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NekPtr.hpp
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1 ///////////////////////////////////////////////////////////////////////////////
2 //
3 // File NekPtr.hpp
4 //
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7 // The MIT License
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9 // Copyright (c) 2006 Scientific Computing and Imaging Institute,
10 // University of Utah (USA) and Department of Aeronautics, Imperial
11 // College London (UK).
12 //
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14 // Permission is hereby granted, free of charge, to any person obtaining a
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31 //
32 // Description: A lightweight shared pointer.
33 //
34 ///////////////////////////////////////////////////////////////////////////////
35 
36 #ifndef NEKTAR_LIB_UTILITIES_BASIC_UTILS_NEK_PTR_HPP
37 #define NEKTAR_LIB_UTILITIES_BASIC_UTILS_NEK_PTR_HPP
38 
41 
42 namespace Nektar
43 {
44  template<typename T>
45  class NekPtr
46  {
47  public:
48  NekPtr() :
49  m_data(0),
50  m_count(0),
51  m_size(0)
52  {
53  }
54 
55  explicit NekPtr(T* d) :
56  m_data(d),
57  m_count(MemoryManager<unsigned int>::RawAllocate(1)),
58  m_size(1)
59  {
60  *m_count = 1;
61  }
62 
63  NekPtr(T* d, unsigned int s) :
64  m_data(d),
65  m_count(MemoryManager<unsigned int>::RawAllocate(1)),
66  m_size(s)
67  {
68  *m_count = 1;
69  }
70 
71  NekPtr(const NekPtr<T>& rhs) :
72  m_data(rhs.m_data),
73  m_count(rhs.m_count),
74  m_size(rhs.m_size)
75  {
76  if( m_count != 0 )
77  {
78  *m_count += 1;
79  }
80  }
81 
83  {
84  NekPtr temp(rhs);
85  Swap(temp);
86  return *this;
87  }
88 
90  {
91  if( m_count == 0 )
92  {
93  return;
94  }
95 
96  *m_count -= 1;
97  if( *m_count == 0 )
98  {
102  }
103  }
104 
105  T* get() { return m_data; }
106  const T* get() const { return m_data; }
107 
108  private:
109  void Swap(NekPtr<T>& rhs)
110  {
111  std::swap(m_data, rhs.m_data);
112  std::swap(m_count, rhs.m_count);
113  std::swap(m_size, rhs.m_size);
114  }
115 
116  T* m_data;
117  unsigned int* m_count;
118  int m_size;
119  };
120 
121 }
122 
123 
124 #endif //NEKTAR_LIB_UTILITIES_BASIC_UTILS_NEK_PTR_HPP
125 
126 
127 
NekPtr(T *d, unsigned int s)
Definition: NekPtr.hpp:63
NekPtr(const NekPtr< T > &rhs)
Definition: NekPtr.hpp:71
General purpose memory allocation routines with the ability to allocate from thread specific memory p...
void Swap(NekPtr< T > &rhs)
Definition: NekPtr.hpp:109
NekPtr(T *d)
Definition: NekPtr.hpp:55
static void RawDeallocate(DataType *array, unsigned int NumberOfElements)
Deallocates memory allocated from RawAllocate.
unsigned int * m_count
Definition: NekPtr.hpp:117
NekPtr< T > & operator=(const NekPtr< T > &rhs)
Definition: NekPtr.hpp:82