From a490cf9fece4c4b900d219740123ec8d81c6abb2 Mon Sep 17 00:00:00 2001
From: aqua <aqua@iserlohn-fortress.net>
Date: Sun, 25 Dec 2022 17:53:05 +0200
Subject: Add sched/roundrobin tests

---
 src/task.h | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 src/task.h

(limited to 'src/task.h')

diff --git a/src/task.h b/src/task.h
new file mode 100644
index 0000000..381f628
--- /dev/null
+++ b/src/task.h
@@ -0,0 +1,78 @@
+#pragma once
+
+/**
+ * Representation of a task in the system
+ */
+struct Task {
+  const char *name;
+  int id;
+  int priority;
+  int burst;
+};
+
+#ifdef __cplusplus
+template <typename T> struct Queue {
+  struct Item {
+    Item(T *node) : node(node) {}
+    T *node;
+    Item *next = nullptr;
+
+    [[nodiscard]] bool
+    operator==(const T *other) const
+    {
+      return node == other;
+    }
+  };
+
+  ~Queue() noexcept
+  {
+    for (auto *it = head; it != nullptr;) {
+      auto *current = it;
+      it = it->next;
+      delete current->node;
+      delete current;
+    }
+  }
+
+  /// Insert item at the end of the queue
+  void
+  insert(T *item)
+  {
+    if (head == nullptr) {
+      head = new Item(item);
+      tail = head;
+    }
+    else {
+      tail->next = new Item(item);
+      tail = tail->next;
+    }
+  }
+
+  void
+  remove(T *item)
+  {
+    if (head == nullptr) return;
+    if (item == head->node) {
+      auto *it = head;
+      head = head->next;
+      if (*tail == item) tail = nullptr;
+      delete it;
+      return;
+    }
+
+    Item *prev = nullptr;
+    for (auto *it = head; it != nullptr; it = it->next) {
+      if (it->node == item) {
+        if (prev) { prev->next = it->next; }
+        if (tail == it) { tail = prev; }
+        delete it;
+        return;
+      }
+      prev = it;
+    }
+  }
+
+  Item *head = nullptr;
+  Item *tail = nullptr;
+};
+#endif
-- 
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