vtkHeap.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkHeap_h
#define vtkHeap_h
 
#include "vtkCommonMiscModule.h" // For export macro
#include "vtkObject.h"
 
VTK_ABI_NAMESPACE_BEGIN
class vtkHeapBlock; // forward declaration
 
class VTKCOMMONMISC_EXPORT vtkHeap : public vtkObject
{
public:
  static vtkHeap* New();
  vtkTypeMacro(vtkHeap, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void* AllocateMemory(size_t n);
 
 
  virtual void SetBlockSize(size_t);
  virtual size_t GetBlockSize() { return this->BlockSize; }
 
 
  vtkGetMacro(NumberOfBlocks, int);
  vtkGetMacro(NumberOfAllocations, int);
 
  void Reset();
 
  char* StringDup(const char* str);
 
protected:
  vtkHeap();
  ~vtkHeap() override;
 
  void Add(size_t blockSize);
  void CleanAll();
  vtkHeapBlock* DeleteAndNext();
 
  size_t BlockSize;
  int NumberOfAllocations;
  int NumberOfBlocks;
  size_t Alignment;
 
  // Manage the blocks
  vtkHeapBlock* First;
  vtkHeapBlock* Last;
  vtkHeapBlock* Current;
  // Manage the memory in the block
  size_t Position; // the position in the Current block
 
private:
  vtkHeap(const vtkHeap&) = delete;
  void operator=(const vtkHeap&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif