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70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Contains source code from the article "Radix Sort Revisited".
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* \file Radix.h
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* \author Pierre Terdiman
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* \date April, 4, 2000
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Include Guard
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#ifndef NV_CORE_RADIXSORT_H
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#define NV_CORE_RADIXSORT_H
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#include <nvcore/nvcore.h>
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#define RADIX_LOCAL_RAM
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class NVCORE_API RadixSort {
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NV_FORBID_COPY(RadixSort);
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public:
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// Constructor/Destructor
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RadixSort();
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~RadixSort();
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// Sorting methods
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RadixSort & sort(const uint32* input, uint32 nb, bool signedvalues=true);
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RadixSort & sort(const float* input, uint32 nb);
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//! Access to results. mIndices is a list of indices in sorted order, i.e. in the order you may further process your data
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inline uint32 * indices() const { return mIndices; }
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//! mIndices2 gets trashed on calling the sort routine, but otherwise you can recycle it the way you want.
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inline uint32 * recyclable() const { return mIndices2; }
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// Stats
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uint32 usedRam() const;
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//! Returns the total number of calls to the radix sorter.
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inline uint32 totalCalls() const { return mTotalCalls; }
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//! Returns the number of premature exits due to temporal coherence.
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inline uint32 hits() const { return mNbHits; }
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private:
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#ifndef RADIX_LOCAL_RAM
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uint32* mHistogram; //!< Counters for each byte
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uint32* mOffset; //!< Offsets (nearly a cumulative distribution function)
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#endif
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uint32 mCurrentSize; //!< Current size of the indices list
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uint32 mPreviousSize; //!< Size involved in previous call
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uint32* mIndices; //!< Two lists, swapped each pass
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uint32* mIndices2;
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// Stats
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uint32 mTotalCalls;
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uint32 mNbHits;
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// Internal methods
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bool resize(uint32 nb);
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void resetIndices();
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};
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#endif // NV_CORE_RADIXSORT_H
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