mirror of https://github.com/docker/cli.git
43 lines
1.0 KiB
Go
43 lines
1.0 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package aggregate // import "go.opentelemetry.io/otel/sdk/metric/internal/aggregate"
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import (
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"sync"
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"go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
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"go.opentelemetry.io/otel/sdk/metric/metricdata"
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)
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var exemplarPool = sync.Pool{
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New: func() any { return new([]exemplar.Exemplar) },
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}
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func collectExemplars[N int64 | float64](out *[]metricdata.Exemplar[N], f func(*[]exemplar.Exemplar)) {
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dest := exemplarPool.Get().(*[]exemplar.Exemplar)
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defer func() {
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*dest = (*dest)[:0]
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exemplarPool.Put(dest)
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}()
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*dest = reset(*dest, len(*out), cap(*out))
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f(dest)
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*out = reset(*out, len(*dest), cap(*dest))
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for i, e := range *dest {
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(*out)[i].FilteredAttributes = e.FilteredAttributes
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(*out)[i].Time = e.Time
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(*out)[i].SpanID = e.SpanID
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(*out)[i].TraceID = e.TraceID
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switch e.Value.Type() {
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case exemplar.Int64ValueType:
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(*out)[i].Value = N(e.Value.Int64())
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case exemplar.Float64ValueType:
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(*out)[i].Value = N(e.Value.Float64())
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}
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}
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}
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