void CqsDequeue(Queue q, void **resp)
{
#ifdef ADAPT_SCHED_MEM
/* Added by Isaac for testing purposes: */
if((q->length > 1) && (CmiMemoryUsage() > schedAdaptMemThresholdMB*1024*1024) ){
/* CqsIncreasePriorityForEntryMethod(q, 153); */
CqsIncreasePriorityForMemCriticalEntries(q);
}
#endif
if (q->length==0)
{ *resp = 0; return; }
if (q->negprioq.heapnext>1)
{ *resp = CqsPrioqDequeue(&(q->negprioq)); q->length--; return; }
if (q->zeroprio.head != q->zeroprio.tail)
{ *resp = CqsDeqDequeue(&(q->zeroprio)); q->length--; return; }
if (q->posprioq.heapnext>1)
{ *resp = CqsPrioqDequeue(&(q->posprioq)); q->length--; return; }
*resp = 0; return;
}
/** Dequeue an entry */
void *CqsPrioqDequeue(_prioq pq)
{
_prio pri;
_prioqelt pe, old;
void *data;
int heappos, heapnext;
_prioqelt *heap = pq->heap;
int left_child;
_prioqelt temp1_ht_right, temp1_ht_left, temp1_ht_parent;
_prioqelt *temp1_ht_handle;
static int cnt_nilesh1=0;
#ifdef FASTQ
/* printf("Hi I'm here too!! %d\n",cnt_nilesh1++); */
#endif
if (pq->heapnext==1) return 0;
pe = heap[1];
data = CqsDeqDequeue(&(pe->data));
if (pe->data.head == pe->data.tail) {
/* Unlink prio-bucket from hash-table */
#ifndef FASTQ
_prioqelt next = pe->ht_next;
_prioqelt *handle = pe->ht_handle;
if (next) next->ht_handle = handle;
*handle = next;
old=pe;
#else
old=pe;
prioqelt *handle;
if(pe->ht_parent)
{
if(pe->ht_parent->ht_left==pe) left_child=1;
else left_child=0;
}
else
{ /* it is the root in the hashtable entry, so its ht_handle should be used by whoever is the new root */
handle = pe->ht_handle;
}
if(!pe->ht_left && !pe->ht_right)
{
if(pe->ht_parent) {
if(left_child) pe->ht_parent->ht_left=NULL;
else pe->ht_parent->ht_right=NULL;
}
else {
*handle = NULL;
}
}
else if(!pe->ht_right)
{
/*if the node does not have a right subtree, its left subtree root is the new child of its parent */
pe->ht_left->ht_parent=pe->ht_parent;
if(pe->ht_parent)
{
if(left_child) {
pe->ht_parent->ht_left = pe->ht_left;
pe->ht_left->ht_handle = &(pe->ht_parent->ht_left);
}
else {
pe->ht_parent->ht_right = pe->ht_left;
pe->ht_left->ht_handle = &(pe->ht_parent->ht_right);
}
}
else {
pe->ht_left->ht_handle = handle;
*handle = pe->ht_left;
}
}
else if(!pe->ht_left)
{
/*if the node does not have a left subtree, its right subtree root is the new child of its parent */
pe->ht_right->ht_parent=pe->ht_parent;
/*pe->ht_right->ht_left=pe->ht_left; */
if(pe->ht_parent)
{
if(left_child) {
pe->ht_parent->ht_left = pe->ht_right;
pe->ht_right->ht_handle = &(pe->ht_parent->ht_left);
}
else {
pe->ht_parent->ht_right = pe->ht_right;
pe->ht_right->ht_handle = &(pe->ht_parent->ht_right);
}
}
else {
pe->ht_right->ht_handle = handle;
*handle = pe->ht_right;
}
}
else if(!pe->ht_right->ht_left)
{
pe->ht_right->ht_parent=pe->ht_parent;
if(pe->ht_parent)
{
if(left_child) {
pe->ht_parent->ht_left = pe->ht_right;
pe->ht_right->ht_handle = &(pe->ht_parent->ht_left);
}
else {
pe->ht_parent->ht_right = pe->ht_right;
pe->ht_right->ht_handle = &(pe->ht_parent->ht_right);
}
}
else {
pe->ht_right->ht_handle = handle;
*handle = pe->ht_right;
}
if(pe->ht_left) {
pe->ht_right->ht_left = pe->ht_left;
pe->ht_left->ht_parent = pe->ht_right;
pe->ht_left->ht_handle = &(pe->ht_right->ht_left);
}
}
else
{
/*if it has both subtrees, swap it with its successor */
for(pe=pe->ht_right; pe; )
{
if(pe->ht_left) pe=pe->ht_left;
else /*found the sucessor */
{ /*take care of the connections */
if(old->ht_parent)
{
if(left_child) {
old->ht_parent->ht_left = pe;
pe->ht_handle = &(old->ht_parent->ht_left);
}
else {
old->ht_parent->ht_right = pe;
pe->ht_handle = &(old->ht_parent->ht_right);
}
}
else {
pe->ht_handle = handle;
*handle = pe;
}
temp1_ht_right = pe->ht_right;
temp1_ht_left = pe->ht_left;
temp1_ht_parent = pe->ht_parent;
temp1_ht_handle = pe->ht_handle;
pe->ht_parent = old->ht_parent;
pe->ht_left = old->ht_left;
pe->ht_right = old->ht_right;
if(pe->ht_left) {
pe->ht_left->ht_parent = pe;
pe->ht_right->ht_handle = &(pe->ht_right);
}
if(pe->ht_right) {
pe->ht_right->ht_parent = pe;
pe->ht_right->ht_handle = &(pe->ht_right);
}
temp1_ht_parent->ht_left = temp1_ht_right;
if(temp1_ht_right) {
temp1_ht_right->ht_handle = &(temp1_ht_parent->ht_left);
temp1_ht_right->ht_parent = temp1_ht_parent;
}
break;
}
}
}
#endif
pq->hash_entry_size--;
/* Restore the heap */
heapnext = (--pq->heapnext);
pe = heap[heapnext];
pri = &(pe->pri);
heappos = 1;
while (1) {
int childpos1, childpos2, childpos;
_prioqelt ch1, ch2, child;
childpos1 = heappos<<1;
if (childpos1>=heapnext) break;
childpos2 = childpos1+1;
if (childpos2>=heapnext)
{
childpos=childpos1;
child=heap[childpos1];
}
else {
ch1 = heap[childpos1];
ch2 = heap[childpos2];
if (CqsPrioGT(&(ch1->pri), &(ch2->pri)))
{
childpos=childpos2;
child=ch2;
}
else {
childpos=childpos1;
child=ch1;
}
}
if (CqsPrioGT(&(child->pri), pri)) break;
heap[heappos]=child;
heappos=childpos;
}
heap[heappos]=pe;
/* Free prio-bucket */
if (old->data.bgn != old->data.space) CmiFree(old->data.bgn);
CmiFree(old);
}
return data;
}
