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

pglablib/WaitHandleList.cpp

@@ -0,0 +1,31 @@
+#include "WaitHandleList.h"
+#include "win32event.h"
+
+WaitHandleList::WaitHandleList() = default;
+WaitHandleList::~WaitHandleList() = default;
+
+WaitResultValue WaitHandleList::add(HANDLE h)
+{
+	m_waitHandles.push_back(h);
+	return WAIT_OBJECT_0 + static_cast<DWORD>(m_waitHandles.size() - 1);
+}
+
+WaitResultValue WaitHandleList::add(Win32Event &e)
+{
+	return add(e.handle());
+}
+
+DWORD WaitHandleList::count() const
+{
+	return static_cast<DWORD>(m_waitHandles.size());
+}
+
+void WaitHandleList::clear()
+{
+	m_waitHandles.clear();
+}
+
+WaitHandleList::operator const HANDLE*() const
+{
+	return m_waitHandles.data();
+}