1 /*
2 * Copyright (c) 2003, 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_PARALLELSCAVENGE_ADJOININGVIRTUALSPACES_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ADJOININGVIRTUALSPACES_HPP
27
28 #include "gc_implementation/parallelScavenge/psVirtualspace.hpp"
29
30
31 // Contains two virtual spaces that each can individually span
32 // most of the reserved region but committed parts of which
33 // cannot overlap.
34 //
35 // +-------+ <--- high_boundary for H
36 // | |
37 // | H |
38 // | |
39 // | |
40 // | |
41 // --------- <--- low for H
42 // | |
43 // ========= <--- low_boundary for H, high_boundary for L
44 // | |
45 // | |
46 // | |
47 // --------- <--- high for L
48 // | |
95 bool adjust_boundary_up(size_t size_in_bytes);
96 // and down
97 bool adjust_boundary_down(size_t size_in_bytes);
98
99 // Maximum byte size for the high space.
100 size_t high_byte_size_limit() {
101 return _reserved_space.size() - _min_low_byte_size;
102 }
103 // Maximum byte size for the low space.
104 size_t low_byte_size_limit() {
105 return _reserved_space.size() - _min_high_byte_size;
106 }
107
108 // Sets the boundaries for the virtual spaces and commits and
109 // initial size;
110 void initialize(size_t max_low_byte_size,
111 size_t init_low_byte_size,
112 size_t init_high_byte_size);
113 };
114
115 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ADJOININGVIRTUALSPACES_HPP
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1 /*
2 * Copyright (c) 2003, 2015, 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_PARALLEL_ADJOININGVIRTUALSPACES_HPP
26 #define SHARE_VM_GC_PARALLEL_ADJOININGVIRTUALSPACES_HPP
27
28 #include "gc/parallel/psVirtualspace.hpp"
29
30
31 // Contains two virtual spaces that each can individually span
32 // most of the reserved region but committed parts of which
33 // cannot overlap.
34 //
35 // +-------+ <--- high_boundary for H
36 // | |
37 // | H |
38 // | |
39 // | |
40 // | |
41 // --------- <--- low for H
42 // | |
43 // ========= <--- low_boundary for H, high_boundary for L
44 // | |
45 // | |
46 // | |
47 // --------- <--- high for L
48 // | |
95 bool adjust_boundary_up(size_t size_in_bytes);
96 // and down
97 bool adjust_boundary_down(size_t size_in_bytes);
98
99 // Maximum byte size for the high space.
100 size_t high_byte_size_limit() {
101 return _reserved_space.size() - _min_low_byte_size;
102 }
103 // Maximum byte size for the low space.
104 size_t low_byte_size_limit() {
105 return _reserved_space.size() - _min_high_byte_size;
106 }
107
108 // Sets the boundaries for the virtual spaces and commits and
109 // initial size;
110 void initialize(size_t max_low_byte_size,
111 size_t init_low_byte_size,
112 size_t init_high_byte_size);
113 };
114
115 #endif // SHARE_VM_GC_PARALLEL_ADJOININGVIRTUALSPACES_HPP
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