cxx-benchmarks/benchmark-shared-unique.h

#include <memory>

struct Large {
	size_t x;
	char filler[512 - sizeof(size_t)] = {};

	Large(size_t x) : x(x) {}
};

void* forward_raw(void* p);

std::unique_ptr<size_t> forward_unique(std::unique_ptr<size_t>&& p);
std::shared_ptr<size_t> forward_shared(std::shared_ptr<size_t>&& p);

std::unique_ptr<Large> forward_unique_large(std::unique_ptr<Large>&& p);
std::shared_ptr<Large> forward_shared_large(std::shared_ptr<Large>&& p);