61 lines
2.4 KiB
C++
61 lines
2.4 KiB
C++
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/*
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* Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) {
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HeapWord* res = ContiguousSpace::allocate(size);
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if (res != NULL) {
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_offsets.alloc_block(res, size);
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}
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return res;
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}
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// Because of the requirement of keeping "_offsets" up to date with the
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// allocations, we sequentialize these with a lock. Therefore, best if
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// this is used for larger LAB allocations only.
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inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) {
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MutexLocker x(&_par_alloc_lock);
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// This ought to be just "allocate", because of the lock above, but that
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// ContiguousSpace::allocate asserts that either the allocating thread
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// holds the heap lock or it is the VM thread and we're at a safepoint.
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// The best I (dld) could figure was to put a field in ContiguousSpace
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// meaning "locking at safepoint taken care of", and set/reset that
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// here. But this will do for now, especially in light of the comment
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// above. Perhaps in the future some lock-free manner of keeping the
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// coordination.
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HeapWord* res = ContiguousSpace::par_allocate(size);
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if (res != NULL) {
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_offsets.alloc_block(res, size);
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}
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return res;
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}
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inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) {
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return _offsets.block_start(p);
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}
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inline HeapWord*
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G1OffsetTableContigSpace::block_start_const(const void* p) const {
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return _offsets.block_start_const(p);
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}
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