

int ACE_Dev_Poll_Reactor::open | ( | size_t | size,
|  | int | restart = `0`,
|  | ACE_Sig_Handler * | = `0`,
|  | ACE_Timer_Queue * | = `0`,
|  | int | disable_notify_pipe = `0`,
|  | ACE_Reactor_Notify * | = `0`
| ) | `[virtual]`

| Initialization. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::owner | ( | ACE_thread_t * | owner | ) | `[virtual]`

Return the ID of the "owner" thread.

Note:
  There is no need to set the owner of the event loop for the ACE_Dev_Poll_Reactor. Multiple threads may invoke the event loop simulataneously. As such, this method is a no-op.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::owner | ( | ACE_thread_t | new_owner,
|  | ACE_thread_t * | old_owner = `0`
| ) | `[virtual]`

Transfers ownership of Reactor_Impl to the new_owner.

Note:
  There is no need to set the owner of the event loop for the ACE_Dev_Poll_Reactor. Multiple threads may invoke the event loop simulataneously. As such, this method is a no-op.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::purge_pending_notifications | ( | ACE_Event_Handler * | = `0`,
|  | ACE_Reactor_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_Impl.

short ACE_Dev_Poll_Reactor::reactor_mask_to_poll_event | ( | ACE_Reactor_Mask | mask | ) | `[protected]`

| Convert a reactor mask to its corresponding poll() event mask.

int ACE_Dev_Poll_Reactor::ready_ops | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | ,
|  | int | ops
| ) | `[virtual]`

| GET/SET/ADD/CLR the ready "bit" bound with the handle and mask. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::ready_ops | ( | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | mask,
|  | int | ops
| ) | `[virtual]`

| GET/SET/ADD/CLR the ready "bit" bound with the event_handler and mask. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::register_handler | ( | const ACE_Sig_Set & | sigset,
|  | ACE_Event_Handler * | new_sh,
|  | ACE_Sig_Action * | new_disp = `0`
| ) | `[virtual]`

| Registers <new_sh> to handle a set of signals <sigset> using the <new_disp>. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::register_handler | ( | int | signum,
|  | ACE_Event_Handler * | new_sh,
|  | ACE_Sig_Action * | new_disp = `0`,
|  | ACE_Event_Handler ** | old_sh = `0`,
|  | ACE_Sig_Action * | old_disp = `0`
| ) | `[virtual]`

| Register new_sh to handle the signal signum using the new_disp. Returns the old_sh that was previously registered (if any), along with the old_disp of the signal handler. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::register_handler | ( | const ACE_Handle_Set & | handles,
|  | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | mask
| ) | `[virtual]`

| Register event_handler> with all the handles> in the `Handle_Set`. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::register_handler | ( | ACE_HANDLE | event_handle,
|  | ACE_HANDLE | io_handle,
|  | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | mask
| ) | `[virtual]`

| Register an event_handler that will be notified when event_handle is signaled. mask specifies the network events that the event_handler is interested in. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::register_handler | ( | ACE_HANDLE | io_handle,
|  | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | mask
| ) | `[virtual]`

| Register event_handler with mask. The I/O handle is provided through the io_handle parameter. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::register_handler | ( | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | mask
| ) | `[virtual]`

| Register event_handler with mask. The I/O handle will always come from get_handle on the event_handler. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::register_handler_i | ( | ACE_HANDLE | handle,
|  | ACE_Event_Handler * | eh,
|  | ACE_Reactor_Mask | mask
| ) | `[protected]`

| Register the given event handler with the reactor.

int ACE_Dev_Poll_Reactor::remove_handler | ( | const ACE_Sig_Set & | sigset | ) | `[virtual]`

| Calls <remove_handler> for every signal in <sigset>. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::remove_handler | ( | int | signum,
|  | ACE_Sig_Action * | new_disp,
|  | ACE_Sig_Action * | old_disp = `0`,
|  | int | sigkey = `-1`
| ) | `[virtual]`

| Remove the ACE_Event_Handler currently associated with <signum>. Install the new disposition (if given) and return the previous disposition (if desired by the caller). Returns 0 on success and -1 if <signum> is invalid. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::remove_handler | ( | const ACE_Handle_Set & | handle_set,
|  | ACE_Reactor_Mask | mask
| ) | `[virtual]`

| Removes all handles in <handle_set>. If <mask> == <ACE_Event_Handler::DONT_CALL> then the <handle_close> method of the associated <event_handler>s is not invoked. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::remove_handler | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | mask
| ) | `[virtual]`

| Removes <handle>. If <mask> == <ACE_Event_Handler::DONT_CALL> then the <handle_close> method of the associated <event_handler> is not invoked. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::remove_handler | ( | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | mask
| ) | `[virtual]`

Removes event_handler.

Note:
  The I/O handle will be obtained using `get_handle()` method of event_handler . If mask == `ACE_Event_Handler::DONT_CALL` then the `handle_close()` method of the event_handler is not invoked.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::remove_handler_i | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | mask
| ) | `[protected]`

| Remove the event handler associated with the given handle and event mask from the "interest set."

int ACE_Dev_Poll_Reactor::requeue_position | ( | void |  | ) | `[virtual]`

Get position of the owner thread.

Note:
  This is currently a no-op.

Implements ACE_Reactor_Impl.

void ACE_Dev_Poll_Reactor::requeue_position | ( | int |  | ) | `[virtual]`

Set position of the owner thread.

Note:
  This is currently a no-op.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::reset_timer_interval | ( | long | timer_id,
|  | const ACE_Time_Value & | interval
| ) | `[virtual]`

| Resets the interval of the timer represented by <timer_id> to <interval>, which is specified in relative time to the current <gettimeofday>. If <interval> is equal to <ACE_Time_Value::zero>, the timer will become a non-rescheduling timer. Returns 0 if successful, -1 if not. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::restart | ( | int | r | ) | `[virtual]`

Set a new value for restart and return the original value.

Parameters:

  | r | If zero, then the event loop will not be automatically restarted if the underlying poll is interrupted via the INTR (interrupt) signal.

Returns:
  Returns the previous "restart" value.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::restart | ( | void |  | ) | `[virtual]`

| Get the existing restart value. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::resumable_handler | ( | void |  | ) | `[virtual]`

| Does the reactor allow the application to resume the handle on its own, i.e., can it pass on the control of handle resumption to the application. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::resume_handler | ( | const ACE_Handle_Set & | handles | ) | `[virtual]`

| Resume all handles in handle set. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::resume_handler | ( | ACE_HANDLE | handle | ) | `[virtual]`

| Resume handle. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::resume_handler | ( | ACE_Event_Handler * | event_handler | ) | `[virtual]`

| Resume event_handler. Use ACE_Event_Handler::get_handle() to get the handle. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::resume_handler_i | ( | ACE_HANDLE | handle | ) | `[protected]`

| Place the given handle that was temporarily removed from the "interest set," i.e that was suspended, back in to the interest set. The given handle will once again be polled for events.

int ACE_Dev_Poll_Reactor::resume_handlers | ( | void |  | ) | `[virtual]`

| Resume all handles. Implements ACE_Reactor_Impl.

long ACE_Dev_Poll_Reactor::schedule_timer | ( | ACE_Event_Handler * | event_handler,
|  | const void * | arg,
|  | const ACE_Time_Value & | delay,
|  | const ACE_Time_Value & | interval = `ACE_Time_Value::zero`
| ) | `[virtual]`

Schedule an ACE_Event_Handler that will expire after an amount of time. The return value of this method, a timer_id value, uniquely identifies the event_handler in the ACE_Reactor's internal list of timers. This timer_id value can be used to cancel the timer with the cancel_timer() call.

See also:
  cancel_timer()

  reset_timer_interval()

Parameters:

  | event_handler | event handler to schedule on reactor
  | arg | argument passed to the handle_timeout() method of event_handler.
  | delay | time interval after which the timer will expire.
  | interval | time interval for which the timer will be automatically rescheduled.

Returns:
  -1 on failure, a timer_id value on success

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::schedule_wakeup | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | masks_to_be_added
| ) | `[virtual]`

| Add <masks_to_be_added> to the <handle>'s entry. <event_handler> associated with <handle> must already have been registered. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::schedule_wakeup | ( | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | masks_to_be_added
| ) | `[virtual]`

| Add <masks_to_be_added> to the <event_handler>'s entry. <event_handler> must already have been registered. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::set_sig_handler | ( | ACE_Sig_Handler * | signal_handler | ) | `[virtual]`

| Use a user specified signal handler instead. Implements ACE_Reactor_Impl.

size_t ACE_Dev_Poll_Reactor::size | ( | void |  | ) | const`[virtual]`

| Returns the current size of the Reactor's internal descriptor table. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::suspend_handler | ( | const ACE_Handle_Set & | handles | ) | `[virtual]`

| Suspend all handles in handle set temporarily. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::suspend_handler | ( | ACE_HANDLE | handle | ) | `[virtual]`

| Suspend handle temporarily. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::suspend_handler | ( | ACE_Event_Handler * | event_handler | ) | `[virtual]`

| Suspend event_handler temporarily. Use ACE_Event_Handler::get_handle() to get the handle. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::suspend_handler_i | ( | ACE_HANDLE | handle | ) | `[protected]`

| Temporarily remove the given handle from the "interest set.".

int ACE_Dev_Poll_Reactor::suspend_handlers | ( | void |  | ) | `[virtual]`

| Suspend all handles temporarily. Implements ACE_Reactor_Impl.

ACE_Timer_Queue * ACE_Dev_Poll_Reactor::timer_queue | ( | void |  | ) | const`[virtual]`

Get the timer queue

Returns:
  The current `ACE_Timer_Queue`.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::timer_queue | ( | ACE_Timer_Queue * | tq | ) | `[virtual]`

| Set a user-specified timer queue. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_Dev_Poll_Reactor::upcall | ( | ACE_Event_Handler * | event_handler,
|  | int(ACE_Event_Handler::*)(ACE_HANDLE) | callback,
|  | ACE_HANDLE | handle
| ) | `[protected]`

| Perform the upcall with the given event handler method.

int ACE_Dev_Poll_Reactor::uses_event_associations | ( | void |  | ) | `[virtual]`

| Return 1 if we any event associations were made by the reactor for the handles that it waits on, 0 otherwise. Implements ACE_Reactor_Impl.

void ACE_Dev_Poll_Reactor::wakeup_all_threads | ( | void |  | ) | `[virtual]`

| Wake up all threads waiting in the event loop. Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::work_pending | ( | const ACE_Time_Value & | max_wait_time = `ACE_Time_Value::zero` | ) | `[virtual]`

Returns non-zero if there are I/O events "ready" for dispatching, but does not actually dispatch the event handlers. By default, don't block while checking this, i.e., "poll".

Note:
  It is only possible to achieve millisecond timeout resolutions with the `ACE_Dev_Poll_Reactor`.

Implements ACE_Reactor_Impl.

int ACE_Dev_Poll_Reactor::work_pending_i | ( | ACE_Time_Value * | max_wait_time | ) | `[protected]`

Non-locking version of wait_pending().

Returns non-zero if there are I/O events "ready" for dispatching, but does not actually dispatch the event handlers. By default, don't block while checking this, i.e., "poll".

Note:
  It is only possible to achieve millisecond timeout resolutions with the ACE_Dev_Poll_Reactor.

## Member Data Documentation

ACE_Dev_Poll_Reactor::ACE_ALLOC_HOOK_DECLARE

| Declare the dynamic allocation hooks. Reimplemented from ACE_Reactor_Impl.

sig_atomic_t ACE_Dev_Poll_Reactor::deactivated_`[protected]`

| This flag is used to keep track of whether we are actively handling events or not.

int ACE_Dev_Poll_Reactor::delete_notify_handler_`[protected]`

| Keeps track of whether we need to delete the notify handler (if we didn't create it, then we don't delete it).

int ACE_Dev_Poll_Reactor::delete_signal_handler_`[protected]`

| Keeps track of whether we should delete the signal handler (if we didn't create it, then we don't delete it).

int ACE_Dev_Poll_Reactor::delete_timer_queue_`[protected]`

| Keeps track of whether we should delete the timer queue (if we didn't create it, then we don't delete it).

struct epoll_event* ACE_Dev_Poll_Reactor::end_pevents_`[protected]`

| The last element in the event array plus one. The loop that dispatches IO events stops when this->start_pevents_ == this->end_pevents_.

struct epoll_event* ACE_Dev_Poll_Reactor::events_`[protected]`

| Table of event structures to be filled by epoll_wait:. Track HANDLES we are interested in for various events that must be dispatched *without* polling. ACE_Dev_Poll_Ready_Set ready_set_;

ACE_Dev_Poll_Reactor_Handler_Repository ACE_Dev_Poll_Reactor::handler_rep_`[protected]`

| The repository that contains all registered event handlers.

bool ACE_Dev_Poll_Reactor::initialized_`[protected]`

| Has the reactor been initialized.

ACE_Lock_Adapter<ACE_Dev_Poll_Reactor_Token> ACE_Dev_Poll_Reactor::lock_adapter_`[protected]`

| Adapter used to return internal lock to outside world.

int ACE_Dev_Poll_Reactor::mask_signals_`[protected]`

| If 0 then the Reactor will not mask the signals during the event dispatching. This is useful for applications that do not register any signal handlers and want to reduce the overhead introduce by the kernel level locks required to change the mask.

ACE_Reactor_Notify* ACE_Dev_Poll_Reactor::notify_handler_`[protected]`

| Callback object that unblocks the <ace_select_reactor> if it's sleeping.

ACE_HANDLE ACE_Dev_Poll_Reactor::poll_fd_`[protected]`

| All interactions with the `/dev/poll' or `/dev/epoll' device are done through this file descriptor.

int ACE_Dev_Poll_Reactor::restart_`[protected]`

| Restart the handle_events event loop method automatically when polling function in use (ioctl() in this case) is interrupted via an EINTR signal.

ACE_Sig_Handler* ACE_Dev_Poll_Reactor::signal_handler_`[protected]`

| Handle signals without requiring global/static variables.

size_t ACE_Dev_Poll_Reactor::size_`[protected]`

| The maximum number of file descriptors over which demultiplexing will occur.

struct epoll_event* ACE_Dev_Poll_Reactor::start_pevents_`[protected]`

| Pointer to the next epoll_event array element that contains the next event to be dispatched.

ACE_Timer_Queue* ACE_Dev_Poll_Reactor::timer_queue_`[protected]`

| Defined as a pointer to allow overriding by derived classes...

ACE_Dev_Poll_Reactor_Token ACE_Dev_Poll_Reactor::token_`[protected]`

| Lock used for synchronization of reactor state.

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

- Dev_Poll_Reactor.h
- Dev_Poll_Reactor.cpp
- Dev_Poll_Reactor.inl