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.

CUnixEventQueue.cpp

@@ -0,0 +1,141 @@
+#include "CUnixEventQueue.h"
+#include "IJob.h"
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+//
+// CUnixEventQueue
+//
+
+CUnixEventQueue::CUnixEventQueue()
+{
+	// do nothing
+}
+
+CUnixEventQueue::~CUnixEventQueue()
+{
+	// clean up lists
+	clearList(m_readList);
+	clearList(m_writeList);
+}
+
+void					CUnixEventQueue::addFileDesc(int fd,
+								IJob* readJob, IJob* writeJob)
+{
+	assert(fd != -1);
+	assert(m_readList.count(fd) == 0 && m_writeList.count(fd) == 0);
+	assert(readJob != writeJob || readJob == NULL);
+
+	if (readJob)
+		m_readList[fd] = readJob;
+	if (writeJob)
+		m_writeList[fd] = writeJob;
+}
+
+void					CUnixEventQueue::removeFileDesc(int fd)
+{
+	assert(fd != -1);
+
+	// remove from lists
+	eraseList(m_readList, fd);
+	eraseList(m_writeList, fd);
+}
+
+void					CUnixEventQueue::wait(double timeout)
+{
+	// prepare sets
+	fd_set fdRead, fdWrite;
+	const int maxRead  = prepList(m_readList,  &fdRead);
+	const int maxWrite = prepList(m_writeList, &fdWrite);
+
+	// compute the larger of maxRead and maxWrite
+	const int fdMax = (maxRead > maxWrite) ? maxRead : maxWrite;
+	if (fdMax == -1)
+		return;
+
+	// prepare timeout
+	struct timeval* pTimeout = NULL;
+	struct timeval  sTimeout;
+	if (timeout >= 0.0) {
+		sTimeout.tv_sec  = static_cast<int>(timeout);
+		sTimeout.tv_usec = static_cast<int>(1000000.0 *
+								(timeout - sTimeout.tv_sec));
+		pTimeout = &sTimeout;
+	}
+
+	// wait
+	const int n = ::select(fdMax + 1, &fdRead, &fdWrite, NULL, pTimeout);
+
+	// return on error or if nothing to do
+	if (n <= 0)
+		return;
+
+	// invoke jobs
+	// note -- calling removeFileDesc() from a job is likely to crash the
+	// program because we expect all jobs with active file descriptors to
+	// persist for the duration of these loops.
+	int fd;
+	for (fd = 0; fd <= maxRead; ++fd)
+		if (FD_ISSET(fd, &fdRead)) {
+			assert(m_readList.count(fd) > 0);
+			assert(m_readList[fd] != NULL);
+			m_readList[fd]->run();
+		}
+	for (fd = 0; fd <= maxWrite; ++fd)
+		if (FD_ISSET(fd, &fdWrite)) {
+			assert(m_writeList.count(fd) > 0);
+			assert(m_writeList[fd] != NULL);
+			m_writeList[fd]->run();
+		}
+}
+
+void					CUnixEventQueue::lock()
+{
+	// do nothing
+}
+
+void					CUnixEventQueue::unlock()
+{
+	// do nothing
+}
+
+void					CUnixEventQueue::signalNotEmpty()
+{
+	// do nothing
+}
+
+void					CUnixEventQueue::eraseList(List& list, int fd) const
+{
+	List::iterator index = list.find(fd);
+	if (index != list.end()) {
+		delete index->second;
+		list.erase(index);
+	}
+}
+
+void					CUnixEventQueue::clearList(List& list) const
+{
+	for (List::const_iterator index = list.begin();
+								index != list.end(); ++index)
+		delete index->second;
+	list.clear();
+}
+
+int					CUnixEventQueue::prepList(
+								const List& list, void* vfdSet) const
+{
+	fd_set* fdSet = reinterpret_cast<fd_set*>(vfdSet);
+	FD_ZERO(fdSet);
+
+	int fdMax = -1;
+	for (List::const_iterator index = list.begin();
+								index != list.end(); ++index) {
+		const int fd = index->first;
+		FD_SET(fd, fdSet);
+		if (fd > fdMax)
+			fdMax = fd;
+	}
+
+	return fdMax;
+}