folly::Histogram< T >::AvgFromBucket Struct Reference

#include <Histogram.h>

Public Member Functions
ValueType	operator() (const Bucket &bucket) const

Detailed Description

template<typename T>
struct folly::Histogram< T >::AvgFromBucket

Definition at line 456 of file Histogram.h.

Member Function Documentation

template<typename T>

ValueType folly::Histogram< T >::AvgFromBucket::operator() ( const Bucket &  bucket ) const

inline

Definition at line 457 of file Histogram.h.

References folly::detail::Bucket< T >::count, int64_t, and folly::detail::Bucket< T >::sum.

                                                     {
      if (bucket.count == 0) {
        return ValueType(0);
      }
      // Cast bucket.count to a signed integer type.  This ensures that we
      // perform division properly here: If bucket.sum is a signed integer
      // type but we divide by an unsigned number, unsigned division will be
      // performed and bucket.sum will be converted to unsigned first.
      // If bucket.sum is unsigned, the code will still do unsigned division
      // correctly.
      //
      // The only downside is if bucket.count is large enough to be negative
      // when treated as signed.  That should be extremely unlikely, though.
      return bucket.sum / static_cast<int64_t>(bucket.count);
    }

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The documentation for this struct was generated from the following file:

• proxygen/folly/folly/stats/Histogram.h