spinlock, pool: add

Signed-off-by: Simon Rozman <simon@rozman.si>

UnitTests/pool.cpp

@@ -0,0 +1,42 @@
+/*
+	SPDX-License-Identifier: MIT
+	Copyright © 2023 Amebis
+*/
+
+#include "pch.hpp"
+
+using namespace std;
+#ifdef _WIN32
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+#endif
+
+namespace UnitTests
+{
+	constexpr size_t capacity = 50;
+
+	TEST_CLASS(pool)
+	{
+	public:
+		TEST_METHOD(test)
+		{
+			using worker_t = unique_ptr<int>;
+			using pool_t = stdex::pool<worker_t>;
+			pool_t pool;
+			list<thread> workers;
+			for (auto n = thread::hardware_concurrency(); n--; ) {
+				workers.push_back(std::move(thread([](_Inout_ pool_t& pool)
+					{
+						for (size_t n = 10000; n--; ) {
+							worker_t el = move(pool.pop());
+							if (!el)
+								el.reset(new int(1));
+							pool.push(move(el));
+						}
+					}, ref(pool))));
+			}
+
+			for (auto& w : workers)
+				w.join();
+		}
+	};
+}