1 | // -*- C++ -*- |
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2 | |
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3 | /* |
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4 | |
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5 | Heap Layers: An Extensible Memory Allocation Infrastructure |
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6 | |
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7 | Copyright (c) 1998-2006 Emery Berger, The University of Texas at Austin |
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8 | http://www.cs.umass.edu/~emery |
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9 | emery@cs.umass.edu |
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10 | |
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11 | This program is free software; you can redistribute it and/or modify |
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12 | it under the terms of the GNU General Public License as published by |
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13 | the Free Software Foundation; either version 2 of the License, or |
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14 | (at your option) any later version. |
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15 | |
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16 | This program is distributed in the hope that it will be useful, |
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17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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19 | GNU General Public License for more details. |
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20 | |
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21 | You should have received a copy of the GNU General Public License |
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22 | along with this program; if not, write to the Free Software |
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23 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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24 | |
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25 | */ |
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26 | |
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27 | #ifndef _HOARD_H_ |
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28 | #define _HOARD_H_ |
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29 | |
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30 | #include "hldefines.h" |
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31 | |
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32 | // The minimum allocation grain for a given object - |
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33 | // that is, we carve objects out of chunks of this size. |
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34 | #define SUPERBLOCK_SIZE 65536 |
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35 | |
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36 | // The number of 'emptiness classes'; see the ASPLOS paper for details. |
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37 | #define EMPTINESS_CLASSES 8 |
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38 | |
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39 | |
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40 | // Hoard-specific Heap Layers |
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41 | |
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42 | #include "check.h" |
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43 | #include "fixedrequestheap.h" |
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44 | #include "hoardmanager.h" |
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45 | #include "addheaderheap.h" |
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46 | #include "threadpoolheap.h" |
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47 | #include "redirectfree.h" |
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48 | #include "ignoreinvalidfree.h" |
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49 | #include "conformantheap.h" |
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50 | #include "hoardsuperblock.h" |
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51 | #include "lockmallocheap.h" |
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52 | #include "alignedsuperblockheap.h" |
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53 | #include "alignedmmap.h" |
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54 | #include "globalheap.h" |
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55 | |
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56 | // Generic Heap Layers |
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57 | |
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58 | #include "ansiwrapper.h" |
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59 | #include "debugheap.h" |
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60 | #include "lockedheap.h" |
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61 | #include "winlock.h" |
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62 | #include "bins4k.h" |
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63 | #include "bins8k.h" |
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64 | #include "bins16k.h" |
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65 | #include "bins64k.h" |
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66 | #include "oneheap.h" |
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67 | #include "freelistheap.h" |
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68 | #include "threadheap.h" |
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69 | #include "hybridheap.h" |
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70 | #include "posixlock.h" |
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71 | #include "spinlock.h" |
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72 | |
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73 | |
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74 | #if defined(_WIN32) |
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75 | typedef HL::WinLockType TheLockType; |
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76 | #elif defined(__APPLE__) |
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77 | // Spin lock not working on Mac yet. |
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78 | typedef HL::PosixLockType TheLockType; |
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79 | #else |
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80 | typedef HL::SpinLockType TheLockType; |
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81 | #endif |
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82 | |
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83 | namespace Hoard { |
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84 | |
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85 | typedef GlobalHeap<SUPERBLOCK_SIZE, EMPTINESS_CLASSES, TheLockType> TheGlobalHeap; |
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86 | |
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87 | class hoardThresholdFunctionClass { |
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88 | public: |
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89 | inline static bool function (int u, int a, size_t objSize) { |
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90 | /* |
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91 | Returns 1 iff we've crossed the emptiness threshold: |
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92 | |
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93 | U < A - 2S && U < EMPTINESS_CLASSES-1/EMPTINESS_CLASSES * A |
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94 | |
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95 | */ |
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96 | bool r = ((EMPTINESS_CLASSES * u) < ((EMPTINESS_CLASSES-1) * a)) && ((u < a - (2 * SUPERBLOCK_SIZE) / (int) objSize)); |
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97 | return r; |
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98 | } |
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99 | }; |
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100 | |
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101 | |
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102 | class SmallHeap; |
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103 | |
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104 | typedef HoardSuperblock<TheLockType, SUPERBLOCK_SIZE, SmallHeap> SmallSuperblockType; |
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105 | |
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106 | // The heap that manages small objects. |
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107 | class SmallHeap : |
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108 | public ConformantHeap< |
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109 | HoardManager<AlignedSuperblockHeap<TheLockType, SUPERBLOCK_SIZE>, |
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110 | TheGlobalHeap, |
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111 | SmallSuperblockType, |
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112 | EMPTINESS_CLASSES, |
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113 | TheLockType, |
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114 | hoardThresholdFunctionClass, |
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115 | SmallHeap> > {}; |
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116 | |
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117 | class BigHeap; |
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118 | |
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119 | typedef HoardSuperblock<TheLockType, SUPERBLOCK_SIZE, BigHeap> BigSuperblockType; |
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120 | |
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121 | // The heap that manages large objects. |
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122 | class BigHeap : |
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123 | public ConformantHeap<HL::LockedHeap<TheLockType, |
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124 | AddHeaderHeap<BigSuperblockType, |
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125 | SUPERBLOCK_SIZE, |
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126 | AlignedMmap<SUPERBLOCK_SIZE> > > > |
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127 | {}; |
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128 | |
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129 | |
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130 | enum { BigObjectSize = |
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131 | HL::bins<SmallSuperblockType::Header, SUPERBLOCK_SIZE>::BIG_OBJECT }; |
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132 | |
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133 | class PerThreadHoardHeap : |
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134 | public RedirectFree<LockMallocHeap<SmallHeap>, |
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135 | SmallSuperblockType> {}; |
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136 | |
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137 | template <int N, int NH> |
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138 | class HoardHeap : |
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139 | public HL::ANSIWrapper< |
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140 | IgnoreInvalidFree< |
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141 | HL::HybridHeap<Hoard::BigObjectSize, |
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142 | ThreadPoolHeap<N, NH, Hoard::PerThreadHoardHeap>, |
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143 | Hoard::BigHeap> > > |
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144 | { |
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145 | public: |
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146 | |
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147 | enum { BIG_OBJECT = Hoard::BigObjectSize }; |
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148 | |
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149 | HL::sassert<sizeof(Hoard::BigSuperblockType::Header) |
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150 | == sizeof(Hoard::SmallSuperblockType::Header)> ensureSameSizeHeaders; |
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151 | }; |
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152 | |
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153 | }; |
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154 | |
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155 | |
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156 | #endif |
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