ACE_Task<> Class Template Reference

Primary interface for application message processing, as well as input and output message queueing. More...

#include <Task_T.h>

Inheritance diagram for ACE_Task<>:

[legend]Collaboration diagram for ACE_Task<>:


Public Member Functions
	ACE_Task (ACE_Thread_Manager thr_mgr=0, ACE_Message_Queue< ACE_SYNCH_USE > mq=0)
virtual	~ACE_Task (void)
	Destructor.
ACE_Message_Queue< ACE_SYNCH_USE > *	msg_queue (void)
	Gets the message queue associated with this task.
void	msg_queue (ACE_Message_Queue< ACE_SYNCH_USE > *)
	Sets the message queue associated with this task.
int	putq (ACE_Message_Block , ACE_Time_Value timeout=0)
int	getq (ACE_Message_Block &mb, ACE_Time_Value timeout=0)
int	ungetq (ACE_Message_Block , ACE_Time_Value timeout=0)
int	reply (ACE_Message_Block , ACE_Time_Value timeout=0)
int	put_next (ACE_Message_Block msg, ACE_Time_Value timeout=0)
int	can_put (ACE_Message_Block *)
const ACE_TCHAR *	name (void) const
ACE_Task< ACE_SYNCH_USE > *	next (void)
	Get next Task pointer.
void	next (ACE_Task< ACE_SYNCH_USE > *)
	Set next Task pointer.
ACE_Task< ACE_SYNCH_USE > *	sibling (void)
ACE_Module< ACE_SYNCH_USE > *	module (void) const
	Return the Task's Module if there is one, else returns 0.
int	flush (u_long flag=ACE_Task_Flags::ACE_FLUSHALL)
void	water_marks (ACE_IO_Cntl_Msg::ACE_IO_Cntl_Cmds, size_t)
	Manipulate watermarks.
void	dump (void) const
	Dump the state of an object.
Public Attributes
ACE_Message_Queue< ACE_SYNCH_USE > *	msg_queue_
	Queue of messages on the ACE_Task..
bool	delete_msg_queue_
	true if should delete Message_Queue, false otherwise.
ACE_Module< ACE_SYNCH_USE > *	mod_
	Back-pointer to the enclosing module.
ACE_Task< ACE_SYNCH_USE > *	next_
	Pointer to adjacent ACE_Task.
	ACE_ALLOC_HOOK_DECLARE
	Declare the dynamic allocation hooks.
Private Member Functions
void	operator= (const ACE_Task< _ACE_SYNCH_MUTEX_T, _ACE_SYNCH_CONDITION_T > &)
	ACE_Task (const ACE_Task< _ACE_SYNCH_MUTEX_T, _ACE_SYNCH_CONDITION_T > &)
Friends
class	ACE_Module< ACE_SYNCH_USE >
class	ACE_Module_Type

Detailed Description

template<ACE_SYNCH_DECL>
class ACE_Task<>

Primary interface for application message processing, as well as input and output message queueing.

This class serves as the basis for passive and active objects in ACE.

Definition at line 42 of file Task_T.h.

Constructor & Destructor Documentation

template<ACE_SYNCH_DECL >

ACE_Task<>::ACE_Task	(	ACE_Thread_Manager *	thr_mgr = `0`,
		ACE_Message_Queue< ACE_SYNCH_USE > *	mq = `0`
	)

Initialize a Task, supplying a thread manager and a message queue. If the user doesn't supply a ACE_Message_Queue pointer then we'll allocate one dynamically. Otherwise, we'll use the one passed as a parameter.

template<ACE_SYNCH_DECL >

virtual ACE_Task<>::~ACE_Task ( void ) [virtual]

Destructor.

template<ACE_SYNCH_DECL >

ACE_Task<>::ACE_Task ( const ACE_Task< _ACE_SYNCH_MUTEX_T, _ACE_SYNCH_CONDITION_T > & ) [private]

Member Function Documentation

template<ACE_SYNCH_DECL >

int ACE_Task<>::can_put ( ACE_Message_Block * )

Tests whether we can enqueue a message without blocking.

Deprecated:: This method is deprecated and will go away in the future.

template<ACE_SYNCH_DECL >

void ACE_Task<>::dump ( void ) const

Dump the state of an object.

Reimplemented in ACE_Stream_Head<>, ACE_Stream_Tail<>, ACE_Thru_Task<>, ACE_Svc_Handler<, >, ACE_Buffered_Svc_Handler<, >, and ACE_Svc_Handler< ACE_PEER_STREAM_2, ACE_SYNCH_USE >.

Referenced by ACE_Stream<>::dump().

template<ACE_SYNCH_DECL >

int ACE_Task<>::flush ( u_long flag = ACE_Task_Flags::ACE_FLUSHALL )

Flush the task's queue, i.e., free all of the enqueued message blocks and unblocks any threads waiting on the queue. Note that if this conflicts with the C++ iostream <flush> function, just rewrite the iostream function as ::<flush>.

Referenced by ACE_Stream_Tail<>::canonical_flush(), and ACE_Module< ACE_SYNCH_USE >::close_i().

template<ACE_SYNCH_DECL >

int ACE_Task<>::getq	(	ACE_Message_Block *&	mb,
		ACE_Time_Value *	timeout = `0`
	)

Extract the first message from the queue (blocking). Note that timeout uses <{absolute}> time rather than <{relative}> time. Returns number of items in queue if the call succeeds or -1 otherwise.

Referenced by ACE_Stream<>::get().

template<ACE_SYNCH_DECL >

ACE_Module<ACE_SYNCH_USE>* ACE_Task<>::module ( void ) const

Return the Task's Module if there is one, else returns 0.

template<ACE_SYNCH_DECL >

void ACE_Task<>::msg_queue ( ACE_Message_Queue< ACE_SYNCH_USE > * )

Sets the message queue associated with this task.

template<ACE_SYNCH_DECL >

ACE_Message_Queue<ACE_SYNCH_USE>* ACE_Task<>::msg_queue ( void )

Gets the message queue associated with this task.

template<ACE_SYNCH_DECL >

const ACE_TCHAR* ACE_Task<>::name ( void ) const

Return the name of the enclosing Module if there's one associated with the Task, else returns 0.

Referenced by ACE_Stream<>::dump().

template<ACE_SYNCH_DECL >

void ACE_Task<>::next ( ACE_Task< ACE_SYNCH_USE > * )

Set next Task pointer.

template<ACE_SYNCH_DECL >

ACE_Task<ACE_SYNCH_USE>* ACE_Task<>::next ( void )

Get next Task pointer.

Referenced by ACE_Module< ACE_SYNCH_USE >::close_i(), ACE_Stream<>::dump(), ACE_Module< ACE_SYNCH_USE >::link(), ACE_Stream<>::link_i(), ACE_Stream<>::pop(), ACE_Stream<>::push_module(), ACE_Stream<>::replace(), and ACE_Stream<>::unlink_i().

template<ACE_SYNCH_DECL >

void ACE_Task<>::operator= ( const ACE_Task< _ACE_SYNCH_MUTEX_T, _ACE_SYNCH_CONDITION_T > & ) [private]

template<ACE_SYNCH_DECL >

int ACE_Task<>::put_next	(	ACE_Message_Block *	msg,
		ACE_Time_Value *	timeout = `0`
	)

Transfer message to the adjacent ACE_Task in a ACE_Stream. Note that timeout uses <{absolute}> time rather than <{relative}> time.

Referenced by ACE_Task< ACE_SYNCH_USE >::reply().

template<ACE_SYNCH_DECL >

int ACE_Task<>::putq	(	ACE_Message_Block *	,
		ACE_Time_Value *	timeout = `0`
	)

Insert message into the message queue. Note that timeout uses <{absolute}> time rather than <{relative}> time.

template<ACE_SYNCH_DECL >

int ACE_Task<>::reply	(	ACE_Message_Block *	,
		ACE_Time_Value *	timeout = `0`
	)

Turn the message around, sending it in the opposite direction in the stream. To do this, the message is put onto the task next in the stream after this task's sibling.

Parameters:

	ACE_Message_Block	Pointer to the block that is used in the reply.
	timeout	The absolute time at which the put operation used to send the message block to the next module in the stream will time out. If 0, this call blocks until it can be completed.

template<ACE_SYNCH_DECL >

ACE_Task<ACE_SYNCH_USE>* ACE_Task<>::sibling ( void )

Return the Task's sibling if there's one associated with the Task's Module, else returns 0.

Referenced by ACE_Task< ACE_SYNCH_USE >::reply().

template<ACE_SYNCH_DECL >