vivadoHLSのstreamを検証用に簡易的に実装したものです

hls_stream.h

#include <stdio.h>
#include <queue>

namespace hls {

	template <typename T>
	class stream {

		const char* name;
		std::queue<T> queue;

		public:
		stream() {}
		stream(const char* s): name(s) {}

		~stream() {
			if (!queue.empty()) {
				printf("%s contains leftover data.\n", name);
			}
		}

		T read() {
			if (queue.empty()) {
				printf("stream %s is read while empty.\n", name);
				exit(-1);
			}

			T tmp = queue.front();
			queue.pop();
			return tmp;
		}

		int size() {
			return queue.size();
		}

		void printname() {
			printf("%s", name);
		}

		void printlnname() {
			printf("%s\n", name);
		}

		void operator << (T input) {
			queue.push(input);
		}
	};
}

main.cpp

#include <stdio.h>

#include "hls_stream.h"


int main() {

	hls::stream<int> mystream = hls::stream<int>("myname");
	mystream.printlnname();

	mystream << 10;
	mystream << 50;

	printf("size: %d\n", mystream.size());
	printf("val: %d\n", mystream.read());
	printf("size: %d\n", mystream.size());
	printf("val: %d\n", mystream.read());

	return 0;
}