1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/memory/space.inline.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,70 @@
1.4 +/*
1.5 + * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_MEMORY_SPACE_INLINE_HPP
1.29 +#define SHARE_VM_MEMORY_SPACE_INLINE_HPP
1.30 +
1.31 +#include "gc_interface/collectedHeap.hpp"
1.32 +#include "memory/space.hpp"
1.33 +#include "memory/universe.hpp"
1.34 +#include "runtime/safepoint.hpp"
1.35 +
1.36 +inline HeapWord* Space::block_start(const void* p) {
1.37 + return block_start_const(p);
1.38 +}
1.39 +
1.40 +inline HeapWord* OffsetTableContigSpace::allocate(size_t size) {
1.41 + HeapWord* res = ContiguousSpace::allocate(size);
1.42 + if (res != NULL) {
1.43 + _offsets.alloc_block(res, size);
1.44 + }
1.45 + return res;
1.46 +}
1.47 +
1.48 +// Because of the requirement of keeping "_offsets" up to date with the
1.49 +// allocations, we sequentialize these with a lock. Therefore, best if
1.50 +// this is used for larger LAB allocations only.
1.51 +inline HeapWord* OffsetTableContigSpace::par_allocate(size_t size) {
1.52 + MutexLocker x(&_par_alloc_lock);
1.53 + // This ought to be just "allocate", because of the lock above, but that
1.54 + // ContiguousSpace::allocate asserts that either the allocating thread
1.55 + // holds the heap lock or it is the VM thread and we're at a safepoint.
1.56 + // The best I (dld) could figure was to put a field in ContiguousSpace
1.57 + // meaning "locking at safepoint taken care of", and set/reset that
1.58 + // here. But this will do for now, especially in light of the comment
1.59 + // above. Perhaps in the future some lock-free manner of keeping the
1.60 + // coordination.
1.61 + HeapWord* res = ContiguousSpace::par_allocate(size);
1.62 + if (res != NULL) {
1.63 + _offsets.alloc_block(res, size);
1.64 + }
1.65 + return res;
1.66 +}
1.67 +
1.68 +inline HeapWord*
1.69 +OffsetTableContigSpace::block_start_const(const void* p) const {
1.70 + return _offsets.block_start(p);
1.71 +}
1.72 +
1.73 +#endif // SHARE_VM_MEMORY_SPACE_INLINE_HPP
