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92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
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//=============================================================================
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/**
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* @file Basic_Stats.h
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*
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* $Id: Basic_Stats.h 95743 2012-05-13 12:29:28Z johnnyw $
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*
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* @author Carlos O'Ryan <coryan@uci.edu>
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*/
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//=============================================================================
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#ifndef ACE_BASIC_STATS_H
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#define ACE_BASIC_STATS_H
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#include /**/ "ace/pre.h"
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#include /**/ "ace/config-all.h"
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#include "ace/Basic_Types.h"
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#if !defined (ACE_LACKS_PRAGMA_ONCE)
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# pragma once
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#endif /* ACE_LACKS_PRAGMA_ONCE */
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ACE_BEGIN_VERSIONED_NAMESPACE_DECL
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/// Collect basic stats about a series of samples
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/**
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* Compute the average and standard deviation (aka jitter) for an
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* arbitrary number of samples, using constant space.
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* Normally used for latency statistics.
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*/
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class ACE_Export ACE_Basic_Stats
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{
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public:
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#if !defined (ACE_WIN32)
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typedef ACE_UINT32 scale_factor_type;
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#else
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typedef ACE_UINT64 scale_factor_type;
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#endif
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/// Constructor
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/**
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* The number of samples is pre-allocated, and cannot changes once
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* the class is initialized.
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*/
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ACE_Basic_Stats (void);
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/// The number of samples received so far
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ACE_UINT32 samples_count (void) const;
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/// Record one sample.
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void sample (ACE_UINT64 value);
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/// Update the values to reflect the stats in @a rhs.
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void accumulate (const ACE_Basic_Stats &rhs);
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/// Dump all the samples
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/**
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* Prints out the results, using @a msg as a prefix for each message and
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* scaling all the numbers by @a scale_factor. The latter is useful because
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* high resolution timer samples are acquired in clock ticks, but often
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* presented in microseconds.
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*/
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void dump_results (const ACE_TCHAR *msg,
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scale_factor_type scale_factor) const;
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/// The number of samples
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ACE_UINT32 samples_count_;
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/// The minimum value
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ACE_UINT64 min_;
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/// The number of the sample that had the minimum value
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ACE_UINT32 min_at_;
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/// The maximum value
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ACE_UINT64 max_;
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/// The number of the sample that had the maximum value
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ACE_UINT32 max_at_;
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/// The sum of all the values
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ACE_UINT64 sum_;
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};
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ACE_END_VERSIONED_NAMESPACE_DECL
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#if defined (__ACE_INLINE__)
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#include "ace/Basic_Stats.inl"
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#endif /* __ACE_INLINE__ */
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#include /**/ "ace/post.h"
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#endif /* ACE_BASIC_STATS_H */
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