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Crafter.Thread-ThreadPool.cppm

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+/*
+Crafter.Thread
+Copyright (C) 2025 Catcrafts
+Catcrafts.net
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 3.0 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+*/
+
+module;
+
+#include <vector>
+#include <functional>
+#include <atomic>
+#include <thread>
+#include <condition_variable>
+
+export module Crafter.Thread:ThreadPool;
+
+namespace Crafter::Thread {
+	struct ThreadStorage {
+		std::vector<std::function<void(void)>> tasks;
+		std::vector<std::function<void(void)>> buffer;
+		std::condition_variable cv;
+		std::mutex mutex;
+		std::atomic<unsigned int> taskCount;
+		std::thread thread;
+	};
+
+	export class ThreadPool {
+	public:
+		static inline std::atomic<bool> stopped;
+		static void Start(int maxThreads = -1);
+		static void Stop();
+		static void Enqueue(std::function<void(void)> task);
+		static void Enqueue(std::vector<std::function<void(void)>> tasks);
+		static void JoinPool();
+		static inline unsigned int threadCount;
+		static inline std::atomic<unsigned int> activeThreads;
+	private:
+		static inline std::unordered_map<std::thread::id, ThreadStorage*> threadIdMap;
+		static inline ThreadStorage* threadStorage;
+		static void WaitAndExecuteTask(ThreadStorage* threadStorage);
+	};
+}