Program Listing for File provider.h
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include <mutex>
#include "opentelemetry/common/macros.h"
#include "opentelemetry/common/spin_lock_mutex.h"
#include "opentelemetry/metrics/noop.h"
#include "opentelemetry/nostd/shared_ptr.h"
#include "opentelemetry/version.h"
OPENTELEMETRY_BEGIN_NAMESPACE
namespace metrics
{
class MeterProvider;
class Provider
{
public:
static nostd::shared_ptr<MeterProvider> GetMeterProvider() noexcept
{
std::lock_guard<common::SpinLockMutex> guard(GetLock());
return nostd::shared_ptr<MeterProvider>(GetProvider());
}
static void SetMeterProvider(nostd::shared_ptr<MeterProvider> tp) noexcept
{
std::lock_guard<common::SpinLockMutex> guard(GetLock());
GetProvider() = tp;
}
private:
OPENTELEMETRY_API_SINGLETON static nostd::shared_ptr<MeterProvider> &GetProvider() noexcept
{
static nostd::shared_ptr<MeterProvider> provider(new NoopMeterProvider);
return provider;
}
OPENTELEMETRY_API_SINGLETON static common::SpinLockMutex &GetLock() noexcept
{
static common::SpinLockMutex lock;
return lock;
}
};
} // namespace metrics
OPENTELEMETRY_END_NAMESPACE