Switched away from boost::asio as it doesn't play well with libpq

pglablib/WaitHandleList.h

@@ -0,0 +1,26 @@
+#ifndef WAITHANDLELIST_H
+#define WAITHANDLELIST_H
+
+#include <windows.h>
+#include <vector>
+
+class Win32Event;
+
+using WaitResultValue = DWORD;
+
+class WaitHandleList {
+public:
+	WaitHandleList();
+	~WaitHandleList();
+
+	WaitResultValue add(HANDLE h);
+	WaitResultValue add(Win32Event &e);
+	DWORD count() const;
+	void clear();
+	operator const HANDLE*() const;
+
+private:
+	std::vector<HANDLE> m_waitHandles;
+};
+
+#endif // WAITHANDLELIST_H