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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include <mutex>
#include "opentelemetry/context/propagation/noop_propagator.h"
#include "opentelemetry/common/macros.h"
#include "opentelemetry/common/spin_lock_mutex.h"
#include "opentelemetry/nostd/shared_ptr.h"
#include "opentelemetry/version.h"
OPENTELEMETRY_BEGIN_NAMESPACE
namespace context
{
namespace propagation
{
class TextMapPropagator;
/* Stores the singleton TextMapPropagator */
class OPENTELEMETRY_EXPORT GlobalTextMapPropagator
{
public:
static nostd::shared_ptr<TextMapPropagator> GetGlobalPropagator() noexcept
{
std::lock_guard<common::SpinLockMutex> guard(GetLock());
return nostd::shared_ptr<TextMapPropagator>(GetPropagator());
}
static void SetGlobalPropagator(const nostd::shared_ptr<TextMapPropagator> &prop) noexcept
{
std::lock_guard<common::SpinLockMutex> guard(GetLock());
GetPropagator() = prop;
}
private:
OPENTELEMETRY_API_SINGLETON static nostd::shared_ptr<TextMapPropagator> &GetPropagator() noexcept
{
static nostd::shared_ptr<TextMapPropagator> propagator(new NoOpPropagator());
return propagator;
}
OPENTELEMETRY_API_SINGLETON static common::SpinLockMutex &GetLock() noexcept
{
static common::SpinLockMutex lock;
return lock;
}
};
} // namespace propagation
} // namespace context
OPENTELEMETRY_END_NAMESPACE
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