ysr@777: /*
xdono@1279:  * Copyright 2001-2009 Sun Microsystems, Inc.  All Rights Reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
ysr@777:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
ysr@777:  * CA 95054 USA or visit www.sun.com if you need additional information or
ysr@777:  * have any questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
ysr@777: #include "incls/_precompiled.incl"
ysr@777: #include "incls/_sparsePRT.cpp.incl"
ysr@777: 
ysr@777: #define SPARSE_PRT_VERBOSE 0
ysr@777: 
iveresov@1696: #define UNROLL_CARD_LOOPS  1
ysr@777: 
ysr@777: void SparsePRT::init_iterator(SparsePRTIter* sprt_iter) {
ysr@777:     sprt_iter->init(this);
ysr@777: }
ysr@777: 
johnc@1242: void SparsePRTEntry::init(RegionIdx_t region_ind) {
ysr@777:   _region_ind = region_ind;
ysr@777:   _next_index = NullEntry;
iveresov@1696: 
ysr@777: #if UNROLL_CARD_LOOPS
iveresov@1696:   assert((cards_num() & (UnrollFactor - 1)) == 0, "Invalid number of cards in the entry");
iveresov@1696:   for (int i = 0; i < cards_num(); i += UnrollFactor) {
iveresov@1696:     _cards[i] = NullEntry;
iveresov@1696:     _cards[i + 1] = NullEntry;
iveresov@1696:     _cards[i + 2] = NullEntry;
iveresov@1696:     _cards[i + 3] = NullEntry;
iveresov@1696:   }
ysr@777: #else
iveresov@1696:   for (int i = 0; i < cards_num(); i++)
johnc@1242:     _cards[i] = NullEntry;
ysr@777: #endif
ysr@777: }
ysr@777: 
johnc@1242: bool SparsePRTEntry::contains_card(CardIdx_t card_index) const {
ysr@777: #if UNROLL_CARD_LOOPS
iveresov@1696:   assert((cards_num() & (UnrollFactor - 1)) == 0, "Invalid number of cards in the entry");
iveresov@1696:   for (int i = 0; i < cards_num(); i += UnrollFactor) {
iveresov@1696:     if (_cards[i] == card_index ||
iveresov@1696:         _cards[i + 1] == card_index ||
iveresov@1696:         _cards[i + 2] == card_index ||
iveresov@1696:         _cards[i + 3] == card_index) return true;
iveresov@1696:   }
ysr@777: #else
iveresov@1696:   for (int i = 0; i < cards_num(); i++) {
ysr@777:     if (_cards[i] == card_index) return true;
ysr@777:   }
ysr@777: #endif
ysr@777:   // Otherwise, we're full.
ysr@777:   return false;
ysr@777: }
ysr@777: 
ysr@777: int SparsePRTEntry::num_valid_cards() const {
ysr@777:   int sum = 0;
ysr@777: #if UNROLL_CARD_LOOPS
iveresov@1696:   assert((cards_num() & (UnrollFactor - 1)) == 0, "Invalid number of cards in the entry");
iveresov@1696:   for (int i = 0; i < cards_num(); i += UnrollFactor) {
iveresov@1696:     sum += (_cards[i] != NullEntry);
iveresov@1696:     sum += (_cards[i + 1] != NullEntry);
iveresov@1696:     sum += (_cards[i + 2] != NullEntry);
iveresov@1696:     sum += (_cards[i + 3] != NullEntry);
iveresov@1696:   }
ysr@777: #else
iveresov@1696:   for (int i = 0; i < cards_num(); i++) {
iveresov@1696:     sum += (_cards[i] != NullEntry);
ysr@777:   }
ysr@777: #endif
ysr@777:   // Otherwise, we're full.
ysr@777:   return sum;
ysr@777: }
ysr@777: 
johnc@1242: SparsePRTEntry::AddCardResult SparsePRTEntry::add_card(CardIdx_t card_index) {
ysr@777: #if UNROLL_CARD_LOOPS
iveresov@1696:   assert((cards_num() & (UnrollFactor - 1)) == 0, "Invalid number of cards in the entry");
iveresov@1696:   CardIdx_t c;
iveresov@1696:   for (int i = 0; i < cards_num(); i += UnrollFactor) {
iveresov@1696:     c = _cards[i];
iveresov@1696:     if (c == card_index) return found;
iveresov@1696:     if (c == NullEntry) { _cards[i] = card_index; return added; }
iveresov@1696:     c = _cards[i + 1];
iveresov@1696:     if (c == card_index) return found;
iveresov@1696:     if (c == NullEntry) { _cards[i + 1] = card_index; return added; }
iveresov@1696:     c = _cards[i + 2];
iveresov@1696:     if (c == card_index) return found;
iveresov@1696:     if (c == NullEntry) { _cards[i + 2] = card_index; return added; }
iveresov@1696:     c = _cards[i + 3];
iveresov@1696:     if (c == card_index) return found;
iveresov@1696:     if (c == NullEntry) { _cards[i + 3] = card_index; return added; }
iveresov@1696:   }
ysr@777: #else
iveresov@1696:   for (int i = 0; i < cards_num(); i++) {
johnc@1242:     CardIdx_t c = _cards[i];
ysr@777:     if (c == card_index) return found;
iveresov@1696:     if (c == NullEntry) { _cards[i] = card_index; return added; }
ysr@777:   }
ysr@777: #endif
ysr@777:   // Otherwise, we're full.
ysr@777:   return overflow;
ysr@777: }
ysr@777: 
johnc@1242: void SparsePRTEntry::copy_cards(CardIdx_t* cards) const {
ysr@777: #if UNROLL_CARD_LOOPS
iveresov@1696:   assert((cards_num() & (UnrollFactor - 1)) == 0, "Invalid number of cards in the entry");
iveresov@1696:   for (int i = 0; i < cards_num(); i += UnrollFactor) {
iveresov@1696:     cards[i] = _cards[i];
iveresov@1696:     cards[i + 1] = _cards[i + 1];
iveresov@1696:     cards[i + 2] = _cards[i + 2];
iveresov@1696:     cards[i + 3] = _cards[i + 3];
iveresov@1696:   }
ysr@777: #else
iveresov@1696:   for (int i = 0; i < cards_num(); i++) {
ysr@777:     cards[i] = _cards[i];
ysr@777:   }
ysr@777: #endif
ysr@777: }
ysr@777: 
ysr@777: void SparsePRTEntry::copy_cards(SparsePRTEntry* e) const {
ysr@777:   copy_cards(&e->_cards[0]);
ysr@777: }
ysr@777: 
ysr@777: // ----------------------------------------------------------------------
ysr@777: 
ysr@777: RSHashTable::RSHashTable(size_t capacity) :
ysr@777:   _capacity(capacity), _capacity_mask(capacity-1),
ysr@777:   _occupied_entries(0), _occupied_cards(0),
iveresov@1696:   _entries((SparsePRTEntry*)NEW_C_HEAP_ARRAY(char, SparsePRTEntry::size() * capacity)),
johnc@1242:   _buckets(NEW_C_HEAP_ARRAY(int, capacity)),
ysr@777:   _free_list(NullEntry), _free_region(0)
ysr@777: {
ysr@777:   clear();
ysr@777: }
ysr@777: 
ysr@777: RSHashTable::~RSHashTable() {
ysr@777:   if (_entries != NULL) {
ysr@777:     FREE_C_HEAP_ARRAY(SparsePRTEntry, _entries);
ysr@777:     _entries = NULL;
ysr@777:   }
ysr@777:   if (_buckets != NULL) {
johnc@1242:     FREE_C_HEAP_ARRAY(int, _buckets);
ysr@777:     _buckets = NULL;
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: void RSHashTable::clear() {
ysr@777:   _occupied_entries = 0;
ysr@777:   _occupied_cards = 0;
ysr@777:   guarantee(_entries != NULL, "INV");
ysr@777:   guarantee(_buckets != NULL, "INV");
johnc@1242: 
johnc@1242:   guarantee(_capacity <= ((size_t)1 << (sizeof(int)*BitsPerByte-1)) - 1,
johnc@1242:                 "_capacity too large");
johnc@1242: 
ysr@777:   // This will put -1 == NullEntry in the key field of all entries.
iveresov@1696:   memset(_entries, NullEntry, _capacity * SparsePRTEntry::size());
iveresov@1696:   memset(_buckets, NullEntry, _capacity * sizeof(int));
ysr@777:   _free_list = NullEntry;
ysr@777:   _free_region = 0;
ysr@777: }
ysr@777: 
johnc@1242: bool RSHashTable::add_card(RegionIdx_t region_ind, CardIdx_t card_index) {
ysr@777:   SparsePRTEntry* e = entry_for_region_ind_create(region_ind);
ysr@777:   assert(e != NULL && e->r_ind() == region_ind,
ysr@777:          "Postcondition of call above.");
ysr@777:   SparsePRTEntry::AddCardResult res = e->add_card(card_index);
ysr@777:   if (res == SparsePRTEntry::added) _occupied_cards++;
ysr@777: #if SPARSE_PRT_VERBOSE
ysr@777:   gclog_or_tty->print_cr("       after add_card[%d]: valid-cards = %d.",
iveresov@1696:                          pointer_delta(e, _entries, SparsePRTEntry::size()),
iveresov@1696:                          e->num_valid_cards());
ysr@777: #endif
ysr@777:   assert(e->num_valid_cards() > 0, "Postcondition");
ysr@777:   return res != SparsePRTEntry::overflow;
ysr@777: }
ysr@777: 
johnc@1242: bool RSHashTable::get_cards(RegionIdx_t region_ind, CardIdx_t* cards) {
johnc@1242:   int ind = (int) (region_ind & capacity_mask());
johnc@1242:   int cur_ind = _buckets[ind];
ysr@777:   SparsePRTEntry* cur;
ysr@777:   while (cur_ind != NullEntry &&
ysr@777:          (cur = entry(cur_ind))->r_ind() != region_ind) {
ysr@777:     cur_ind = cur->next_index();
ysr@777:   }
ysr@777: 
ysr@777:   if (cur_ind == NullEntry) return false;
ysr@777:   // Otherwise...
ysr@777:   assert(cur->r_ind() == region_ind, "Postcondition of loop + test above.");
ysr@777:   assert(cur->num_valid_cards() > 0, "Inv");
ysr@777:   cur->copy_cards(cards);
ysr@777:   return true;
ysr@777: }
ysr@777: 
iveresov@1696: SparsePRTEntry* RSHashTable::get_entry(RegionIdx_t region_ind) {
iveresov@1696:   int ind = (int) (region_ind & capacity_mask());
iveresov@1696:   int cur_ind = _buckets[ind];
iveresov@1696:   SparsePRTEntry* cur;
iveresov@1696:   while (cur_ind != NullEntry &&
iveresov@1696:          (cur = entry(cur_ind))->r_ind() != region_ind) {
iveresov@1696:     cur_ind = cur->next_index();
iveresov@1696:   }
iveresov@1696: 
iveresov@1696:   if (cur_ind == NullEntry) return NULL;
iveresov@1696:   // Otherwise...
iveresov@1696:   assert(cur->r_ind() == region_ind, "Postcondition of loop + test above.");
iveresov@1696:   assert(cur->num_valid_cards() > 0, "Inv");
iveresov@1696:   return cur;
iveresov@1696: }
iveresov@1696: 
johnc@1242: bool RSHashTable::delete_entry(RegionIdx_t region_ind) {
johnc@1242:   int ind = (int) (region_ind & capacity_mask());
johnc@1242:   int* prev_loc = &_buckets[ind];
johnc@1242:   int cur_ind = *prev_loc;
ysr@777:   SparsePRTEntry* cur;
ysr@777:   while (cur_ind != NullEntry &&
ysr@777:          (cur = entry(cur_ind))->r_ind() != region_ind) {
ysr@777:     prev_loc = cur->next_index_addr();
ysr@777:     cur_ind = *prev_loc;
ysr@777:   }
ysr@777: 
ysr@777:   if (cur_ind == NullEntry) return false;
ysr@777:   // Otherwise, splice out "cur".
ysr@777:   *prev_loc = cur->next_index();
ysr@777:   _occupied_cards -= cur->num_valid_cards();
ysr@777:   free_entry(cur_ind);
ysr@777:   _occupied_entries--;
ysr@777:   return true;
ysr@777: }
ysr@777: 
johnc@1242: SparsePRTEntry*
johnc@1242: RSHashTable::entry_for_region_ind(RegionIdx_t region_ind) const {
ysr@777:   assert(occupied_entries() < capacity(), "Precondition");
johnc@1242:   int ind = (int) (region_ind & capacity_mask());
johnc@1242:   int cur_ind = _buckets[ind];
ysr@777:   SparsePRTEntry* cur;
ysr@777:   while (cur_ind != NullEntry &&
ysr@777:          (cur = entry(cur_ind))->r_ind() != region_ind) {
ysr@777:     cur_ind = cur->next_index();
ysr@777:   }
ysr@777: 
ysr@777:   if (cur_ind != NullEntry) {
ysr@777:     assert(cur->r_ind() == region_ind, "Loop postcondition + test");
ysr@777:     return cur;
ysr@777:   } else {
ysr@777:     return NULL;
ysr@777:   }
ysr@777: }
ysr@777: 
johnc@1242: SparsePRTEntry*
johnc@1242: RSHashTable::entry_for_region_ind_create(RegionIdx_t region_ind) {
ysr@777:   SparsePRTEntry* res = entry_for_region_ind(region_ind);
ysr@777:   if (res == NULL) {
johnc@1242:     int new_ind = alloc_entry();
ysr@777:     assert(0 <= new_ind && (size_t)new_ind < capacity(), "There should be room.");
ysr@777:     res = entry(new_ind);
ysr@777:     res->init(region_ind);
ysr@777:     // Insert at front.
johnc@1242:     int ind = (int) (region_ind & capacity_mask());
ysr@777:     res->set_next_index(_buckets[ind]);
ysr@777:     _buckets[ind] = new_ind;
ysr@777:     _occupied_entries++;
ysr@777:   }
ysr@777:   return res;
ysr@777: }
ysr@777: 
johnc@1242: int RSHashTable::alloc_entry() {
johnc@1242:   int res;
ysr@777:   if (_free_list != NullEntry) {
ysr@777:     res = _free_list;
ysr@777:     _free_list = entry(res)->next_index();
ysr@777:     return res;
ysr@777:   } else if ((size_t) _free_region+1 < capacity()) {
ysr@777:     res = _free_region;
ysr@777:     _free_region++;
ysr@777:     return res;
ysr@777:   } else {
ysr@777:     return NullEntry;
ysr@777:   }
ysr@777: }
ysr@777: 
johnc@1242: void RSHashTable::free_entry(int fi) {
ysr@777:   entry(fi)->set_next_index(_free_list);
ysr@777:   _free_list = fi;
ysr@777: }
ysr@777: 
ysr@777: void RSHashTable::add_entry(SparsePRTEntry* e) {
ysr@777:   assert(e->num_valid_cards() > 0, "Precondition.");
ysr@777:   SparsePRTEntry* e2 = entry_for_region_ind_create(e->r_ind());
ysr@777:   e->copy_cards(e2);
ysr@777:   _occupied_cards += e2->num_valid_cards();
ysr@777:   assert(e2->num_valid_cards() > 0, "Postcondition.");
ysr@777: }
ysr@777: 
johnc@1242: CardIdx_t /* RSHashTable:: */ RSHashTableIter::find_first_card_in_list() {
johnc@1242:   CardIdx_t res;
ysr@777:   while (_bl_ind != RSHashTable::NullEntry) {
ysr@777:     res = _rsht->entry(_bl_ind)->card(0);
ysr@777:     if (res != SparsePRTEntry::NullEntry) {
ysr@777:       return res;
ysr@777:     } else {
ysr@777:       _bl_ind = _rsht->entry(_bl_ind)->next_index();
ysr@777:     }
ysr@777:   }
ysr@777:   // Otherwise, none found:
ysr@777:   return SparsePRTEntry::NullEntry;
ysr@777: }
ysr@777: 
johnc@1242: size_t /* RSHashTable:: */ RSHashTableIter::compute_card_ind(CardIdx_t ci) {
ysr@777:   return
ysr@777:     _heap_bot_card_ind
tonyp@1377:     + (_rsht->entry(_bl_ind)->r_ind() * HeapRegion::CardsPerRegion)
ysr@777:     + ci;
ysr@777: }
ysr@777: 
ysr@777: bool /* RSHashTable:: */ RSHashTableIter::has_next(size_t& card_index) {
ysr@777:   _card_ind++;
johnc@1242:   CardIdx_t ci;
iveresov@1696:   if (_card_ind < SparsePRTEntry::cards_num() &&
ysr@777:       ((ci = _rsht->entry(_bl_ind)->card(_card_ind)) !=
ysr@777:        SparsePRTEntry::NullEntry)) {
ysr@777:     card_index = compute_card_ind(ci);
ysr@777:     return true;
ysr@777:   }
ysr@777:   // Otherwise, must find the next valid entry.
ysr@777:   _card_ind = 0;
ysr@777: 
ysr@777:   if (_bl_ind != RSHashTable::NullEntry) {
ysr@777:       _bl_ind = _rsht->entry(_bl_ind)->next_index();
ysr@777:       ci = find_first_card_in_list();
ysr@777:       if (ci != SparsePRTEntry::NullEntry) {
ysr@777:         card_index = compute_card_ind(ci);
ysr@777:         return true;
ysr@777:       }
ysr@777:   }
ysr@777:   // If we didn't return above, must go to the next non-null table index.
ysr@777:   _tbl_ind++;
ysr@777:   while ((size_t)_tbl_ind < _rsht->capacity()) {
ysr@777:     _bl_ind = _rsht->_buckets[_tbl_ind];
ysr@777:     ci = find_first_card_in_list();
ysr@777:     if (ci != SparsePRTEntry::NullEntry) {
ysr@777:       card_index = compute_card_ind(ci);
ysr@777:       return true;
ysr@777:     }
ysr@777:     // Otherwise, try next entry.
ysr@777:     _tbl_ind++;
ysr@777:   }
ysr@777:   // Otherwise, there were no entry.
ysr@777:   return false;
ysr@777: }
ysr@777: 
johnc@1242: bool RSHashTable::contains_card(RegionIdx_t region_index, CardIdx_t card_index) const {
ysr@777:   SparsePRTEntry* e = entry_for_region_ind(region_index);
ysr@777:   return (e != NULL && e->contains_card(card_index));
ysr@777: }
ysr@777: 
ysr@777: size_t RSHashTable::mem_size() const {
johnc@1242:   return sizeof(this) +
iveresov@1696:     capacity() * (SparsePRTEntry::size() + sizeof(int));
ysr@777: }
ysr@777: 
ysr@777: // ----------------------------------------------------------------------
ysr@777: 
ysr@777: SparsePRT* SparsePRT::_head_expanded_list = NULL;
ysr@777: 
ysr@777: void SparsePRT::add_to_expanded_list(SparsePRT* sprt) {
ysr@777:   // We could expand multiple times in a pause -- only put on list once.
ysr@777:   if (sprt->expanded()) return;
ysr@777:   sprt->set_expanded(true);
ysr@777:   SparsePRT* hd = _head_expanded_list;
ysr@777:   while (true) {
ysr@777:     sprt->_next_expanded = hd;
ysr@777:     SparsePRT* res =
ysr@777:       (SparsePRT*)
ysr@777:       Atomic::cmpxchg_ptr(sprt, &_head_expanded_list, hd);
ysr@777:     if (res == hd) return;
ysr@777:     else hd = res;
ysr@777:   }
ysr@777: }
ysr@777: 
johnc@1242: 
ysr@777: SparsePRT* SparsePRT::get_from_expanded_list() {
ysr@777:   SparsePRT* hd = _head_expanded_list;
ysr@777:   while (hd != NULL) {
ysr@777:     SparsePRT* next = hd->next_expanded();
ysr@777:     SparsePRT* res =
ysr@777:       (SparsePRT*)
ysr@777:       Atomic::cmpxchg_ptr(next, &_head_expanded_list, hd);
ysr@777:     if (res == hd) {
ysr@777:       hd->set_next_expanded(NULL);
ysr@777:       return hd;
ysr@777:     } else {
ysr@777:       hd = res;
ysr@777:     }
ysr@777:   }
ysr@777:   return NULL;
ysr@777: }
ysr@777: 
ysr@777: 
ysr@777: void SparsePRT::cleanup_all() {
ysr@777:   // First clean up all expanded tables so they agree on next and cur.
ysr@777:   SparsePRT* sprt = get_from_expanded_list();
ysr@777:   while (sprt != NULL) {
ysr@777:     sprt->cleanup();
ysr@777:     sprt = get_from_expanded_list();
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: 
ysr@777: SparsePRT::SparsePRT(HeapRegion* hr) :
ysr@777:   _expanded(false), _next_expanded(NULL)
ysr@777: {
ysr@777:   _cur = new RSHashTable(InitialCapacity);
ysr@777:   _next = _cur;
ysr@777: }
ysr@777: 
johnc@1242: 
ysr@777: SparsePRT::~SparsePRT() {
ysr@777:   assert(_next != NULL && _cur != NULL, "Inv");
ysr@777:   if (_cur != _next) { delete _cur; }
ysr@777:   delete _next;
ysr@777: }
ysr@777: 
ysr@777: 
ysr@777: size_t SparsePRT::mem_size() const {
ysr@777:   // We ignore "_cur" here, because it either = _next, or else it is
ysr@777:   // on the deleted list.
ysr@777:   return sizeof(this) + _next->mem_size();
ysr@777: }
ysr@777: 
johnc@1242: bool SparsePRT::add_card(RegionIdx_t region_id, CardIdx_t card_index) {
ysr@777: #if SPARSE_PRT_VERBOSE
ysr@777:   gclog_or_tty->print_cr("  Adding card %d from region %d to region %d sparse.",
ysr@777:                 card_index, region_id, _hr->hrs_index());
ysr@777: #endif
ysr@777:   if (_next->occupied_entries() * 2 > _next->capacity()) {
ysr@777:     expand();
ysr@777:   }
ysr@777:   return _next->add_card(region_id, card_index);
ysr@777: }
ysr@777: 
johnc@1242: bool SparsePRT::get_cards(RegionIdx_t region_id, CardIdx_t* cards) {
ysr@777:   return _next->get_cards(region_id, cards);
ysr@777: }
ysr@777: 
iveresov@1696: SparsePRTEntry* SparsePRT::get_entry(RegionIdx_t region_id) {
iveresov@1696:   return _next->get_entry(region_id);
iveresov@1696: }
iveresov@1696: 
johnc@1242: bool SparsePRT::delete_entry(RegionIdx_t region_id) {
ysr@777:   return _next->delete_entry(region_id);
ysr@777: }
ysr@777: 
ysr@777: void SparsePRT::clear() {
ysr@777:   // If they differ, _next is bigger then cur, so next has no chance of
ysr@777:   // being the initial size.
ysr@777:   if (_next != _cur) {
ysr@777:     delete _next;
ysr@777:   }
ysr@777: 
ysr@777:   if (_cur->capacity() != InitialCapacity) {
ysr@777:     delete _cur;
ysr@777:     _cur = new RSHashTable(InitialCapacity);
ysr@777:   } else {
ysr@777:     _cur->clear();
ysr@777:   }
ysr@777:   _next = _cur;
ysr@777: }
ysr@777: 
ysr@777: void SparsePRT::cleanup() {
apetrusenko@1480:   // Make sure that the current and next tables agree.
apetrusenko@1480:   if (_cur != _next) {
apetrusenko@1480:     delete _cur;
apetrusenko@1480:   }
ysr@777:   _cur = _next;
tonyp@1052:   set_expanded(false);
ysr@777: }
ysr@777: 
ysr@777: void SparsePRT::expand() {
ysr@777:   RSHashTable* last = _next;
ysr@777:   _next = new RSHashTable(last->capacity() * 2);
ysr@777: 
ysr@777: #if SPARSE_PRT_VERBOSE
ysr@777:   gclog_or_tty->print_cr("  Expanded sparse table for %d to %d.",
ysr@777:                 _hr->hrs_index(), _next->capacity());
ysr@777: #endif
ysr@777:   for (size_t i = 0; i < last->capacity(); i++) {
ysr@777:     SparsePRTEntry* e = last->entry((int)i);
ysr@777:     if (e->valid_entry()) {
ysr@777: #if SPARSE_PRT_VERBOSE
ysr@777:       gclog_or_tty->print_cr("    During expansion, transferred entry for %d.",
ysr@777:                     e->r_ind());
ysr@777: #endif
ysr@777:       _next->add_entry(e);
ysr@777:     }
ysr@777:   }
apetrusenko@1480:   if (last != _cur) {
apetrusenko@1480:     delete last;
apetrusenko@1480:   }
ysr@777:   add_to_expanded_list(this);
ysr@777: }