ceph-csi/vendor/go.opentelemetry.io/otel/sdk/trace/tracer.go
Humble Chirammal aa698bc3e1 rebase: update kubernetes and libraries to v1.22.0 version
Kubernetes v1.22 version has been released and this update
ceph csi dependencies to use the same version.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
2021-08-12 09:55:50 +00:00

76 lines
2.2 KiB
Go

// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package trace // import "go.opentelemetry.io/otel/sdk/trace"
import (
"context"
rt "runtime/trace"
"go.opentelemetry.io/otel/trace"
"go.opentelemetry.io/otel/sdk/instrumentation"
)
type tracer struct {
provider *TracerProvider
instrumentationLibrary instrumentation.Library
}
var _ trace.Tracer = &tracer{}
// Start starts a Span and returns it along with a context containing it.
//
// The Span is created with the provided name and as a child of any existing
// span context found in the passed context. The created Span will be
// configured appropriately by any SpanOption passed. Any Timestamp option
// passed will be used as the start time of the Span's life-cycle.
func (tr *tracer) Start(ctx context.Context, name string, options ...trace.SpanOption) (context.Context, trace.Span) {
config := trace.NewSpanConfig(options...)
// For local spans created by this SDK, track child span count.
if p := trace.SpanFromContext(ctx); p != nil {
if sdkSpan, ok := p.(*span); ok {
sdkSpan.addChild()
}
}
span := startSpanInternal(ctx, tr, name, config)
for _, l := range config.Links {
span.addLink(l)
}
span.SetAttributes(config.Attributes...)
span.tracer = tr
if span.IsRecording() {
sps, _ := tr.provider.spanProcessors.Load().(spanProcessorStates)
for _, sp := range sps {
sp.sp.OnStart(ctx, span)
}
}
ctx, span.executionTracerTaskEnd = func(ctx context.Context) (context.Context, func()) {
if !rt.IsEnabled() {
// Avoid additional overhead if
// runtime/trace is not enabled.
return ctx, func() {}
}
nctx, task := rt.NewTask(ctx, name)
return nctx, task.End
}(ctx)
return trace.ContextWithSpan(ctx, span), span
}