1 files changed, 29 insertions, 0 deletions

diff --git a/infra/queue.h b/infra/queue.h
new file mode 100644
index 0000000..1e490bc
--- /dev/null
+++ b/infra/queue.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <cassert>
+#include <deque>
+#include <optional>
+#include <utility>
+
+#include "infra/port.h"
+#include "infra/sim.h"
+
+namespace infra {
+    template<typename T, unsigned int size> struct queue : public sim {
+        port<T> input;
+        port<T> *output = nullptr;
+        std::deque<T> elements;
+
+        void clock() {
+            if (input.can_read() && elements.size() < size) {
+                auto x = input.read();
+                elements.emplace_back(std::move(x));
+            }
+            if (output->can_write() && !elements.empty()) {
+                auto &x = elements.front();
+                output->write(std::move(x));
+                elements.pop_front();
+            }
+        }
+    };
+}