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CommDataType.cpp
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1 ///////////////////////////////////////////////////////////////////////////////
2 //
3 // File CommDataType.cpp
4 //
5 // For more information, please see: http://www.nektar.info
6 //
7 // The MIT License
8 //
9 // Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
10 // Department of Aeronautics, Imperial College London (UK), and Scientific
11 // Computing and Imaging Institute, University of Utah (USA).
12 //
13 // License for the specific language governing rights and limitations under
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31 //
32 // Description: Define static members for the different data types
33 //
34 ///////////////////////////////////////////////////////////////////////////////
35 
38 
39 namespace Nektar
40 {
41 namespace LibUtilities
42 {
43 
44 /**
45  * @brief Return the size in bytes of a data type @p dt.
46  *
47  * @param dt Data type
48  *
49  * @return Size of @p dt in bytes.
50  */
52 {
53 #ifdef NEKTAR_USE_MPI
54  int size;
55  MPI_Type_size(dt, &size);
56  return size;
57 #else
58  switch (dt)
59  {
60  case MPI_INT:
61  return sizeof(int);
62  case MPI_UNSIGNED:
63  return sizeof(unsigned);
64  case MPI_LONG:
65  return sizeof(long);
66  case MPI_UNSIGNED_LONG:
67  return sizeof(unsigned long);
68  case MPI_LONG_LONG:
69  return sizeof(long long);
71  return sizeof(unsigned long long);
72  case MPI_FLOAT:
73  return sizeof(float);
74  case MPI_DOUBLE:
75  return sizeof(double);
76  case MPI_LONG_DOUBLE:
77  return sizeof(long double);
78  default:
79  ASSERTL0(false, "Unrecognised datatype!");
80  }
81  return sizeof(int);
82 #endif
83 }
84 
85 /// Type trait mapping an int to MPI_INT
87 /// Type trait mapping an unsigned int to MPI_UNSIGNED
89 /// Type trait mapping a long int to MPI_LONG
91 /// Type trait mapping an unsigned long int to MPI_UNSIGNED_LONG
92 template <>
94 /// Type trait mapping a long long int to MPI_LONG_LONG
96 /// Type trait mapping an unsigned long long int to MPI_UNSIGNED_LONG_LONG
97 template <>
100 /// Type trait mapping a float to MPI_FLOAT
102 /// Type trait mapping a double to MPI_DOUBLE
104 /// Type trait mapping a long double to MPI_LONG_DOUBLE
105 template <>
107 }
108 }
#define ASSERTL0(condition, msg)
Definition: ErrorUtil.hpp:198
int CommDataTypeGetSize(CommDataType dt)
Return the size in bytes of a data type dt.