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#include <opentracing/noop.h>
#include <opentracing/tracer.h>
#include <mutex>
namespace opentracing {
BEGIN_OPENTRACING_ABI_NAMESPACE
namespace {
class TracerRegistry {
public:
static TracerRegistry& instance() noexcept {
static TracerRegistry result;
return result;
}
static std::shared_ptr<Tracer> RegisterTracer(
std::shared_ptr<Tracer>& tracer) noexcept {
std::lock_guard<std::mutex> lock_guard{mutex_};
is_registered_ = true;
tracer_.swap(tracer);
return tracer;
}
static std::shared_ptr<Tracer> tracer() noexcept {
std::lock_guard<std::mutex> lock_guard{mutex_};
return tracer_;
}
static bool is_registered() noexcept {
std::lock_guard<std::mutex> lock_guard{mutex_};
return is_registered_;
}
private:
static std::mutex mutex_;
static bool is_registered_;
static std::shared_ptr<Tracer> tracer_;
};
std::mutex TracerRegistry::mutex_;
bool TracerRegistry::is_registered_{false};
std::shared_ptr<Tracer> TracerRegistry::tracer_{MakeNoopTracer()};
} // namespace
std::shared_ptr<Tracer> Tracer::Global() noexcept {
return TracerRegistry::instance().tracer();
}
std::shared_ptr<Tracer> Tracer::InitGlobal(
std::shared_ptr<Tracer> tracer) noexcept {
return TracerRegistry::instance().RegisterTracer(tracer);
}
bool Tracer::IsGlobalTracerRegistered() noexcept {
return TracerRegistry::instance().is_registered();
}
END_OPENTRACING_ABI_NAMESPACE
} // namespace opentracing
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