initial revision of synergy. currently semi-supports X windows

on unix, but client screens don't simulate events other than
mouse move.  also not supporting clipboard at all yet and the
main app is just a temporary framework to test with.  must
clean up protocol and communication.

CEventQueue.cpp

@@ -0,0 +1,80 @@
+#include "CEventQueue.h"
+
+//
+// IEventQueue
+//
+
+IEventQueue*			IEventQueue::s_instance = NULL;
+
+IEventQueue::IEventQueue()
+{
+	assert(s_instance == NULL);
+	s_instance = this;
+}
+
+IEventQueue::~IEventQueue()
+{
+	s_instance = NULL;
+}
+
+IEventQueue*			IEventQueue::getInstance()
+{
+	return s_instance;
+}
+
+
+//
+// CEventQueue
+//
+
+CEventQueue::CEventQueue()
+{
+	// do nothing
+}
+
+CEventQueue::~CEventQueue()
+{
+	// do nothing
+}
+
+void					CEventQueue::pop(CEvent* event)
+{
+	assert(event != NULL);
+
+	// wait for an event
+	while (isEmpty())
+		wait(-1.0);
+
+	// lock the queue, extract an event, then unlock
+	lock();
+	*event = m_queue.front();
+	m_queue.pop_front();
+	unlock();
+}
+
+void					CEventQueue::push(const CEvent* event)
+{
+	// put the event at the end of the queue and signal that the queue
+	// is not empty
+	lock();
+	m_queue.push_back(*event);
+	signalNotEmpty();
+	unlock();
+}
+
+bool					CEventQueue::isEmpty()
+{
+	lock();
+	bool e = m_queue.empty();
+	unlock();
+
+	// if queue is empty then poll to see if more stuff is ready to go
+	// on the queue and check again if the queue is empty.
+	if (e) {
+		wait(0.0);
+		lock();
+		e = m_queue.empty();
+		unlock();
+	}
+	return e;
+}