Merged in MHR-23 (pull request #12)

MHR-23: Merge work.

1 files changed, 64 insertions, 0 deletions

diff --git a/Kernel/KernelKit/LockDelegate.hpp b/Kernel/KernelKit/LockDelegate.hpp
new file mode 100644
index 00000000..56a2e17f
--- /dev/null
+++ b/Kernel/KernelKit/LockDelegate.hpp
@@ -0,0 +1,64 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+------------------------------------------- */
+
+#pragma once
+
+#include <NewKit/Atom.hpp>
+#include <NewKit/Defines.hpp>
+
+#define kLockDone	  (200U) /* job is done */
+#define kLockTimedOut (100U) /* job has timed out */
+
+namespace NewOS
+{
+	/// @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 NewOS