SST  13.1.0
Structural Simulation Toolkit
statnull.h
1 // Copyright 2009-2023 NTESS. Under the terms
2 // of Contract DE-NA0003525 with NTESS, the U.S.
3 // Government retains certain rights in this software.
4 //
5 // Copyright (c) 2009-2023, NTESS
6 // All rights reserved.
7 //
8 // This file is part of the SST software package. For license
9 // information, see the LICENSE file in the top level directory of the
10 // distribution.
11 
12 #ifndef SST_CORE_STATAPI_STATNULL_H
13 #define SST_CORE_STATAPI_STATNULL_H
14 
15 #include "sst/core/sst_types.h"
16 #include "sst/core/statapi/statbase.h"
17 #include "sst/core/warnmacros.h"
18 
19 namespace SST {
20 namespace Statistics {
21 
22 // NOTE: When calling base class members of classes derived from
23 // a templated base class. The user must use "this->" in
24 // order to call base class members (to avoid a compiler
25 // error) because they are "nondependant named" and the
26 // templated base class is a "dependant named". The
27 // compiler will not look in dependant named base classes
28 // when looking up indepenedent names.
29 // See: http://www.parashift.com/c++-faq-lite/nondependent-name-lookup-members.html
30 
31 /**
32  \class NullStatistic
33 
34  An empty statistic place holder.
35 
36  @tparam T A template for holding the main data type of this statistic
37 */
38 template <class T, bool B = std::is_fundamental<T>::value>
40 {};
41 
42 template <class T>
43 struct NullStatisticBase<T, true> : public Statistic<T>
44 {
45 
47  BaseComponent* comp, const std::string& statName, const std::string& statSubId, Params& statParams) :
48  Statistic<T>(comp, statName, statSubId, statParams)
49  {
50  // Set the Name of this Statistic
51  this->setStatisticTypeName("NULL");
52  }
53 
54  void addData_impl(T UNUSED(data)) override {}
55 
56  void addData_impl_Ntimes(uint64_t UNUSED(N), T UNUSED(data)) override {}
57 };
58 
59 template <class... Args>
60 struct NullStatisticBase<std::tuple<Args...>, false> : public Statistic<std::tuple<Args...>>
61 {
62 
64  BaseComponent* comp, const std::string& statName, const std::string& statSubId, Params& statParams) :
65  Statistic<std::tuple<Args...>>(comp, statName, statSubId, statParams)
66  {
67  // Set the Name of this Statistic
68  this->setStatisticTypeName("NULL");
69  }
70 
71  void addData_impl(Args... UNUSED(data)) override {}
72 
73  void addData_impl_Ntimes(uint64_t UNUSED(N), Args... UNUSED(data)) override {}
74 };
75 
76 template <class T>
77 struct NullStatisticBase<T, false> : public Statistic<T>
78 {
79 
81  BaseComponent* comp, const std::string& statName, const std::string& statSubId, Params& statParams) :
82  Statistic<T>(comp, statName, statSubId, statParams)
83  {
84  // Set the Name of this Statistic
85  this->setStatisticTypeName("NULL");
86  }
87 
88  void addData_impl(T&& UNUSED(data)) override {}
89  void addData_impl(const T& UNUSED(data)) override {}
90 
91  void addData_impl(uint64_t UNUSED(N), T&& UNUSED(data)) override {}
92  void addData_impl(uint64_t UNUSED(N), const T& UNUSED(data)) override {}
93 };
94 
95 template <class T>
96 struct NullStatistic : public NullStatisticBase<T>
97 {
98 
99  SST_ELI_DECLARE_STATISTIC_TEMPLATE(
101  "sst",
102  "NullStatistic",
103  SST_ELI_ELEMENT_VERSION(1,0,0),
104  "Null object it ignore all collections",
105  "SST::Statistic<T>")
106 
107  NullStatistic(BaseComponent* comp, const std::string& statName, const std::string& statSubId, Params& statParam) :
108  NullStatisticBase<T>(comp, statName, statSubId, statParam)
109  {}
110 
111  ~NullStatistic() {}
112 
113  void clearStatisticData() override
114  {
115  // Do Nothing
116  }
117 
118  void registerOutputFields(StatisticFieldsOutput* UNUSED(statOutput)) override
119  {
120  // Do Nothing
121  }
122 
123  void outputStatisticFields(StatisticFieldsOutput* UNUSED(statOutput), bool UNUSED(EndOfSimFlag)) override
124  {
125  // Do Nothing
126  }
127 
128  bool isReady() const override { return true; }
129 
130  bool isNullStatistic() const override { return true; }
131 
132  static bool isLoaded() { return loaded_; }
133 
134 private:
135  static bool loaded_;
136 };
137 
138 template <class T>
139 bool NullStatistic<T>::loaded_ = true;
140 
141 template <>
142 struct NullStatistic<void> : public Statistic<void>
143 {
144  SST_ELI_REGISTER_DERIVED(
147  "sst",
148  "NullStatistic",
149  SST_ELI_ELEMENT_VERSION(1,0,0),
150  "Null statistic for custom (void) stats"
151  )
152 
153  SST_ELI_INTERFACE_INFO("Statistic<void>")
154 
155  NullStatistic(BaseComponent* comp, const std::string& statName, const std::string& statSubId, Params& statParams) :
156  Statistic<void>(comp, statName, statSubId, statParams)
157  {
158  // Set the Name of this Statistic
159  this->setStatisticTypeName("NULL");
160  }
161 };
162 
163 } // namespace Statistics
164 } // namespace SST
165 
166 #endif // SST_CORE_STATAPI_STATNULL_H
Main component object for the simulation.
Definition: baseComponent.h:52
Parameter store.
Definition: params.h:56
Definition: statoutput.h:143
void Statistic has special meaning in that it does not collect fields in the usual way through the ad...
Definition: statbase.h:428
Forms the template defined base class for statistics gathering within SST.
Definition: statbase.h:361
Definition: statnull.h:40
Definition: statnull.h:143
An empty statistic place holder.
Definition: statnull.h:97