From 82cc71261d3d32012d33d3bebe56ca5e3b0bcdbd Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Sun, 2 Oct 2022 15:32:49 -0700
Subject: Initial commit.

---
 infra/queue.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 infra/queue.h

(limited to 'infra/queue.h')

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();
+            }
+        }
+    };
+}
-- 
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