[176] | 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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