ceph/src/jaegertracing/opentelemetry-cpp/api/include/opentelemetry/trace/context.h

   1 // Copyright The OpenTelemetry Authors
   2 // SPDX-License-Identifier: Apache-2.0
   3
   4 #pragma once
   5
   6 #include "opentelemetry/context/context.h"
   7 #include "opentelemetry/trace/default_span.h"
   8 #include "opentelemetry/version.h"
   9
  10 OPENTELEMETRY_BEGIN_NAMESPACE
  11 namespace trace
  12 {
  13
  14 // Get Span from explicit context
  15 inline nostd::shared_ptr<Span> GetSpan(const opentelemetry::context::Context &context) noexcept
  16 {
  17   context::ContextValue span = context.GetValue(kSpanKey);
  18   if (nostd::holds_alternative<nostd::shared_ptr<Span>>(span))
  19   {
  20     return nostd::get<nostd::shared_ptr<Span>>(span);
  21   }
  22   return nostd::shared_ptr<Span>(new DefaultSpan(SpanContext::GetInvalid()));
  23 }
  24
  25 // Set Span into explicit context
  26 inline context::Context SetSpan(opentelemetry::context::Context &context,
  27                                 nostd::shared_ptr<Span> span) noexcept
  28 {
  29   return context.SetValue(kSpanKey, span);
  30 }
  31
  32 }  // namespace trace
  33 OPENTELEMETRY_END_NAMESPACE