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/*
* DNN - Data News Network
*
* by Stephane Chatty
*
* Copyright 1993-1996
* Centre d'Etudes de la Navigation Aerienne (CENA)
*
* Event sources.
*
* $Id$
* $CurLog$
*/
#include "Source.h"
#include "Trigger.h"
#include "Reaction.h"
#include "ivl/Array.h"
#include "ivl/HashTable.h"
IvlEventSource :: IvlEventSource ()
{
}
IvlEventSource :: ~IvlEventSource ()
{
}
void
IvlEventSource :: Emit (IvlEvent* ev)
{
/* should enqueue? */
DispatchEvent (ev);
}
IvlEventSelector :: IvlEventSelector ()
{
}
IvlEventSelector :: ~IvlEventSelector ()
{
}
IvlEventIntSelector :: IvlEventIntSelector (IvlIntExtractor exid, int max)
: IvlEventSelector (),
IdExtractor (exid),
MaxSize (max),
Triggers (0)
{
}
IvlEventIntSelector :: ~IvlEventIntSelector ()
{
if (Triggers) {
int id = 0;
#ifdef FIXME
while (id < MaxSize) {
IvlTrigger* t = (*Triggers)[id];
if (t)
delete t;
}
#endif
}
}
IvlTrigger*
IvlEventIntSelector :: UseTrigger (int id)
{
if (!Triggers && MaxSize) {
Triggers = new IvlArrayOf<IvlTrigger> (MaxSize, 0);
}
/* no need to check bounds: IvlArray does it */
IvlTrigger** t = *Triggers + id;
if (*t == 0) {
*t = new IvlTrigger;
}
return *t;
}
void
IvlEventIntSelector :: UnuseTrigger (int id, IvlBaseReaction* r)
{
IvlTrigger** t;
if (!Triggers || !(t = *Triggers + id))
return;
r->UnsubscribeTo (**t);
if ((*t)->IsUnused ()) {
delete *t;
*t = 0;
}
}
IvlTrigger*
IvlEventIntSelector :: FindTrigger (IvlEvent* ev)
{
IvlTrigger* t = 0;
int id = (IdExtractor) (ev);
if (Triggers)
t = (*Triggers) [id];
return t;
}
IvlEventPtrSelector :: IvlEventPtrSelector (IvlPtrExtractor exid, int sz)
: IvlEventSelector (),
PtrExtractor (exid),
TblSize (sz),
Triggers (0)
{
}
IvlEventPtrSelector :: ~IvlEventPtrSelector ()
{
if (Triggers) {
int id = 0;
#ifdef FIXME
#endif
}
}
IvlTrigger*
IvlEventPtrSelector :: UseTrigger (void* id)
{
if (!Triggers && TblSize) {
Triggers = new IvlHashTableOf<IvlTrigger> (TblSize);
}
int found;
IvlHashCellOf<IvlTrigger>* c = Triggers->Add (id, &found);
IvlTrigger* t;
if (found)
t = c->GetInfo ();
else
c->SetInfo (t = new IvlTrigger);
return t;
}
void
IvlEventPtrSelector :: UnuseTrigger (void* id, IvlBaseReaction* r)
{
IvlHashCellOf<IvlTrigger>* c;
if (!Triggers || !(c = Triggers->Get (id)))
return;
IvlTrigger* t = c->GetInfo ();
r->UnsubscribeTo (*t);
if (t->IsUnused ()) {
delete t;
/* not optimal : we already had the cell */
Triggers->Remove (id);
}
}
IvlTrigger*
IvlEventPtrSelector :: FindTrigger (IvlEvent* ev)
{
IvlTrigger* t = 0;
IvlHashCellOf<IvlTrigger>* c;
void* id = (PtrExtractor) (ev);
if (Triggers && (c = Triggers->Get (id)))
t = c->GetInfo ();
return t;
}
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