335 class ArenaBitMap : public BitMap {
336 public:
337 // Clears the bitmap memory.
338 ArenaBitMap(Arena* arena, idx_t size_in_bits);
339
340 private:
341 // Don't allow copy or assignment.
342 ArenaBitMap(const ArenaBitMap&);
343 ArenaBitMap& operator=(const ArenaBitMap&);
344 };
345
346 // A BitMap with storage in the CHeap.
347 class CHeapBitMap : public BitMap {
348
349 private:
350 // Don't allow copy or assignment, to prevent the
351 // allocated memory from leaking out to other instances.
352 CHeapBitMap(const CHeapBitMap&);
353 CHeapBitMap& operator=(const CHeapBitMap&);
354
355 public:
356 CHeapBitMap() : BitMap(NULL, 0) {}
357 // Clears the bitmap memory.
358 CHeapBitMap(idx_t size_in_bits);
359 ~CHeapBitMap();
360
361 // Resize the backing bitmap memory.
362 //
363 // Old bits are transfered to the new memory
364 // and the extended memory is cleared.
365 void resize(idx_t new_size_in_bits);
366
367 // Set up and clear the bitmap memory.
368 //
369 // Precondition: The bitmap was default constructed and has
370 // not yet had memory allocated via resize or initialize.
371 void initialize(idx_t size_in_bits);
372
373 // Set up and clear the bitmap memory.
374 //
375 // Can be called on previously initialized bitmaps.
376 void reinitialize(idx_t size_in_bits);
377 };
378
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335 class ArenaBitMap : public BitMap {
336 public:
337 // Clears the bitmap memory.
338 ArenaBitMap(Arena* arena, idx_t size_in_bits);
339
340 private:
341 // Don't allow copy or assignment.
342 ArenaBitMap(const ArenaBitMap&);
343 ArenaBitMap& operator=(const ArenaBitMap&);
344 };
345
346 // A BitMap with storage in the CHeap.
347 class CHeapBitMap : public BitMap {
348
349 private:
350 // Don't allow copy or assignment, to prevent the
351 // allocated memory from leaking out to other instances.
352 CHeapBitMap(const CHeapBitMap&);
353 CHeapBitMap& operator=(const CHeapBitMap&);
354
355 // NMT memory type
356 MEMFLAGS _flags;
357
358 public:
359 CHeapBitMap() : BitMap(NULL, 0), _flags(mtInternal) {}
360 CHeapBitMap(MEMFLAGS flags) : BitMap(NULL, 0), _flags(flags) {}
361 // Clears the bitmap memory.
362 CHeapBitMap(idx_t size_in_bits);
363 CHeapBitMap(idx_t size_in_bits, MEMFLAGS flags);
364 ~CHeapBitMap();
365
366 // Resize the backing bitmap memory.
367 //
368 // Old bits are transfered to the new memory
369 // and the extended memory is cleared.
370 void resize(idx_t new_size_in_bits);
371
372 // Set up and clear the bitmap memory.
373 //
374 // Precondition: The bitmap was default constructed and has
375 // not yet had memory allocated via resize or initialize.
376 void initialize(idx_t size_in_bits);
377
378 // Set up and clear the bitmap memory.
379 //
380 // Can be called on previously initialized bitmaps.
381 void reinitialize(idx_t size_in_bits);
382 };
383
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