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1 | #ifndef _PERCLASSHEAP_H |
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2 | #define _PERCLASSHEAP_H |
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3 | |
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4 | #include <new> |
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5 | |
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6 | /** |
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7 | * @class PerClassHeap |
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8 | * @brief Enable the use of one heap for all class memory allocation. |
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9 | * |
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10 | * This class contains one instance of the SuperHeap argument. The |
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11 | * example below shows how to make a subclass of Foo that uses a |
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12 | * FreelistHeap to manage its memory, overloading operators new and |
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13 | * delete. |
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14 | * |
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15 | * <TT> |
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16 | * class NewFoo : public Foo, PerClassHeap<FreelistHeap<mallocHeap> > {}; |
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17 | * </TT> |
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18 | */ |
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19 | |
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20 | namespace HL { |
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21 | |
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22 | template <class SuperHeap> |
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23 | class PerClassHeap { |
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24 | public: |
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25 | inline void * operator new (size_t sz) { |
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26 | return getHeap()->malloc (sz); |
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27 | } |
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28 | inline void operator delete (void * ptr) { |
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29 | getHeap()->free (ptr); |
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30 | } |
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31 | inline void * operator new[] (size_t sz) { |
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32 | return getHeap()->malloc (sz); |
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33 | } |
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34 | inline void operator delete[] (void * ptr) { |
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35 | getHeap()->free (ptr); |
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36 | } |
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37 | // For some reason, g++ needs placement new to be overridden |
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38 | // as well, at least in conjunction with use of the STL. |
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39 | // Otherwise, this should be superfluous. |
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40 | inline void * operator new (size_t sz, void * p) { return p; } |
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41 | inline void * operator new[] (size_t sz, void * p) { return p; } |
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42 | |
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43 | private: |
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44 | inline static SuperHeap * getHeap (void) { |
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45 | static SuperHeap theHeap; |
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46 | return &theHeap; |
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47 | } |
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48 | }; |
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49 | |
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50 | } |
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51 | |
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52 | #endif |
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