1 | // -*- C++ -*- |
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2 | |
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3 | #ifndef _BASEHOARDMANAGER_H_ |
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4 | #define _BASEHOARDMANAGER_H_ |
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5 | |
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6 | /** |
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7 | * @class BaseHoardManager |
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8 | * @brief The top of the hoard manager hierarchy. |
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9 | * |
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10 | */ |
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11 | |
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12 | #include "sassert.h" |
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13 | |
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14 | template <class SuperblockType_> |
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15 | class BaseHoardManager { |
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16 | public: |
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17 | |
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18 | BaseHoardManager (void) |
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19 | : _magic (0xedded00d) |
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20 | {} |
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21 | |
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22 | virtual ~BaseHoardManager (void) |
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23 | {} |
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24 | |
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25 | inline int isValid (void) const { |
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26 | return (_magic == 0xedded00d); |
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27 | } |
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28 | |
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29 | // Export the superblock type. |
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30 | typedef SuperblockType_ SuperblockType; |
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31 | |
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32 | /// Free an object. |
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33 | inline virtual void free (void *) {} |
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34 | |
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35 | /// Lock this memory manager. |
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36 | inline virtual void lock (void) {} |
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37 | |
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38 | /// Unlock this memory manager. |
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39 | inline virtual void unlock (void) {}; |
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40 | |
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41 | /// Return the size of an object. |
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42 | static inline size_t getSize (void * ptr) { |
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43 | SuperblockType * s = getSuperblock (ptr); |
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44 | assert (s->isValidSuperblock()); |
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45 | return s->getSize (ptr); |
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46 | } |
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47 | |
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48 | /// @brief Find the superblock corresponding to a pointer via bitmasking. |
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49 | /// @note All superblocks <em>must</em> be naturally aligned, and powers of two. |
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50 | |
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51 | static inline SuperblockType * getSuperblock (void * ptr) { |
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52 | return SuperblockType::getSuperblock (ptr); |
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53 | } |
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54 | |
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55 | private: |
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56 | |
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57 | enum { SuperblockSize = sizeof(SuperblockType) }; |
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58 | |
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59 | HL::sassert<((SuperblockSize & (SuperblockSize - 1)) == 0)> EnsureSuperblockSizeIsPowerOfTwo; |
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60 | |
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61 | const unsigned long _magic; |
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62 | |
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63 | }; |
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64 | |
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65 | #endif |
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