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1 | /* -*- C++ -*- */ |
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2 | |
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3 | #ifndef _PADHEAP_H_ |
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4 | #define _PADHEAP_H_ |
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5 | |
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6 | #include <assert.h> |
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7 | |
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8 | // Pad object size requests. |
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9 | |
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10 | template <int CacheLineSize, class SuperHeap> |
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11 | class PadHeap : public SuperHeap { |
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12 | public: |
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13 | |
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14 | inline void * malloc (size_t sz) { |
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15 | return SuperHeap::malloc (roundup(sz)); |
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16 | } |
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17 | |
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18 | private: |
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19 | |
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20 | inline size_t roundup (size_t sz) { |
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21 | // NB: CacheLineSize MUST be a power of two. |
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22 | // The assertion below checks this. |
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23 | assert ((CacheLineSize & (CacheLineSize-1)) == 0); |
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24 | size_t roundup = (sz + CacheLineSize - 1) & ~((int) CacheLineSize-1); |
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25 | assert (roundup >= sz); |
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26 | return roundup; |
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27 | } |
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28 | }; |
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29 | |
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30 | #endif |
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