.. _program_listing_file_include_opentelemetry_trace_provider.h:

Program Listing for File provider.h
===================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_opentelemetry_trace_provider.h>` (``include/opentelemetry/trace/provider.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #pragma once
   
   #include <mutex>
   
   #include "opentelemetry/common/spin_lock_mutex.h"
   #include "opentelemetry/nostd/shared_ptr.h"
   #include "opentelemetry/trace/noop.h"
   #include "opentelemetry/trace/tracer_provider.h"
   
   OPENTELEMETRY_BEGIN_NAMESPACE
   namespace trace
   {
   class Provider
   {
   public:
     static nostd::shared_ptr<TracerProvider> GetTracerProvider() noexcept
     {
       std::lock_guard<common::SpinLockMutex> guard(GetLock());
       return nostd::shared_ptr<TracerProvider>(GetProvider());
     }
   
     static void SetTracerProvider(nostd::shared_ptr<TracerProvider> tp) noexcept
     {
       std::lock_guard<common::SpinLockMutex> guard(GetLock());
       GetProvider() = tp;
     }
   
   private:
     static nostd::shared_ptr<TracerProvider> &GetProvider() noexcept
     {
       static nostd::shared_ptr<TracerProvider> provider(new NoopTracerProvider);
       return provider;
     }
   
     static common::SpinLockMutex &GetLock() noexcept
     {
       static common::SpinLockMutex lock;
       return lock;
     }
   };
   
   }  // namespace trace
   OPENTELEMETRY_END_NAMESPACE