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 | |
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29 | StaticHeap: manage a fixed range of memory. |
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30 | |
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31 | */ |
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32 | |
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33 | #ifndef _STATICHEAP_H_ |
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34 | #define _STATICHEAP_H_ |
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35 | |
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36 | namespace HL { |
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37 | |
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38 | template <int MemorySize> |
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39 | class StaticHeap { |
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40 | public: |
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41 | |
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42 | StaticHeap (void) |
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43 | : ptr (&buf[0]), |
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44 | remaining (MemorySize) |
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45 | {} |
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46 | |
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47 | enum { Alignment = 1 }; |
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48 | |
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49 | inline void * malloc (size_t sz) { |
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50 | if (remaining < sz) { |
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51 | return NULL; |
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52 | } |
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53 | void * p = ptr; |
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54 | ptr += sz; |
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55 | remaining -= sz; |
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56 | return p; |
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57 | } |
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58 | |
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59 | void free (void *) {} |
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60 | int remove (void *) { return 0; } |
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61 | |
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62 | int isValid (void * ptr) { |
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63 | return (((size_t) ptr >= (size_t) buf) && |
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64 | ((size_t) ptr < (size_t) buf)); |
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65 | } |
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66 | |
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67 | private: |
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68 | |
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69 | // Disable copying and assignment. |
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70 | StaticHeap (const StaticHeap& treap); |
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71 | StaticHeap& operator= (const StaticHeap& treap); |
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72 | |
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73 | char buf[MemorySize]; |
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74 | char * ptr; |
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75 | size_t remaining; |
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76 | }; |
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77 | |
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78 | }; |
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79 | |
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80 | #endif |
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