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Util.h
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28 
29 #ifndef UTIL_H
30 #define UTIL_H
31 
32 #include <stdint.h> // for uint64_t
33 #include <limits> // for numeric_limits
34 
35 namespace ArgusSamples
36 {
37 
38 /**
39  * A time value. Supports conversion to different time units.
40  */
41 class TimeValue
42 {
43 public:
45  : m_nSec(0)
46  {
47  }
48 
49  /**
50  * Types used for values with various units
51  */
52  typedef uint64_t SecType;
53  typedef uint64_t MSecType;
54  typedef uint64_t USecType;
55  typedef uint64_t NSecType;
56  typedef float CyclesPerSecType;
57 
58  // construct a infinite time value
60  {
61  return TimeValue(std::numeric_limits<NSecType>::max());
62  }
63 
64  // functions to construct from various time units
65  static TimeValue fromSec(float sec)
66  {
67  return TimeValue(static_cast<NSecType>(sec * 1e9));
68  }
69 
71  {
72  return TimeValue(sec * 1000000000);
73  }
74 
76  {
77  return TimeValue(mSec * 1000000);
78  }
79 
81  {
82  return TimeValue(uSec * 1000);
83  }
84 
86  {
87  return TimeValue(nSec);
88  }
89 
91  {
92  return TimeValue(static_cast<NSecType>(1e9 / static_cast<double>(cyclesPerSec)));
93  }
94 
95  // functions to set from various time uints
96  void setFromSec(SecType sec)
97  {
98  m_nSec = sec * 1000000000;
99  }
100 
102  {
103  m_nSec = mSec * 1000000;
104  }
105 
107  {
108  m_nSec = uSec * 1000;
109  }
110 
112  {
113  m_nSec = nSec;
114  }
115 
116  // functions to convert to various time units
117  SecType toSec() const
118  {
119  return m_nSec / 1000000000;
120  }
121 
122  MSecType toMSec() const
123  {
124  return m_nSec / 1000000;
125  }
126 
127  USecType toUSec() const
128  {
129  return m_nSec / 1000;
130  }
131 
132  NSecType toNSec() const
133  {
134  return m_nSec;
135  }
136 
138  {
139  if (m_nSec == 0.0f)
140  return std::numeric_limits<CyclesPerSecType>::max();
141 
142  return static_cast<CyclesPerSecType>(1e9 / static_cast<double>(m_nSec));
143  }
144 
145  // comparision and equality operators
146  bool operator == (const TimeValue& rhs) const
147  {
148  return (m_nSec == rhs.m_nSec);
149  }
150 
151  bool operator != (const TimeValue &rhs) const
152  {
153  return !(operator == (rhs));
154  }
155 
156  bool operator < (const TimeValue& rhs) const
157  {
158  return (m_nSec < rhs.m_nSec);
159  }
160 
161  bool operator >= (const TimeValue &rhs) const
162  {
163  return !(operator < (rhs));
164  }
165 
166  bool operator <= (const TimeValue &rhs) const
167  {
168  return (m_nSec <= rhs.m_nSec);
169  }
170 
171  bool operator > (const TimeValue &rhs) const
172  {
173  return !(operator <= (rhs));
174  }
175 
176  TimeValue operator + (const TimeValue& rhs) const
177  {
178  return (m_nSec + rhs.m_nSec);
179  }
180 
181  TimeValue operator - (const TimeValue& rhs) const
182  {
183  return (m_nSec - rhs.m_nSec);
184  }
185 
186 private:
188  : m_nSec(value)
189  {
190  }
191 
193 };
194 
195 /*!
196  * Get the current time.
197  */
199 
200 }; // namespace ArgusSamples
201 
202 #endif // UTIL_H