void LIFOPool::insert(Task* t) {
Lifo::Node* n = new Lifo::Node();
n->task = t;
stack->push(n);
FAA(&size, 1);
}
/* DripBack process a record. */
void SNetNodeDripBack(snet_stream_desc_t *desc, snet_record_t *rec)
{
landing_t *land = desc->landing;
dripback_arg_t *darg = LAND_NODE_SPEC(land, dripback);
trace(__func__);
if (land->type == LAND_dripback1) {
landing_dripback1_t *db1 = LAND_SPEC(land, dripback1);
landing_dripback2_t *db2 = LAND_SPEC(db1->dripback2, dripback2);
SNetFifoPut(db1->recfifo, rec);
if (FAA(&db2->queued, 1) == 0) {
if (db1->controldesc == NULL) {
SNetPushLanding(desc, db1->dripback2);
db1->controldesc = SNetStreamOpen(darg->selfref, desc);
}
rec = SNetRecCreate(REC_wakeup);
SNetWrite(&db1->controldesc, rec, true);
}
}
else if (land->type == LAND_dripback2) {
landing_dripback2_t *db2 = LAND_SPEC(land, dripback2);
bool via_access = (DESC_STREAM(desc) == darg->selfref);
assert(via_access || DESC_STREAM(desc) == darg->dripback);
while (rec) {
switch (REC_DESCR( rec)) {
case REC_data:
/* Test if record should go to the instance. */
if (SNetFeedbackMatch( rec, darg->back_patterns, darg->guards)) {
if (via_access) {
/* Because record came from outside add a detref counter. */
assert(db2->detfifo.head->next == NULL);
SNetRecDetrefAdd(rec, ++(db2->entered), land, &db2->detfifo);
} else {
/* Record came from the instance. */
assert(DATA_REC(rec, detref));
}
if (db2->instdesc == NULL) {
/* Instance should come back to this landing. */
if (SNetTopLanding(desc) != land) {
SNetPushLanding(desc, land);
}
db2->instdesc = SNetStreamOpen(darg->instance, desc);
if (SNetTopLanding(desc) == land) {
SNetPopLanding(desc);
SNetLandingDone(land);
}
}
SNetWrite(&db2->instdesc, rec, false);
} else {
if (!via_access) {
/* Record leaves the dripback loop. */
assert(DATA_REC(rec, detref));
SNetFeedbackLeave(rec, land, &db2->detfifo);
}
if (db2->outdesc == NULL) {
db2->outdesc = SNetStreamOpen(darg->output, desc);
}
SNetWrite(&db2->outdesc, rec, false);
}
break;
case REC_wakeup:
assert(via_access);
SNetRecDestroy(rec);
break;
case REC_terminate:
assert(via_access);
assert(db2->terminate == DripBackInitial);
db2->terminate = DripBackDraining;
SNetRecDestroy(rec);
break;
case REC_detref:
if (DETREF_REC( rec, leave) == land &&
DETREF_REC( rec, location) == SNetDistribGetNodeId())
{
assert(!via_access);
SNetDetLeaveCheckDetref(rec, &db2->detfifo);
if (DETREF_REC( rec, detref) == SNetFifoPeekFirst(&db2->detfifo)) {
DripBackCheckBusy(db2);
}
SNetRecDestroy(rec);
} else {
assert(via_access);
if (db2->outdesc == NULL) {
db2->outdesc = SNetStreamOpen(darg->output, desc);
}
SNetWrite(&db2->outdesc, rec, false);
}
break;
case REC_sync:
SNetRecDestroy(rec);
break;
default:
SNetRecUnknownEnt(__func__, rec, darg->entity);
}
rec = NULL;
if (db2->state == DripBackBusy) {
if (DripBackCheckBusy(db2) == false) {
assert(db2->queued > 0);
if (SAF(&db2->queued, 1) == 0) {
db2->state = DripBackIdle;
} else {
rec = SNetFifoGet(&db2->recfifo);
assert(rec);
via_access = true;
}
}
} else {
assert(db2->state == DripBackIdle);
assert(SNetFifoPeekFirst(&db2->detfifo) == NULL);
if (db2->queued > 0) {
rec = SNetFifoGet(&db2->recfifo);
assert(rec);
via_access = true;
db2->state = DripBackBusy;
}
}
}
if (db2->terminate == DripBackDraining) {
if (db2->state == DripBackIdle) {
assert(db2->queued == 0 && DripBackCheckBusy(db2) == false);
db2->terminate = DripBackTerminated;
}
}
if (db2->terminate == DripBackTerminated) {
if (db2->instdesc) {
snet_stream_desc_t *desc = db2->instdesc;
db2->instdesc = NULL;
SNetDescDone(desc);
SNetLandingDone(land);
}
}
}
else {
assert(0);
}
}
