Merge remote-tracking branch 'Kernel/master'

Kernel/include_std/mutex

@@ -0,0 +1,93 @@
+/*
+	This file is part of Fennix Kernel.
+
+	Fennix Kernel is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix Kernel 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 General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include <types.h>
+
+#include <task.hpp>
+#include <atomic>
+#include <vector>
+
+namespace std
+{
+	struct defer_lock_t
+	{
+		explicit defer_lock_t() = default;
+	};
+
+	struct try_to_lock_t
+	{
+		explicit try_to_lock_t() = default;
+	};
+	struct adopt_lock_t
+	{
+		explicit adopt_lock_t() = default;
+	};
+
+	/**
+	 * A mutex implementation.
+	 *
+	 * @note The TaskManager must be
+	 * initialized before using this class.
+	 */
+	class mutex
+	{
+	private:
+		atomic_bool Locked = false;
+		list<Tasking::TCB *> Waiting;
+		Tasking::TCB *Holder = nullptr;
+
+	public:
+		void lock();
+		bool try_lock();
+		void unlock();
+
+		mutex();
+		mutex(const mutex &) = delete;
+		~mutex();
+	};
+
+	template <class Mutex>
+	class lock_guard
+	{
+	private:
+		Mutex &mutexRef;
+
+	public:
+		explicit lock_guard(Mutex &m)
+			: mutexRef(m)
+		{
+			mutexRef.lock();
+		}
+
+		lock_guard(Mutex &m, adopt_lock_t t)
+			: mutexRef(m)
+		{
+			/* Do nothing */
+		}
+
+		lock_guard(const lock_guard &) = delete;
+
+		~lock_guard()
+		{
+			mutexRef.unlock();
+		}
+
+		lock_guard &operator=(const lock_guard &) = delete;
+	};
+}