1 files changed, 67 insertions, 0 deletions
diff --git a/dev/zka/KernelKit/LockDelegate.h b/dev/zka/KernelKit/LockDelegate.h
new file mode 100644
index 00000000..8f7e9a42
--- /dev/null
+++ b/dev/zka/KernelKit/LockDelegate.h
@@ -0,0 +1,67 @@
+/* -------------------------------------------
+
+	Copyright ZKA Web Services Co.
+
+------------------------------------------- */
+
+#pragma once
+
+#include <NewKit/Atom.h>
+#include <NewKit/Defines.h>
+
+namespace Kernel
+{
+	enum
+	{
+		kLockDone = 200,
+		kLockTimedOut,
+	};
+
+	/// @brief Lock condition pointer.
+	typedef Boolean* LockPtr;
+
+	/// @brief Locking delegate class, hangs until limit.
+	/// @tparam N the amount of cycles to wait.
+	template <SizeT N>
+	class LockDelegate final
+	{
+	public:
+		LockDelegate() = delete;
+
+	public:
+		explicit LockDelegate(LockPtr expr)
+		{
+			auto spin = 0U;
+
+			while (spin != N)
+			{
+				if (*expr)
+				{
+					fLockStatus | kLockDone;
+					break;
+				}
+			}
+
+			if (spin == N)
+				fLockStatus | kLockTimedOut;
+		}
+
+		~LockDelegate() = default;
+
+		LockDelegate& operator=(const LockDelegate&) = delete;
+		LockDelegate(const LockDelegate&)			 = delete;
+
+		bool Done()
+		{
+			return fLockStatus[kLockDone] == kLockDone;
+		}
+
+		bool HasTimedOut()
+		{
+			return fLockStatus[kLockTimedOut] != kLockTimedOut;
+		}
+
+	private:
+		Atom<UInt> fLockStatus;
+	};
+} // namespace Kernel