1 files changed, 43 insertions, 0 deletions
diff --git a/dev/Kernel/KernelKit/Semaphore.hxx b/dev/Kernel/KernelKit/Semaphore.hxx
new file mode 100644
index 00000000..33dfe651
--- /dev/null
+++ b/dev/Kernel/KernelKit/Semaphore.hxx
@@ -0,0 +1,43 @@
+/* -------------------------------------------
+
+	Copyright ZKA Technologies.
+
+------------------------------------------- */
+
+#pragma once
+
+#include <NewKit/Defines.hxx>
+#include <KernelKit/Timer.hxx>
+#include <CompilerKit/CompilerKit.hxx>
+
+namespace Kernel
+{
+	class PROCESS_HEADER_BLOCK;
+
+	typedef PROCESS_HEADER_BLOCK* ProcessHeaderRef;
+
+	/// @brief Access control class, which locks a task until one is done.
+	class Semaphore final
+	{
+	public:
+		explicit Semaphore() = default;
+		~Semaphore()		 = default;
+
+	public:
+		bool IsLocked() const;
+		bool Unlock() noexcept;
+
+	public:
+		void WaitForProcess() noexcept;
+
+	public:
+		bool Lock(PROCESS_HEADER_BLOCK* process);
+		bool LockOrWait(PROCESS_HEADER_BLOCK* process, HardwareTimerInterface* timer);
+
+	public:
+		NEWOS_COPY_DEFAULT(Semaphore);
+
+	private:
+		ProcessHeaderRef fLockingProcess{nullptr};
+	};
+} // namespace Kernel