TAO_RTEvent: TAO_EC_Conjunction_Filter Class Reference

typedef unsigned int TAO_EC_Conjunction_Filter::Word

Definition at line 71 of file EC_Conjunction_Filter.h.

TAO_EC_Conjunction_Filter::TAO_EC_Conjunction_Filter	(	TAO_EC_Filter *	children[],
		size_t	n
	)

Constructor. It assumes ownership of both the array and the children.

Definition at line 12 of file EC_Conjunction_Filter.cpp.

References ACE_NEW, and bits_per_word.

00014   :  children_ (children),
00015      n_ (n)
00016 {
00017   ChildrenIterator end = this->end ();
00018   for (ChildrenIterator i = this->begin ();
00019        i != end;
00020        ++i)
00021     {
00022       this->adopt_child (*i);
00023     }
00024 
00025   this->nwords_ = this->n_ / bits_per_word + 1;
00026   ACE_NEW (this->bitvec_, Word[this->nwords_]);
00027 
00028   this->clear ();
00029 }

TAO_EC_Conjunction_Filter::~TAO_EC_Conjunction_Filter ( void ) [virtual]

Destructor.

Definition at line 31 of file EC_Conjunction_Filter.cpp.

References bitvec_, children_, end(), and n_.

00032 {
00033   TAO_EC_Filter** end = this->children_ + this->n_;
00034   for (TAO_EC_Filter** i = this->children_;
00035        i != end;
00036        ++i)
00037     {
00038       delete *i;
00039       *i = 0;
00040     }
00041   delete[] this->children_;
00042   this->children_ = 0;
00043   this->n_ = 0;
00044 
00045   delete[] this->bitvec_;
00046   this->bitvec_ = 0;
00047 }

TAO_EC_Conjunction_Filter::TAO_EC_Conjunction_Filter ( const TAO_EC_Conjunction_Filter & ) [private]

int TAO_EC_Conjunction_Filter::add_dependencies	(	const RtecEventComm::EventHeader &	header,
		const TAO_EC_QOS_Info &	qos_info
	)			`[virtual]`

This is used for computing the scheduling dependencies:

Leaf filters check if the header could be matched, similar to the can_match() method; if it does they return 1, and 0 otherwise. Intermediate nodes always return 0.

This is used to build precise dependencies between the suppliers and the leaf of the filters that accept that event. Notice that only the nodes doing scheduling recurse through the list, so in configurations that do no require scheduling the recursion stops fairly soon.

Implements TAO_EC_Filter.

Definition at line 195 of file EC_Conjunction_Filter.cpp.

00198 {
00199   return 0;
00200 }

int TAO_EC_Conjunction_Filter::all_received ( void ) const [private]

Determine if all the children have received their events.

Definition at line 50 of file EC_Conjunction_Filter.cpp.

References bitvec_, and nwords_.

00051 {
00052   Word* i = this->bitvec_;
00053   for (;
00054        i != this->bitvec_ + this->nwords_;
00055        ++i)
00056     {
00057       if (*i != static_cast<Word> (~0))
00058         return 0;
00059     }
00060   return 1;
00061 }

TAO_EC_Filter::ChildrenIterator TAO_EC_Conjunction_Filter::begin ( void ) const [virtual]

STL-like iterators Filters follow the Composite pattern. All filters expose the same interface as if they all had children, but for simple filters the iterators return an empty range.

Reimplemented from TAO_EC_Filter.

Definition at line 64 of file EC_Conjunction_Filter.cpp.

References children_.

Referenced by push().

00065 {
00066   return this->children_;
00067 }

int TAO_EC_Conjunction_Filter::can_match ( const RtecEventComm::EventHeader & header ) const [virtual]

Returns 0 if an event with that header could never be accepted. This can used by the suppliers to filter out consumers that couldn't possibly be interested in their events. The rt_info and

Implements TAO_EC_Filter.

Definition at line 180 of file EC_Conjunction_Filter.cpp.

References end().

00182 {
00183   ChildrenIterator end = this->end ();
00184   for (ChildrenIterator i = this->begin ();
00185        i != end;
00186        ++i)
00187     {
00188       if ((*i)->can_match (header) != 0)
00189         return 1;
00190     }
00191   return 0;
00192 }

void TAO_EC_Conjunction_Filter::clear ( void ) [virtual]

Clear any saved state, must reset and assume no events have been received.

Implements TAO_EC_Filter.

Definition at line 142 of file EC_Conjunction_Filter.cpp.

References bits_per_word, bitvec_, end(), event_, n_, and nwords_.

00143 {
00144   ChildrenIterator end = this->end ();
00145   for (ChildrenIterator i = this->begin ();
00146        i != end;
00147        ++i)
00148     {
00149       (*i)->clear ();
00150     }
00151   Word* j = this->bitvec_;
00152   for (;
00153        j != this->bitvec_ + this->nwords_ - 1;
00154        ++j)
00155     {
00156       *j = 0;
00157     }
00158   int b = static_cast<int> (this->n_ % bits_per_word);
00159   Word last = ~0 << b;
00160   *j = last;
00161 
00162   this->event_.length (0);
00163 }

TAO_EC_Filter::ChildrenIterator TAO_EC_Conjunction_Filter::end ( void ) const [virtual]

Reimplemented from TAO_EC_Filter.

Definition at line 70 of file EC_Conjunction_Filter.cpp.

References children_, and n_.

Referenced by can_match(), clear(), filter(), filter_nocopy(), max_event_size(), and ~TAO_EC_Conjunction_Filter().

00071 {
00072   return this->children_ + this->n_;
00073 }

int TAO_EC_Conjunction_Filter::filter	(	const RtecEventComm::EventSet &	event,
		TAO_EC_QOS_Info &	qos_info
	)			`[virtual]`

Filter this event, returns 1 if the event is accepted, 0 otherwise. Notice that there are two versions of the method, if the event is not const then filter can take ownership of the event.

Attention:: There seems to be a disparity in interfaces: Supplier always push event sets of size 1 to the EC_ProxyPushSupplier, and EC_Filters do not implement handling of sets of more than 1 event. Then, why is this not enforced by the interface by having EC_ProxyPushSupplier take an event rather than a set?

Implements TAO_EC_Filter.

Definition at line 82 of file EC_Conjunction_Filter.cpp.

References current_child_, and end().

00084 {
00085   ChildrenIterator end = this->end ();
00086   for (this->current_child_ = this->begin ();
00087        this->current_child_ != end;
00088        ++this->current_child_)
00089     {
00090       int n = (*this->current_child_)->filter (event, qos_info);
00091       if (n != 0)
00092         return n;
00093     }
00094   return 0;
00095 }

int TAO_EC_Conjunction_Filter::filter_nocopy	(	RtecEventComm::EventSet &	event,
		TAO_EC_QOS_Info &	qos_info
	)			`[virtual]`

Implements TAO_EC_Filter.

Definition at line 98 of file EC_Conjunction_Filter.cpp.

References end().

00100 {
00101   ChildrenIterator end = this->end ();
00102   for (ChildrenIterator i = this->begin ();
00103        i != end;
00104        ++i)
00105     {
00106       int n = (*i)->filter_nocopy (event, qos_info);
00107       if (n != 0)
00108         return n;
00109     }
00110   return 0;
00111 }

CORBA::ULong TAO_EC_Conjunction_Filter::max_event_size ( void ) const [virtual]

Returns the maximum size of the events pushed by this filter.

Implements TAO_EC_Filter.

Definition at line 166 of file EC_Conjunction_Filter.cpp.

References end().

00167 {
00168   CORBA::ULong n = 0;
00169   ChildrenIterator end = this->end ();
00170   for (ChildrenIterator i = this->begin ();
00171        i != end;
00172        ++i)
00173     {
00174       n += (*i)->max_event_size ();
00175     }
00176   return n;
00177 }

TAO_EC_Conjunction_Filter& TAO_EC_Conjunction_Filter::operator= ( const TAO_EC_Conjunction_Filter & ) [private]

void TAO_EC_Conjunction_Filter::push	(	const RtecEventComm::EventSet &	event,
		TAO_EC_QOS_Info &	qos_info
	)			`[virtual]`

This is called by the children when they accept an event and which to pass it up. Notice that there are two versions of the method, if the event is not const then filter can take ownership of the event.

Implements TAO_EC_Filter.

Definition at line 114 of file EC_Conjunction_Filter.cpp.

References ACE_BIT_ENABLED, ACE_SET_BITS, begin(), bits_per_word, current_child_, event_, and TAO_EC_Filter::parent().

Referenced by push_nocopy().

00116 {
00117   CORBA::Long pos = this->current_child_ - this->begin ();
00118   int w = pos / bits_per_word;
00119   int b = pos % bits_per_word;
00120   if (ACE_BIT_ENABLED (this->bitvec_[w], 1<<b))
00121     return;
00122   ACE_SET_BITS (this->bitvec_[w], 1<<b);
00123   CORBA::ULong n = event.length ();
00124   CORBA::ULong l = this->event_.length ();
00125   this->event_.length (l + n);
00126   for (CORBA::ULong i = 0; i != n; ++i)
00127     {
00128       this->event_[l + i] = event[i];
00129     }
00130   if (this->all_received () && this->parent () != 0)
00131     this->parent ()->push_nocopy (this->event_, qos_info);
00132 }

void TAO_EC_Conjunction_Filter::push_nocopy	(	RtecEventComm::EventSet &	event,
		TAO_EC_QOS_Info &	qos_info
	)			`[virtual]`

Implements TAO_EC_Filter.

Definition at line 135 of file EC_Conjunction_Filter.cpp.

References push().

00137 {
00138   this->push (event, qos_info);
00139 }

int TAO_EC_Conjunction_Filter::size ( void ) const [virtual]

Reimplemented from TAO_EC_Filter.

Definition at line 76 of file EC_Conjunction_Filter.cpp.

References n_.

00077 {
00078   return static_cast<int> (this->n_);
00079 }

Word* TAO_EC_Conjunction_Filter::bitvec_ [private]

The bit vector to keep track of the children that have received their events.

Definition at line 99 of file EC_Conjunction_Filter.h.

Referenced by all_received(), clear(), and ~TAO_EC_Conjunction_Filter().

TAO_EC_Filter** TAO_EC_Conjunction_Filter::children_ [private]

The children.

Definition at line 82 of file EC_Conjunction_Filter.h.

Referenced by begin(), end(), and ~TAO_EC_Conjunction_Filter().

ChildrenIterator TAO_EC_Conjunction_Filter::current_child_ [private]

The current child in the iteration, used in the push() method...

Definition at line 102 of file EC_Conjunction_Filter.h.

Referenced by filter(), and push().

RtecEventComm::EventSet TAO_EC_Conjunction_Filter::event_ [private]

The event we send up (once all the children have pushed theirs).

Definition at line 88 of file EC_Conjunction_Filter.h.

Referenced by clear(), and push().

size_t TAO_EC_Conjunction_Filter::n_ [private]

The number of children.

Definition at line 85 of file EC_Conjunction_Filter.h.

Referenced by clear(), end(), size(), and ~TAO_EC_Conjunction_Filter().

size_t TAO_EC_Conjunction_Filter::nwords_ [private]

The number of words in the bit vector

Definition at line 93 of file EC_Conjunction_Filter.h.

Referenced by all_received(), and clear().


Public Types
typedef unsigned int	Word
Public Member Functions
	TAO_EC_Conjunction_Filter (TAO_EC_Filter *children[], size_t n)
virtual	~TAO_EC_Conjunction_Filter (void)
	Destructor.
virtual ChildrenIterator	begin (void) const
virtual ChildrenIterator	end (void) const
virtual int	size (void) const
virtual int	filter (const RtecEventComm::EventSet &event, TAO_EC_QOS_Info &qos_info)
virtual int	filter_nocopy (RtecEventComm::EventSet &event, TAO_EC_QOS_Info &qos_info)
virtual void	push (const RtecEventComm::EventSet &event, TAO_EC_QOS_Info &qos_info)
virtual void	push_nocopy (RtecEventComm::EventSet &event, TAO_EC_QOS_Info &qos_info)
virtual void	clear (void)
virtual CORBA::ULong	max_event_size (void) const
	Returns the maximum size of the events pushed by this filter.
virtual int	can_match (const RtecEventComm::EventHeader &header) const
virtual int	add_dependencies (const RtecEventComm::EventHeader &header, const TAO_EC_QOS_Info &qos_info)
Private Member Functions
int	all_received (void) const
	Determine if all the children have received their events.
	TAO_EC_Conjunction_Filter (const TAO_EC_Conjunction_Filter &)
TAO_EC_Conjunction_Filter &	operator= (const TAO_EC_Conjunction_Filter &)
Private Attributes
TAO_EC_Filter **	children_
	The children.
size_t	n_
	The number of children.
RtecEventComm::EventSet	event_
	The event we send up (once all the children have pushed theirs).
size_t	nwords_
Word *	bitvec_
ChildrenIterator	current_child_
	The current child in the iteration, used in the push() method...

TAO_EC_Conjunction_Filter Class Reference

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Memory Management

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation