Squash merge of the threaded UM hash table construction feature.

Conflicts:
	oam/etc/Columnstore.xml.singleserver

utils/common/spinlock.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <atomic>
+
+namespace utils
+{
+
+inline void getSpinlock(std::atomic<bool> &lock)
+{
+    bool _false = false;
+    while (!lock.compare_exchange_weak(_false, true, std::memory_order_acquire))
+        _false = false;
+}
+
+inline bool trySpinlock(std::atomic<bool> &lock)
+{
+    bool _false = false;
+    bool ret = lock.compare_exchange_weak(_false, true, std::memory_order_acquire);
+    return ret;
+}
+
+inline void releaseSpinlock(std::atomic<bool> &lock)
+{
+    lock.store(false, std::memory_order_release);
+}
+
+}