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) 2000-2003 by Emery Berger |
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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 | |
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28 | #ifndef _ADAPT_H_ |
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29 | #define _ADAPT_H_ |
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30 | |
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31 | /** |
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32 | * @class AdaptHeap |
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33 | * @brief Maintains dictionary entries through freed objects. |
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34 | * Sample dictionaries include DLList and SLList. |
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35 | */ |
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36 | |
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37 | namespace HL { |
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38 | |
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39 | template <class Dictionary, class SuperHeap> |
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40 | class AdaptHeap : public SuperHeap { |
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41 | public: |
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42 | |
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43 | /// Allocate an object (remove from the dictionary). |
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44 | inline void * malloc (const size_t) { |
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45 | void * ptr = (Entry *) dict.get(); |
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46 | return ptr; |
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47 | } |
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48 | |
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49 | /// Deallocate the object (return to the dictionary). |
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50 | inline void free (void * ptr) { |
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51 | Entry * entry = (Entry *) ptr; |
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52 | dict.insert (entry); |
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53 | } |
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54 | |
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55 | /// Remove an object from the dictionary. |
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56 | inline int remove (void * ptr) { |
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57 | dict.remove ((Entry *) ptr); |
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58 | return 1; |
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59 | } |
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60 | |
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61 | /// Clear the dictionary. |
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62 | inline void clear (void) { |
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63 | Entry * ptr; |
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64 | while ((ptr = (Entry *) dict.get()) != NULL) { |
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65 | SuperHeap::free (ptr); |
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66 | } |
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67 | dict.clear(); |
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68 | SuperHeap::clear(); |
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69 | } |
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70 | |
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71 | |
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72 | private: |
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73 | |
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74 | /// The dictionary object. |
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75 | Dictionary dict; |
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76 | |
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77 | class Entry : public Dictionary::Entry {}; |
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78 | }; |
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79 | |
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80 | } |
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81 | |
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82 | #endif // _ADAPT_H_ |
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