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comparison src/share/vm/gc_implementation/g1/heapRegionSet.cpp @ 2432:455328d90876

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7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end Summary: What the synopsis says. Reviewed-by: jwilhelm, iveresov, johnc
author tonyp
date Tue, 29 Mar 2011 22:36:16 -0400
parents 1216415d8e35
children 8aae2050e83e
comparison
equal deleted inserted replaced
2431:02f49b66361a 2432:455328d90876
259 259
260 void HeapRegionLinkedList::fill_in_ext_msg_extra(hrs_ext_msg* msg) { 260 void HeapRegionLinkedList::fill_in_ext_msg_extra(hrs_ext_msg* msg) {
261 msg->append(" hd: "PTR_FORMAT" tl: "PTR_FORMAT, head(), tail()); 261 msg->append(" hd: "PTR_FORMAT" tl: "PTR_FORMAT, head(), tail());
262 } 262 }
263 263
264 void HeapRegionLinkedList::add_as_head(HeapRegionLinkedList* from_list) {
265 hrs_assert_mt_safety_ok(this);
266 hrs_assert_mt_safety_ok(from_list);
267
268 verify_optional();
269 from_list->verify_optional();
270
271 if (from_list->is_empty()) return;
272
273 #ifdef ASSERT
274 HeapRegionLinkedListIterator iter(from_list);
275 while (iter.more_available()) {
276 HeapRegion* hr = iter.get_next();
277 // In set_containing_set() we check that we either set the value
278 // from NULL to non-NULL or vice versa to catch bugs. So, we have
279 // to NULL it first before setting it to the value.
280 hr->set_containing_set(NULL);
281 hr->set_containing_set(this);
282 }
283 #endif // ASSERT
284
285 if (_head != NULL) {
286 assert(length() > 0 && _tail != NULL, hrs_ext_msg(this, "invariant"));
287 from_list->_tail->set_next(_head);
288 } else {
289 assert(length() == 0 && _head == NULL, hrs_ext_msg(this, "invariant"));
290 _tail = from_list->_tail;
291 }
292 _head = from_list->_head;
293
294 _length += from_list->length();
295 _region_num += from_list->region_num();
296 _total_used_bytes += from_list->total_used_bytes();
297 from_list->clear();
298
299 verify_optional();
300 from_list->verify_optional();
301 }
302
264 void HeapRegionLinkedList::add_as_tail(HeapRegionLinkedList* from_list) { 303 void HeapRegionLinkedList::add_as_tail(HeapRegionLinkedList* from_list) {
265 hrs_assert_mt_safety_ok(this); 304 hrs_assert_mt_safety_ok(this);
266 hrs_assert_mt_safety_ok(from_list); 305 hrs_assert_mt_safety_ok(from_list);
267 306
268 verify_optional(); 307 verify_optional();