Adapts an ACE timer queue to be driven asynchronously using signals. More...

#include <Timer_Queue_Adapters.h>

Inheritance diagram for ACE_Async_Timer_Queue_Adapter< TQ, TYPE >:

Collaboration diagram for ACE_Async_Timer_Queue_Adapter< TQ, TYPE >:

Public Types
typedef TQ	TIMER_QUEUE

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.

Public Member Functions
	ACE_Async_Timer_Queue_Adapter (ACE_Sig_Set *mask=0)
	Constructor.

long	schedule (TYPE type, const void *act, const ACE_Time_Value &future_time, const ACE_Time_Value &interval=ACE_Time_Value::zero)

int	cancel (long timer_id, const void **act=0)

int	expire (void)

TQ &	timer_queue (void)
	Return a reference to the underlying timer queue.

Public Member Functions inherited from ACE_Event_Handler
virtual	~ACE_Event_Handler (void)
	Destructor is virtual to enable proper cleanup.

virtual ACE_HANDLE	get_handle (void) const
	Get the I/O handle.

virtual void	set_handle (ACE_HANDLE)
	Set the I/O handle.

virtual int	priority (void) const

virtual void	priority (int priority)
	Set the priority of the Event_Handler.

virtual int	handle_input (ACE_HANDLE fd=ACE_INVALID_HANDLE)
	Called when input events occur (e.g., connection or data).

virtual int	handle_output (ACE_HANDLE fd=ACE_INVALID_HANDLE)

virtual int	handle_exception (ACE_HANDLE fd=ACE_INVALID_HANDLE)
	Called when an exceptional events occur (e.g., SIGURG).

virtual int	handle_timeout (const ACE_Time_Value &current_time, const void *act=0)

virtual int	handle_exit (ACE_Process *)
	Called when a process exits.

virtual int	handle_close (ACE_HANDLE handle, ACE_Reactor_Mask close_mask)

virtual int	resume_handler (void)

virtual int	handle_qos (ACE_HANDLE=ACE_INVALID_HANDLE)

virtual int	handle_group_qos (ACE_HANDLE=ACE_INVALID_HANDLE)

virtual void	reactor (ACE_Reactor *reactor)
	Set the event demultiplexors.

virtual ACE_Reactor *	reactor (void) const
	Get the event demultiplexors.

virtual ACE_Reactor_Timer_Interface *	reactor_timer_interface (void) const
	Get only the reactor's timer related interface.

virtual Reference_Count	add_reference (void)
	Increment reference count on the handler.

virtual Reference_Count	remove_reference (void)
	Decrement reference count on the handler.

Reference_Counting_Policy &	reference_counting_policy (void)
	Current Reference_Counting_Policy.

Private Member Functions
virtual int	schedule_ualarm (void)
	Perform the logic to compute the new ualarm(2) setting.

virtual int	handle_signal (int signum, siginfo_t , ucontext_t )
	Called back by `SIGALRM` handler.

Private Attributes
ACE_Sig_Handler	sig_handler_

TQ	timer_queue_

ACE_Sig_Set	mask_
	Mask of signals to be blocked when we're servicing `SIGALRM`.

Additional Inherited Members
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.

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.

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.

Protected Attributes inherited from ACE_Event_Handler
Atomic_Reference_Count	reference_count_
	Reference count.

Detailed Description

template<class TQ, class TYPE = ACE_Event_Handler*>
class ACE_Async_Timer_Queue_Adapter< TQ, TYPE >

Adapts an ACE timer queue to be driven asynchronously using signals.

This implementation uses the ACE_OS::ualarm call, to generate the SIGARLM signal that is caught by this class.

Note: This adapter only works on platforms that support ualarm(). POSIX platforms generally do; Windows and some others do not.

Todo:: This adapter does not automatically reschedule repeating timers.