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1 /*
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2 * copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSET_INLINE_HPP
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26 #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSET_INLINE_HPP
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27
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28 #include "gc_implementation/g1/heapRegionSet.hpp"
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29
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30 //////////////////// HeapRegionSetBase ////////////////////
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31
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32 inline void HeapRegionSetBase::update_for_addition(HeapRegion* hr) {
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33 // Assumes the caller has already verified the region.
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34
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35 _length += 1;
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36 if (!hr->isHumongous()) {
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37 _region_num += 1;
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38 } else {
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39 _region_num += calculate_region_num(hr);
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40 }
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41 _total_used_bytes += hr->used();
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42 }
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43
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44 inline void HeapRegionSetBase::add_internal(HeapRegion* hr) {
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45 hrs_assert_region_ok(this, hr, NULL);
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46 assert(hr->next() == NULL, hrs_ext_msg(this, "should not already be linked"));
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47
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48 update_for_addition(hr);
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49 hr->set_containing_set(this);
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50 }
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51
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52 inline void HeapRegionSetBase::update_for_removal(HeapRegion* hr) {
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53 // Assumes the caller has already verified the region.
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54 assert(_length > 0, hrs_ext_msg(this, "pre-condition"));
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55 _length -= 1;
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56
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57 size_t region_num_diff;
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58 if (!hr->isHumongous()) {
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59 region_num_diff = 1;
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60 } else {
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61 region_num_diff = calculate_region_num(hr);
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62 }
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63 assert(region_num_diff <= _region_num,
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64 hrs_err_msg("[%s] region's region num: "SIZE_FORMAT" "
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65 "should be <= region num: "SIZE_FORMAT,
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66 name(), region_num_diff, _region_num));
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67 _region_num -= region_num_diff;
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68
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69 size_t used_bytes = hr->used();
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70 assert(used_bytes <= _total_used_bytes,
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71 hrs_err_msg("[%s] region's used bytes: "SIZE_FORMAT" "
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72 "should be <= used bytes: "SIZE_FORMAT,
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73 name(), used_bytes, _total_used_bytes));
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74 _total_used_bytes -= used_bytes;
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75 }
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76
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77 inline void HeapRegionSetBase::remove_internal(HeapRegion* hr) {
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78 hrs_assert_region_ok(this, hr, this);
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79 assert(hr->next() == NULL, hrs_ext_msg(this, "should already be unlinked"));
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80
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81 hr->set_containing_set(NULL);
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82 update_for_removal(hr);
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83 }
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84
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85 //////////////////// HeapRegionSet ////////////////////
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86
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87 inline void HeapRegionSet::add(HeapRegion* hr) {
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88 hrs_assert_mt_safety_ok(this);
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89 // add_internal() will verify the region.
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90 add_internal(hr);
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91 }
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92
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93 inline void HeapRegionSet::remove(HeapRegion* hr) {
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94 hrs_assert_mt_safety_ok(this);
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95 // remove_internal() will verify the region.
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96 remove_internal(hr);
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97 }
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98
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99 inline void HeapRegionSet::remove_with_proxy(HeapRegion* hr,
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100 HeapRegionSet* proxy_set) {
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101 // No need to fo the MT safety check here given that this method
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102 // does not update the contents of the set but instead accumulates
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103 // the changes in proxy_set which is assumed to be thread-local.
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104 hrs_assert_sets_match(this, proxy_set);
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105 hrs_assert_region_ok(this, hr, this);
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106
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107 hr->set_containing_set(NULL);
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108 proxy_set->update_for_addition(hr);
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109 }
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110
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111 //////////////////// HeapRegionLinkedList ////////////////////
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112
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113 inline void HeapRegionLinkedList::add_as_tail(HeapRegion* hr) {
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114 hrs_assert_mt_safety_ok(this);
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115 assert((length() == 0 && _head == NULL && _tail == NULL) ||
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116 (length() > 0 && _head != NULL && _tail != NULL),
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117 hrs_ext_msg(this, "invariant"));
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118 // add_internal() will verify the region.
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119 add_internal(hr);
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120
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121 // Now link the region.
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122 if (_tail != NULL) {
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123 _tail->set_next(hr);
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124 } else {
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125 _head = hr;
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126 }
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127 _tail = hr;
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128 }
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129
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130 inline HeapRegion* HeapRegionLinkedList::remove_head() {
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131 hrs_assert_mt_safety_ok(this);
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132 assert(!is_empty(), hrs_ext_msg(this, "the list should not be empty"));
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133 assert(length() > 0 && _head != NULL && _tail != NULL,
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134 hrs_ext_msg(this, "invariant"));
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135
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136 // We need to unlink it first.
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137 HeapRegion* hr = _head;
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138 _head = hr->next();
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139 if (_head == NULL) {
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140 _tail = NULL;
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141 }
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142 hr->set_next(NULL);
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143
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144 // remove_internal() will verify the region.
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145 remove_internal(hr);
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146 return hr;
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147 }
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148
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149 inline HeapRegion* HeapRegionLinkedList::remove_head_or_null() {
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150 hrs_assert_mt_safety_ok(this);
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151
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152 if (!is_empty()) {
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153 return remove_head();
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154 } else {
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155 return NULL;
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156 }
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157 }
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158
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159 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONSET_INLINE_HPP
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