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#ifndef LEAKY_REF_COUNTED_SINGLETON_INL_H_
#error "Direct inclusion of this file is not allowed, include leaky_ref_counted_singleton.h"
// For the sake of sane code completion.
#include "leaky_ref_counted_singleton.h"
#endif
#include "new.h"
#include <atomic>
#include <mutex>
#include <util/system/compiler.h>
#include <util/system/sanitizers.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
template <class T, class... TArgs>
TIntrusivePtr<T> LeakyRefCountedSingleton(TArgs&&... args)
{
static std::atomic<T*> Ptr;
auto* ptr = Ptr.load(std::memory_order::acquire);
if (Y_LIKELY(ptr)) {
return ptr;
}
static std::once_flag Initialized;
std::call_once(Initialized, [&] {
auto ptr = New<T>(std::forward<TArgs>(args)...);
Ref(ptr.Get());
Ptr.store(ptr.Get());
});
return Ptr.load();
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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