Program Listing for File scope.h

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// Copyright 2020, 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.

#pragma once

#include "opentelemetry/context/runtime_context.h"
#include "opentelemetry/trace/span.h"
#include "opentelemetry/version.h"

OPENTELEMETRY_BEGIN_NAMESPACE
namespace trace
{
class Scope final
{
public:
  Scope(const nostd::shared_ptr<Span> &span) noexcept
      : token_(context::RuntimeContext::Attach(
            context::RuntimeContext::GetCurrent().SetValue(kSpanKey, span)))
  {}

private:
  nostd::unique_ptr<context::Token> token_;
};

}  // namespace trace
OPENTELEMETRY_END_NAMESPACE