# ACE_WFMO_Reactor Class Reference

An object oriented event demultiplexor and event handler. ACE_WFMO_Reactor is a Windows-only implementation of the ACE_Reactor interface that uses the WaitForMultipleObjects() event demultiplexer. More...

`#include <WFMO_Reactor.h>`

Inheritance diagram for ACE_WFMO_Reactor:

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Collaboration diagram for ACE_WFMO_Reactor:

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List of all members.

## Public Types

enum | { DEFAULT_SIZE = MAXIMUM_WAIT_OBJECTS - 2 }

## Public Member Functions

| ACE_WFMO_Reactor (ACE_Sig_Handler *=0, ACE_Timer_Queue *=0, ACE_Reactor_Notify *=0)
| Initialize ACE_WFMO_Reactor with the default size.
| ACE_WFMO_Reactor (size_t size, int unused=0, ACE_Sig_Handler *=0, ACE_Timer_Queue *=0, ACE_Reactor_Notify *=0)
virtual int | open (size_t size=ACE_WFMO_Reactor::DEFAULT_SIZE, int restart=0, ACE_Sig_Handler *=0, ACE_Timer_Queue *=0, int disable_notify_pipe=0, ACE_Reactor_Notify *=0)
virtual int | current_info (ACE_HANDLE, size_t &)
| Returns -1 (not used in this implementation);.
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
| Return the current ACE_Timer_Queue.
virtual int | close (void)
| Close down the ACE_WFMO_Reactor and release all of its resources.
virtual | ~ACE_WFMO_Reactor (void)
| Close down the ACE_WFMO_Reactor and release all of its 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_HANDLE event_handle=ACE_INVALID_HANDLE)
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 (ACE_HANDLE io_handle, ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask)
virtual int | register_handler (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)
virtual int | remove_handler (ACE_HANDLE handle, ACE_Reactor_Mask mask)
virtual int | remove_handler (const ACE_Handle_Set &handle_set, ACE_Reactor_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_deleted)
virtual int | cancel_wakeup (ACE_HANDLE handle, ACE_Reactor_Mask masks_to_be_deleted)
virtual int | notify (ACE_Event_Handler *=0, ACE_Reactor_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)
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 WFMO_Reactor's internal lock.
virtual void | wakeup_all_threads (void)
virtual int | owner (ACE_thread_t new_owner, ACE_thread_t *old_owner=0)
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)
| Not implemented.
virtual int | requeue_position (void)
| Not implemented.
virtual int | mask_ops (ACE_Event_Handler *event_handler, ACE_Reactor_Mask masks, int operation)
virtual int | mask_ops (ACE_HANDLE handle, ACE_Reactor_Mask masks, int ops)
virtual int | ready_ops (ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask, int ops)
| Not implemented.
virtual int | ready_ops (ACE_HANDLE handle, ACE_Reactor_Mask, int ops)
| Not implemented.
virtual void | dump (void) const
| Dump the state of an object.

## Public Attributes

| ACE_ALLOC_HOOK_DECLARE
| Declare the dynamic allocation hooks.

## Protected Member Functions

virtual int | register_handler_i (ACE_HANDLE event_handle, ACE_HANDLE io_handle, ACE_Event_Handler *event_handler, ACE_Reactor_Mask mask)
| Registration workhorse.
virtual int | event_handling (ACE_Time_Value *max_wait_time=0, int alertable=0)
| Event handling workhorse.
virtual int | mask_ops_i (ACE_HANDLE io_handle, ACE_Reactor_Mask masks, int operation)
| Bit masking workhorse.
virtual ACE_thread_t | owner_i (void)
| Return the ID of the "owner" thread. Does not do any locking.
virtual int | ok_to_wait (ACE_Time_Value *max_wait_time, int alertable)
| Check to see if it is ok to enter <::WaitForMultipleObjects>.
virtual DWORD | wait_for_multiple_events (int timeout, int alertable)
| Wait for timer and I/O events to occur.
virtual DWORD | poll_remaining_handles (DWORD slot)
| Check for activity on remaining handles.
virtual int | expire_timers (void)
virtual int | dispatch (DWORD wait_status)
| Dispatches the timers and I/O handlers.
virtual int | safe_dispatch (DWORD wait_status)
virtual int | dispatch_handles (DWORD slot)
virtual int | dispatch_handler (DWORD slot, DWORD max_handlep1)
virtual int | simple_dispatch_handler (DWORD slot, ACE_HANDLE event_handle)
virtual int | complex_dispatch_handler (DWORD slot, ACE_HANDLE event_handle)
virtual int | dispatch_window_messages (void)
| Dispatches window messages. Noop for WFMO_Reactor.
virtual ACE_Reactor_Mask | upcall (ACE_Event_Handler *event_handler, ACE_HANDLE io_handle, WSANETWORKEVENTS &events)
virtual int | calculate_timeout (ACE_Time_Value *time)
| Used to caluculate the next timeout.
virtual int | update_state (void)
| Update the state of the handler repository.
virtual int | new_owner (void)
| Check to see if we have a new owner.
virtual int | change_owner (void)
| Set owner to new owner.

## Protected Attributes

ACE_Sig_Handler * | signal_handler_
| Handle signals without requiring global/static variables.
int | delete_signal_handler_
ACE_Timer_Queue * | timer_queue_
| Defined as a pointer to allow overriding by derived classes...
int | delete_timer_queue_
int | delete_handler_rep_
| Keeps track of whether we should delete the handler repository.
ACE_Reactor_Notify * | notify_handler_
| Used when <notify> is called.
int | delete_notify_handler_
| Keeps track of whether we should delete the notify handler.
ACE_Process_Mutex | lock_
ACE_Lock_Adapter< ACE_Process_Mutex > | lock_adapter_
| Adapter used to return internal lock to outside world.
ACE_WFMO_Reactor_Handler_Repository | handler_rep_
| Table that maps <ace_handles> to <ACE_Event_Handler *>'s.
ACE_Manual_Event | ok_to_wait_
ACE_Manual_Event | wakeup_all_threads_
ACE_Wakeup_All_Threads_Handler | wakeup_all_threads_handler_
| Used when <wakeup_all_threads_> is signaled.
ACE_Auto_Event | waiting_to_change_state_
size_t | active_threads_
| Count of currently active threads.
ACE_thread_t | owner_
ACE_thread_t | new_owner_
| The owner to be of the WFMO_Reactor.
ACE_thread_t | change_state_thread_
ACE_HANDLE | atomic_wait_array_ [2]
int | open_for_business_
| This flag is used to keep track of whether we are already closed.
sig_atomic_t | deactivated_

## Private Member Functions

| ACE_WFMO_Reactor (const ACE_WFMO_Reactor &)
| Deny access since member-wise won't work...
ACE_WFMO_Reactor & | operator= (const ACE_WFMO_Reactor &)

## Friends

class | ACE_WFMO_Reactor_Handler_Repository
class | ACE_WFMO_Reactor_Test

## Detailed Description

An object oriented event demultiplexor and event handler. ACE_WFMO_Reactor is a Windows-only implementation of the ACE_Reactor interface that uses the WaitForMultipleObjects() event demultiplexer.

Like the other ACE Reactors, ACE_WFMO_Reactor can schedule timers. It also reacts to signalable handles, such as events (see the documentation for WaitForMultipleObjects() for a complete list of signalable handle types). Therefore, I/O handles are not directly usable for registering for input, output, and exception notification. The exception to this is ACE_SOCK-based handles, which can be registered for input, output, and exception notification just as with other platforms. See Chapter 4 in C++NPv2 for complete details.

Note that changes to the state of ACE_WFMO_Reactor are not instantaneous. Most changes (registration, removal, suspension, and resumption of handles, and changes in ownership) are made when the ACE_WFMO_Reactor reaches a stable state. Users should be careful, especially when removing handlers. This is because the ACE_WFMO_Reactor will call handle_close() on the handler when it is finally removed and not when remove_handler() is called. If the registered handler's pointer is not valid when ACE_WFMO_Reactor calls ACE_Event_Handler::handle_close(), use the DONT_CALL flag with remove_handler(). Preferably, use dynamically allocated event handlers and call "delete this" inside the handle_close() hook method.

## Member Enumeration Documentation

anonymous enum

Enumeration values:

  DEFAULT_SIZE | Default size of the WFMO_Reactor's handle table. Two slots will be added to the size parameter in the constructor and open methods which will store handles used for internal management purposes.

## Constructor & Destructor Documentation

ACE_WFMO_Reactor::ACE_WFMO_Reactor | ( | ACE_Sig_Handler * | = `0`,
|  | ACE_Timer_Queue * | = `0`,
|  | ACE_Reactor_Notify * | = `0`
| ) |

| Initialize ACE_WFMO_Reactor with the default size.

ACE_WFMO_Reactor::ACE_WFMO_Reactor | ( | size_t | size,
|  | int | unused = `0`,
|  | ACE_Sig_Handler * | = `0`,
|  | ACE_Timer_Queue * | = `0`,
|  | ACE_Reactor_Notify * | = `0`
| ) |

Initialize ACE_WFMO_Reactor with the specified size.

Parameters:

  | size | The maximum number of handles the reactor can register. The value should not exceed ACE_WFMO_Reactor::DEFAULT_SIZE. Two slots will be added to the size parameter which will store handles used for internal management purposes.

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

| Close down the ACE_WFMO_Reactor and release all of its resources.

ACE_WFMO_Reactor::ACE_WFMO_Reactor | ( | const ACE_WFMO_Reactor & |  | ) | `[private]`

| Deny access since member-wise won't work...

## Member Function Documentation

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

| Implements ACE_Reactor_Impl. Reimplemented in ACE_Msg_WFMO_Reactor.

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

| Implements ACE_Reactor_Impl. Reimplemented in ACE_Msg_WFMO_Reactor.

int ACE_WFMO_Reactor::calculate_timeout | ( | ACE_Time_Value * | time | ) | `[protected, virtual]`

| Used to caluculate the next timeout.

ACE_INLINE int ACE_WFMO_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.

ACE_INLINE int ACE_WFMO_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 handler's cancelled. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_Reactor::cancel_wakeup | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | masks_to_be_deleted
| ) | `[virtual]`

| Remove <masks_to_be_deleted> to the <handle>'s entry in WFMO_Reactor. The Event_Handler associated with <handle> must already have been registered with WFMO_Reactor. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_Reactor::cancel_wakeup | ( | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | masks_to_be_deleted
| ) | `[virtual]`

| Remove <masks_to_be_deleted> to the <handle>'s entry in WFMO_Reactor. The Event_Handler associated with <handle> must already have been registered with WFMO_Reactor. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_Reactor::change_owner | ( | void |  | ) | `[protected, virtual]`

| Set owner to new owner.

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

| Close down the ACE_WFMO_Reactor and release all of its resources. Implements ACE_Reactor_Impl.

int ACE_WFMO_Reactor::complex_dispatch_handler | ( | DWORD | slot,
|  | ACE_HANDLE | event_handle
| ) | `[protected, virtual]`

| Dispatches a single handler. Returns 0 on success, -1 if the handler was removed.

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

| Returns -1 (not used in this implementation);. Implements ACE_Reactor_Impl.

ACE_INLINE void ACE_WFMO_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 wish. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_Reactor::deactivated | ( | void |  | ) | `[virtual]`

| Return the status of Reactor. If this function returns 0, the reactor is actively handling events. If it returns non-zero, <handling_events> and <handle_alertable_events> return -1 immediately. Implements ACE_Reactor_Impl.

int ACE_WFMO_Reactor::dispatch | ( | DWORD | wait_status | ) | `[protected, virtual]`

| Dispatches the timers and I/O handlers.

int ACE_WFMO_Reactor::dispatch_handler | ( | DWORD | slot,
|  | DWORD | max_handlep1
| ) | `[protected, virtual]`

| Dispatches a single handler. Returns 0 on success, -1 if the handler was removed.

int ACE_WFMO_Reactor::dispatch_handles | ( | DWORD | slot | ) | `[protected, virtual]`

| Dispatches any active handles from handles_[<slot>] to handles_[active_handles_] using <waitformultipleobjects> to poll through our handle set looking for active handles.

ACE_INLINE int ACE_WFMO_Reactor::dispatch_window_messages | ( | void |  | ) | `[protected, virtual]`

| Dispatches window messages. Noop for WFMO_Reactor. Reimplemented in ACE_Msg_WFMO_Reactor.

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

| Dump the state of an object. Implements ACE_Reactor_Impl.

int ACE_WFMO_Reactor::event_handling | ( | ACE_Time_Value * | max_wait_time = `0`,
|  | int | alertable = `0`
| ) | `[protected, virtual]`

| Event handling workhorse.

int ACE_WFMO_Reactor::expire_timers | ( | void |  | ) | `[protected, virtual]`

| Expire timers. Only the owner thread does useful stuff in this function.

ACE_INLINE ACE_Event_Handler * ACE_WFMO_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.

ACE_INLINE int ACE_WFMO_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. The only difference between <alertable_handle_events> and <handle_events> is that in the alertable case, TRUE is passed to <waitformultipleobjects> for the <balertable> option. Implements ACE_Reactor_Impl. Reimplemented in ACE_Msg_WFMO_Reactor.

ACE_INLINE int ACE_WFMO_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 timer events, I/O events, or signal 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.

<waitformultipleobjects> is used as the demultiplexing call

Returns the total number of I/O and timer ACE_Event_Handlers that were dispatched, 0 if the <max_wait_time> elapsed without dispatching any handlers, or -1 if an error occurs.

The only difference between <alertable_handle_events> and <handle_events> is that in the alertable case, TRUE is passed to <waitformultipleobjects> for the <balertable> option.

Implements ACE_Reactor_Impl.

Reimplemented in ACE_Msg_WFMO_Reactor.

ACE_INLINE int ACE_WFMO_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.

ACE_INLINE int ACE_WFMO_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.

ACE_INLINE int ACE_WFMO_Reactor::initialized | ( | void |  | ) | `[virtual]`

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

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

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

ACE_INLINE int ACE_WFMO_Reactor::mask_ops | ( | ACE_HANDLE | handle,
|  | ACE_Reactor_Mask | masks,
|  | int | ops
| ) | `[virtual]`

| Modify <masks> of the <handle>'s entry in WFMO_Reactor depending upon <operation>. <handle> must already have been registered with WFMO_Reactor. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_Reactor::mask_ops | ( | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | masks,
|  | int | operation
| ) | `[virtual]`

| Modify <masks> of the <event_handler>'s entry in WFMO_Reactor depending upon <operation>. <event_handler> must already have been registered with WFMO_Reactor. Implements ACE_Reactor_Impl.

int ACE_WFMO_Reactor::mask_ops_i | ( | ACE_HANDLE | io_handle,
|  | ACE_Reactor_Mask | masks,
|  | int | operation
| ) | `[protected, virtual]`

| Bit masking workhorse.

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

| Get the maximum number of times that the <ACE_WFMO_Reactor_Notify::handle_input> method 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_WFMO_Reactor::max_notify_iterations | ( | int |  | ) | `[virtual]`

Set the maximum number of times that the <ACE_WFMO_Reactor_Notify::handle_input> method 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.

ACE_INLINE int ACE_WFMO_Reactor::new_owner | ( | void |  | ) | `[protected, virtual]`

| Check to see if we have a new owner.

ACE_INLINE int ACE_WFMO_Reactor::notify | ( | ACE_Event_Handler * | = `0`,
|  | ACE_Reactor_Mask | = `ACE_Event_Handler::EXCEPT_MASK`,
|  | ACE_Time_Value * | = `0`
| ) | `[virtual]`

| Wakeup one <ace_wfmo_reactor> thread if it is currently blocked in <waitformultipleobjects>. The <ace_time_value> indicates how long to blocking trying to notify the <wfmo_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_Impl.

int ACE_WFMO_Reactor::ok_to_wait | ( | ACE_Time_Value * | max_wait_time,
|  | int | alertable
| ) | `[protected, virtual]`

| Check to see if it is ok to enter <::WaitForMultipleObjects>.

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

Initialize ACE_WFMO_Reactor with the specified size.

Parameters:

  | size | The maximum number of handles the reactor can register. The value should not exceed ACE_WFMO_Reactor::DEFAULT_SIZE. Two slots will be added to the size parameter which will store handles used for internal management purposes.

Implements ACE_Reactor_Impl.

ACE_WFMO_Reactor& ACE_WFMO_Reactor::operator= | ( | const ACE_WFMO_Reactor & |  | ) | `[private]`

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

| Return the ID of the "owner" thread. Implements ACE_Reactor_Impl.

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

| Transfers ownership of the WFMO_Reactor to the <new_owner>. The transfer will not complete until all threads are ready (just like the handle set). Implements ACE_Reactor_Impl.

ACE_INLINE ACE_thread_t ACE_WFMO_Reactor::owner_i | ( | void |  | ) | `[protected, virtual]`

| Return the ID of the "owner" thread. Does not do any locking.

DWORD ACE_WFMO_Reactor::poll_remaining_handles | ( | DWORD | slot | ) | `[protected, virtual]`

| Check for activity on remaining handles. Reimplemented in ACE_Msg_WFMO_Reactor.

int ACE_WFMO_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.

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

| Not implemented. Implements ACE_Reactor_Impl.

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

| Not implemented. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_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.

ACE_INLINE int ACE_WFMO_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.

ACE_INLINE int ACE_WFMO_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.

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

| This is a simple version of the above <register_handler> method where the I/O handle will always come from <get_handle> on the <event_handler> and the event handle will always be created by <wfmo_reactor> Implements ACE_Reactor_Impl.

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

| This is a simple version of the above <register_handler> method where the I/O handle is passed in and the event handle will always be created by <wfmo_reactor> Implements ACE_Reactor_Impl.

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

Register an ACE_Event_Handler <event_handle>. <mask> specifies the network events that the <event_handler> is interested in. If <io_handle> == <ace_invalid_handle> the <ace_wfmo_reactor> will call the <get_handle> method of <event_handler> to extract the underlying I/O handle. If the <event_handle> == <ace_invalid_handle>, WFMO_Reactor will create an event for associating it with the I/O handle. When the <event_handle> is signalled, the appropriate <handle_*> callback will be invoked on the <event_handler>

Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_Reactor::register_handler | ( | ACE_Event_Handler * | event_handler,
|  | ACE_HANDLE | event_handle = `ACE_INVALID_HANDLE`
| ) | `[virtual]`

Register an ACE_Event_Handler <event_handler>. Since no Event Mask is passed through this interface, it is assumed that the <handle> being passed in is an event handle and when the event becomes signaled, <wfmo_reactor> will call handle_signal on <event_handler>. If <handle> == <ace_invalid_handle> the <ace_wfmo_reactor> will call the <get_handle> method of <event_handler> to extract the underlying event handle.

Implements ACE_Reactor_Impl.

int ACE_WFMO_Reactor::register_handler_i | ( | ACE_HANDLE | event_handle,
|  | ACE_HANDLE | io_handle,
|  | ACE_Event_Handler * | event_handler,
|  | ACE_Reactor_Mask | mask
| ) | `[protected, virtual]`

| Registration workhorse.

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

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

ACE_INLINE int ACE_WFMO_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>. <sigkey> is ignored in this implementation since there is only one instance of a signal handler. 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.

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

| Removes all the <mask> bindings for handles in the <handle_set> bind of <event_handler>. If there are no more bindings for any of these handles then they are removed from WFMO_Reactor. Implements ACE_Reactor_Impl.

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

Removes <handle> from the <ace_wfmo_reactor>. If <mask> == <ACE_Event_Handler::DONT_CALL> then the <handle_close> method of the <event_handler> is not invoked. Note that the <handle> can either be the <event_handle> or the <io_handle>

For the case of I/O entries, this removes the <mask> binding of <event_handler> whose handle is <handle> from <wfmo_reactor>. If there are no more bindings for this <event_handler> then it is removed from the WFMO_Reactor. For simple event entries, mask is mostly ignored and the <event_handler> is always removed from <wfmo_reactor>

Implements ACE_Reactor_Impl.

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

| Removes <event_handler> from the <ace_wfmo_reactor>. Note that the <ace_wfmo_reactor> will call the <get_handle> method of <event_handler> to extract the underlying handle. If <mask> == <ACE_Event_Handler::DONT_CALL> then the <handle_close> method of the <event_handler> is not invoked. Note that the <handle> can either be the <event_handle> or the <io_handle> Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_Reactor::requeue_position | ( | void |  | ) | `[virtual]`

| Not implemented. Implements ACE_Reactor_Impl.

ACE_INLINE void ACE_WFMO_Reactor::requeue_position | ( | int |  | ) | `[virtual]`

| Not implemented. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_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.

ACE_INLINE int ACE_WFMO_Reactor::restart | ( | int | r | ) | `[virtual]`

| Set a new value for restart and return the original value. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_Reactor::restart | ( | void |  | ) | `[virtual]`

| Get the existing restart value. Implements ACE_Reactor_Impl.

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

| Does the reactor allow the application to resume the handle on its own ie. can it pass on the control of handle resumption to the application. A positive value indicates that the handlers are application resumable. A value of 0 indicates otherwise. Implements ACE_Reactor_Impl.

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

| Resume all <handles> in handle set. Implements ACE_Reactor_Impl.

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

| Resume <handle>. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_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.

ACE_INLINE int ACE_WFMO_Reactor::resume_handlers | ( | void |  | ) | `[virtual]`

| Resume all <handles>. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_Reactor::safe_dispatch | ( | DWORD | wait_status | ) | `[protected, virtual]`

| Protect against structured exceptions caused by user code when dispatching handles

ACE_INLINE long ACE_WFMO_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 after which the timer will be automatically rescheduled

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

Implements ACE_Reactor_Impl.

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

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

ACE_INLINE int ACE_WFMO_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 in WFMO_Reactor. <event_handler> must already have been registered with WFMO_Reactor. Implements ACE_Reactor_Impl.

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

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

int ACE_WFMO_Reactor::simple_dispatch_handler | ( | DWORD | slot,
|  | ACE_HANDLE | event_handle
| ) | `[protected, virtual]`

| Dispatches a single handler. Returns 0 on success, -1 if the handler was removed.

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

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

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

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

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

| Suspend <handle> temporarily. Implements ACE_Reactor_Impl.

ACE_INLINE int ACE_WFMO_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.

ACE_INLINE int ACE_WFMO_Reactor::suspend_handlers | ( | void |  | ) | `[virtual]`

| Suspend all <handles> temporarily. Implements ACE_Reactor_Impl.

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

| Return the current ACE_Timer_Queue. Implements ACE_Reactor_Impl.

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

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

ACE_Reactor_Mask ACE_WFMO_Reactor::upcall | ( | ACE_Event_Handler * | event_handler,
|  | ACE_HANDLE | io_handle,
|  | WSANETWORKEVENTS & | events
| ) | `[protected, virtual]`

int ACE_WFMO_Reactor::update_state | ( | void |  | ) | `[protected, virtual]`

| Update the state of the handler repository.

ACE_INLINE int ACE_WFMO_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. Since the WFMO_Reactor does use event associations, this function always return 1. Implements ACE_Reactor_Impl.

DWORD ACE_WFMO_Reactor::wait_for_multiple_events | ( | int | timeout,
|  | int | alertable
| ) | `[protected, virtual]`

| Wait for timer and I/O events to occur. Reimplemented in ACE_Msg_WFMO_Reactor.

ACE_INLINE void ACE_WFMO_Reactor::wakeup_all_threads | ( | void |  | ) | `[virtual]`

| Wake up all threads in WaitForMultipleObjects so that they can reconsult the handle set Implements ACE_Reactor_Impl.

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

| This method is not currently implemented. We recommend that you use handle_events (ACE_Time_Value::zero) to get basically the same effect, i.e., it won't block the caller if there are no events. Implements ACE_Reactor_Impl.

## Friends And Related Function Documentation

friend class ACE_WFMO_Reactor_Handler_Repository`[friend]`

friend class ACE_WFMO_Reactor_Test`[friend]`

## Member Data Documentation

ACE_WFMO_Reactor::ACE_ALLOC_HOOK_DECLARE

| Declare the dynamic allocation hooks. Reimplemented from ACE_Reactor_Impl.

size_t ACE_WFMO_Reactor::active_threads_`[protected]`

| Count of currently active threads.

ACE_HANDLE ACE_WFMO_Reactor::atomic_wait_array_[2]`[protected]`

| This is an array of ACE_HANDLEs which keep track of the <lock_> and <ok_to_wait_> handles

ACE_thread_t ACE_WFMO_Reactor::change_state_thread_`[protected]`

| This is the thread which is responsible for the changing the state of the <wfmo_reactor> handle set

sig_atomic_t ACE_WFMO_Reactor::deactivated_`[protected]`

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

int ACE_WFMO_Reactor::delete_handler_rep_`[protected]`

| Keeps track of whether we should delete the handler repository.

int ACE_WFMO_Reactor::delete_notify_handler_`[protected]`

| Keeps track of whether we should delete the notify handler.

int ACE_WFMO_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_WFMO_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).

ACE_WFMO_Reactor_Handler_Repository ACE_WFMO_Reactor::handler_rep_`[protected]`

| Table that maps <ace_handles> to <ACE_Event_Handler *>'s.

ACE_Process_Mutex ACE_WFMO_Reactor::lock_`[protected]`

| Synchronization for the ACE_WFMO_Reactor. A Process Mutex is used here because of two reasons: (a) The implementation of ACE_Thread_Mutex uses CriticalSections CriticalSections are not waitable using ::WaitForMultipleObjects (b) This is really not a process mutex because it is not named. No other process can use this mutex.

ACE_Lock_Adapter<ACE_Process_Mutex> ACE_WFMO_Reactor::lock_adapter_`[protected]`

| Adapter used to return internal lock to outside world.

ACE_thread_t ACE_WFMO_Reactor::new_owner_`[protected]`

| The owner to be of the WFMO_Reactor.

ACE_Reactor_Notify* ACE_WFMO_Reactor::notify_handler_`[protected]`

| Used when <notify> is called.

ACE_Manual_Event ACE_WFMO_Reactor::ok_to_wait_`[protected]`

| A manual event used to block threads from proceeding into WaitForMultipleObjects

int ACE_WFMO_Reactor::open_for_business_`[protected]`

| This flag is used to keep track of whether we are already closed.

ACE_thread_t ACE_WFMO_Reactor::owner_`[protected]`

| The thread which is "owner" of the WFMO_Reactor. The owner concept is used because we don't want multiple threads to try to expire timers. Therefore the "owner" thread is the only one allowed to expire timers. Also, the owner thread is the only thread which waits on the notify handle. Note that the ownership can be transferred.

ACE_Sig_Handler* ACE_WFMO_Reactor::signal_handler_`[protected]`

| Handle signals without requiring global/static variables.

ACE_Timer_Queue* ACE_WFMO_Reactor::timer_queue_`[protected]`

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

ACE_Auto_Event ACE_WFMO_Reactor::waiting_to_change_state_`[protected]`

| The changing thread waits on this event, till all threads are not active anymore

ACE_Manual_Event ACE_WFMO_Reactor::wakeup_all_threads_`[protected]`

| A manual event is used so that we can wake everyone up (e.g., when <ace_event_handlers> are bounded and unbound from the handler repository).

ACE_Wakeup_All_Threads_Handler ACE_WFMO_Reactor::wakeup_all_threads_handler_`[protected]`

| Used when <wakeup_all_threads_> is signaled.

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

- WFMO_Reactor.h
- WFMO_Reactor.cpp
- WFMO_Reactor.inl