1/*
2 * Copyright (c) 2011, 2019, 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_GC_G1_HEAPREGIONSET_INLINE_HPP
26#define SHARE_GC_G1_HEAPREGIONSET_INLINE_HPP
27
28#include "gc/g1/heapRegionSet.hpp"
29
30inline void HeapRegionSetBase::add(HeapRegion* hr) {
31 check_mt_safety();
32 assert_heap_region_set(hr->containing_set() == NULL, "should not already have a containing set");
33 assert_heap_region_set(hr->next() == NULL, "should not already be linked");
34 assert_heap_region_set(hr->prev() == NULL, "should not already be linked");
35
36 _length++;
37 hr->set_containing_set(this);
38 verify_region(hr);
39}
40
41inline void HeapRegionSetBase::remove(HeapRegion* hr) {
42 check_mt_safety();
43 verify_region(hr);
44 assert_heap_region_set(hr->next() == NULL, "should already be unlinked");
45 assert_heap_region_set(hr->prev() == NULL, "should already be unlinked");
46
47 hr->set_containing_set(NULL);
48 assert_heap_region_set(_length > 0, "pre-condition");
49 _length--;
50}
51
52inline void FreeRegionList::add_ordered(HeapRegion* hr) {
53 assert_free_region_list((length() == 0 && _head == NULL && _tail == NULL && _last == NULL) ||
54 (length() > 0 && _head != NULL && _tail != NULL),
55 "invariant");
56 // add() will verify the region and check mt safety.
57 add(hr);
58
59 // Now link the region
60 if (_head != NULL) {
61 HeapRegion* curr;
62
63 if (_last != NULL && _last->hrm_index() < hr->hrm_index()) {
64 curr = _last;
65 } else {
66 curr = _head;
67 }
68
69 // Find first entry with a Region Index larger than entry to insert.
70 while (curr != NULL && curr->hrm_index() < hr->hrm_index()) {
71 curr = curr->next();
72 }
73
74 hr->set_next(curr);
75
76 if (curr == NULL) {
77 // Adding at the end
78 hr->set_prev(_tail);
79 _tail->set_next(hr);
80 _tail = hr;
81 } else if (curr->prev() == NULL) {
82 // Adding at the beginning
83 hr->set_prev(NULL);
84 _head = hr;
85 curr->set_prev(hr);
86 } else {
87 hr->set_prev(curr->prev());
88 hr->prev()->set_next(hr);
89 curr->set_prev(hr);
90 }
91 } else {
92 // The list was empty
93 _tail = hr;
94 _head = hr;
95 }
96 _last = hr;
97}
98
99inline HeapRegion* FreeRegionList::remove_from_head_impl() {
100 HeapRegion* result = _head;
101 _head = result->next();
102 if (_head == NULL) {
103 _tail = NULL;
104 } else {
105 _head->set_prev(NULL);
106 }
107 result->set_next(NULL);
108 return result;
109}
110
111inline HeapRegion* FreeRegionList::remove_from_tail_impl() {
112 HeapRegion* result = _tail;
113
114 _tail = result->prev();
115 if (_tail == NULL) {
116 _head = NULL;
117 } else {
118 _tail->set_next(NULL);
119 }
120 result->set_prev(NULL);
121 return result;
122}
123
124inline HeapRegion* FreeRegionList::remove_region(bool from_head) {
125 check_mt_safety();
126 verify_optional();
127
128 if (is_empty()) {
129 return NULL;
130 }
131 assert_free_region_list(length() > 0 && _head != NULL && _tail != NULL, "invariant");
132
133 HeapRegion* hr;
134
135 if (from_head) {
136 hr = remove_from_head_impl();
137 } else {
138 hr = remove_from_tail_impl();
139 }
140
141 if (_last == hr) {
142 _last = NULL;
143 }
144
145 // remove() will verify the region and check mt safety.
146 remove(hr);
147 return hr;
148}
149
150#endif // SHARE_GC_G1_HEAPREGIONSET_INLINE_HPP
151