github.com/theQRL/go-zond@v0.1.1/metrics/inactive.go (about)

     1  // Copyright 2023 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package metrics
    18  
    19  // compile-time checks that interfaces are implemented.
    20  var (
    21  	_ SampleSnapshot    = (*emptySnapshot)(nil)
    22  	_ HistogramSnapshot = (*emptySnapshot)(nil)
    23  	_ CounterSnapshot   = (*emptySnapshot)(nil)
    24  	_ GaugeSnapshot     = (*emptySnapshot)(nil)
    25  	_ MeterSnapshot     = (*emptySnapshot)(nil)
    26  	_ EWMASnapshot      = (*emptySnapshot)(nil)
    27  	_ TimerSnapshot     = (*emptySnapshot)(nil)
    28  )
    29  
    30  type emptySnapshot struct{}
    31  
    32  func (*emptySnapshot) Count() int64                       { return 0 }
    33  func (*emptySnapshot) Max() int64                         { return 0 }
    34  func (*emptySnapshot) Mean() float64                      { return 0.0 }
    35  func (*emptySnapshot) Min() int64                         { return 0 }
    36  func (*emptySnapshot) Percentile(p float64) float64       { return 0.0 }
    37  func (*emptySnapshot) Percentiles(ps []float64) []float64 { return make([]float64, len(ps)) }
    38  func (*emptySnapshot) Size() int                          { return 0 }
    39  func (*emptySnapshot) StdDev() float64                    { return 0.0 }
    40  func (*emptySnapshot) Sum() int64                         { return 0 }
    41  func (*emptySnapshot) Values() []int64                    { return []int64{} }
    42  func (*emptySnapshot) Variance() float64                  { return 0.0 }
    43  func (*emptySnapshot) Value() int64                       { return 0 }
    44  func (*emptySnapshot) Rate() float64                      { return 0.0 }
    45  func (*emptySnapshot) Rate1() float64                     { return 0.0 }
    46  func (*emptySnapshot) Rate5() float64                     { return 0.0 }
    47  func (*emptySnapshot) Rate15() float64                    { return 0.0 }
    48  func (*emptySnapshot) RateMean() float64                  { return 0.0 }