1 /*
2 * Copyright (c) 2001, 2007, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) {
26 HeapWord* res = ContiguousSpace::allocate(size);
27 if (res != NULL) {
28 _offsets.alloc_block(res, size);
29 }
30 return res;
31 }
32
33 // Because of the requirement of keeping "_offsets" up to date with the
34 // allocations, we sequentialize these with a lock. Therefore, best if
35 // this is used for larger LAB allocations only.
36 inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) {
37 MutexLocker x(&_par_alloc_lock);
38 // This ought to be just "allocate", because of the lock above, but that
39 // ContiguousSpace::allocate asserts that either the allocating thread
40 // holds the heap lock or it is the VM thread and we're at a safepoint.
41 // The best I (dld) could figure was to put a field in ContiguousSpace
42 // meaning "locking at safepoint taken care of", and set/reset that
43 // here. But this will do for now, especially in light of the comment
44 // above. Perhaps in the future some lock-free manner of keeping the
45 // coordination.
46 HeapWord* res = ContiguousSpace::par_allocate(size);
47 if (res != NULL) {
48 _offsets.alloc_block(res, size);
49 }
50 return res;
51 }
52
53 inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) {
54 return _offsets.block_start(p);
55 }
56
57 inline HeapWord*
58 G1OffsetTableContigSpace::block_start_const(const void* p) const {
59 return _offsets.block_start_const(p);
60 }
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1 /*
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP
27
28 inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) {
29 HeapWord* res = ContiguousSpace::allocate(size);
30 if (res != NULL) {
31 _offsets.alloc_block(res, size);
32 }
33 return res;
34 }
35
36 // Because of the requirement of keeping "_offsets" up to date with the
37 // allocations, we sequentialize these with a lock. Therefore, best if
38 // this is used for larger LAB allocations only.
39 inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) {
40 MutexLocker x(&_par_alloc_lock);
41 // This ought to be just "allocate", because of the lock above, but that
42 // ContiguousSpace::allocate asserts that either the allocating thread
43 // holds the heap lock or it is the VM thread and we're at a safepoint.
44 // The best I (dld) could figure was to put a field in ContiguousSpace
45 // meaning "locking at safepoint taken care of", and set/reset that
46 // here. But this will do for now, especially in light of the comment
47 // above. Perhaps in the future some lock-free manner of keeping the
48 // coordination.
49 HeapWord* res = ContiguousSpace::par_allocate(size);
50 if (res != NULL) {
51 _offsets.alloc_block(res, size);
52 }
53 return res;
54 }
55
56 inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) {
57 return _offsets.block_start(p);
58 }
59
60 inline HeapWord*
61 G1OffsetTableContigSpace::block_start_const(const void* p) const {
62 return _offsets.block_start_const(p);
63 }
64
65 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP
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