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1 | /* -*- C++ -*- */ |
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2 | |
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3 | #ifndef _HYBRIDHEAP_H_ |
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4 | #define _HYBRIDHEAP_H_ |
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5 | |
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6 | #include <assert.h> |
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7 | #include "sassert.h" |
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8 | #include "hldefines.h" |
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9 | |
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10 | /** |
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11 | * @class HybridHeap |
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12 | * Objects no bigger than BigSize are allocated and freed to SmallHeap. |
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13 | * Bigger objects are passed on to the super heap. |
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14 | */ |
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15 | |
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16 | namespace HL { |
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17 | |
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18 | template <int BigSize, class SmallHeap, class BigHeap> |
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19 | class HybridHeap : public SmallHeap { |
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20 | public: |
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21 | |
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22 | HybridHeap (void) |
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23 | { |
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24 | } |
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25 | |
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26 | enum { Alignment = ((int) SmallHeap::Alignment < (int) BigHeap::Alignment) ? |
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27 | (int) SmallHeap::Alignment : |
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28 | (int) BigHeap::Alignment }; |
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29 | |
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30 | MALLOC_FUNCTION INLINE void * malloc (size_t sz) { |
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31 | if (sz <= BigSize) { |
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32 | return SmallHeap::malloc (sz); |
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33 | } else { |
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34 | return slowPath (sz); |
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35 | } |
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36 | } |
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37 | |
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38 | inline void free (void * ptr) { |
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39 | if (SmallHeap::getSize(ptr) <= BigSize) { |
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40 | SmallHeap::free (ptr); |
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41 | } else { |
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42 | bm.free (ptr); |
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43 | } |
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44 | } |
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45 | |
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46 | inline void clear (void) { |
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47 | bm.clear(); |
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48 | SmallHeap::clear(); |
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49 | } |
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50 | |
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51 | |
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52 | private: |
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53 | |
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54 | MALLOC_FUNCTION NO_INLINE |
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55 | void * slowPath (size_t sz) { |
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56 | return bm.malloc (sz); |
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57 | } |
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58 | |
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59 | |
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60 | HL::sassert<(BigSize > 0)> checkBigSizeNonZero; |
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61 | |
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62 | BigHeap bm; |
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63 | }; |
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64 | |
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65 | } |
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66 | |
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67 | #endif |
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