Add all the files

src/util/helpers/fspinlock.h

@@ -0,0 +1,38 @@
+#pragma once
+
+// minimal but efficient non-recursive spinlock implementation
+
+#include <atomic>
+
+class FSpinlock
+{
+public:
+	void acquire()
+	{
+		while( true )
+		{
+			if (!m_lockBool.exchange(true, std::memory_order_acquire)) 
+				break;
+			while (m_lockBool.load(std::memory_order_relaxed)) _mm_pause();
+		}
+	}
+
+	bool tryAcquire()
+	{
+		return !m_lockBool.exchange(true, std::memory_order_acquire);
+	}
+
+	void release()
+	{
+		m_lockBool.store(false, std::memory_order_release);
+	}
+
+	bool isHolding() const
+	{
+		return m_lockBool.load(std::memory_order_relaxed);
+	}
+
+private:
+	
+	std::atomic<bool> m_lockBool = false;
+};