ysr@777: /*
ysr@777:  * Copyright 2001-2007 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: inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) {
ysr@777:   HeapWord* res = ContiguousSpace::allocate(size);
ysr@777:   if (res != NULL) {
ysr@777:     _offsets.alloc_block(res, size);
ysr@777:   }
ysr@777:   return res;
ysr@777: }
ysr@777: 
ysr@777: // Because of the requirement of keeping "_offsets" up to date with the
ysr@777: // allocations, we sequentialize these with a lock.  Therefore, best if
ysr@777: // this is used for larger LAB allocations only.
ysr@777: inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) {
ysr@777:   MutexLocker x(&_par_alloc_lock);
ysr@777:   // This ought to be just "allocate", because of the lock above, but that
ysr@777:   // ContiguousSpace::allocate asserts that either the allocating thread
ysr@777:   // holds the heap lock or it is the VM thread and we're at a safepoint.
ysr@777:   // The best I (dld) could figure was to put a field in ContiguousSpace
ysr@777:   // meaning "locking at safepoint taken care of", and set/reset that
ysr@777:   // here.  But this will do for now, especially in light of the comment
ysr@777:   // above.  Perhaps in the future some lock-free manner of keeping the
ysr@777:   // coordination.
ysr@777:   HeapWord* res = ContiguousSpace::par_allocate(size);
ysr@777:   if (res != NULL) {
ysr@777:     _offsets.alloc_block(res, size);
ysr@777:   }
ysr@777:   return res;
ysr@777: }
ysr@777: 
ysr@777: inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) {
ysr@777:   return _offsets.block_start(p);
ysr@777: }
ysr@777: 
ysr@777: inline HeapWord*
ysr@777: G1OffsetTableContigSpace::block_start_const(const void* p) const {
ysr@777:   return _offsets.block_start_const(p);
ysr@777: }