Initial commit of the synergy trunk sources from sf.net

lib/base/CStopwatch.cpp

@@ -0,0 +1,126 @@
+/*
+ * synergy -- mouse and keyboard sharing utility
+ * Copyright (C) 2002 Chris Schoeneman
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file COPYING that should have accompanied this file.
+ * 
+ * This package is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "CStopwatch.h"
+#include "CArch.h"
+
+//
+// CStopwatch
+//
+
+CStopwatch::CStopwatch(bool triggered) :
+	m_mark(0.0),
+	m_triggered(triggered),
+	m_stopped(triggered)
+{
+	if (!triggered) {
+		m_mark = ARCH->time();
+	}
+}
+
+CStopwatch::~CStopwatch()
+{
+	// do nothing
+}
+
+double
+CStopwatch::reset()
+{
+	if (m_stopped) {
+		const double dt = m_mark;
+		m_mark = 0.0;
+		return dt;
+	}
+	else {
+		const double t	= ARCH->time();
+		const double dt = t - m_mark;
+		m_mark = t;
+		return dt;
+	}
+}
+
+void
+CStopwatch::stop()
+{
+	if (m_stopped) {
+		return;
+	}
+
+	// save the elapsed time
+	m_mark	  = ARCH->time() - m_mark;
+	m_stopped = true;
+}
+
+void
+CStopwatch::start()
+{
+	m_triggered = false;
+	if (!m_stopped) {
+		return;
+	}
+
+	// set the mark such that it reports the time elapsed at stop()
+	m_mark	  = ARCH->time() - m_mark;
+	m_stopped = false;
+}
+
+void
+CStopwatch::setTrigger()
+{
+	stop();
+	m_triggered = true;
+}
+
+double
+CStopwatch::getTime()
+{
+	if (m_triggered) {
+		const double dt = m_mark;
+		start();
+		return dt;
+	}
+	else if (m_stopped) {
+		return m_mark;
+	}
+	else {
+		return ARCH->time() - m_mark;
+	}
+}
+
+CStopwatch::operator double()
+{
+	return getTime();
+}
+
+bool
+CStopwatch::isStopped() const
+{
+	return m_stopped;
+}
+
+double
+CStopwatch::getTime() const
+{
+	if (m_stopped) {
+		return m_mark;
+	}
+	else {
+		return ARCH->time() - m_mark;
+	}
+}
+
+CStopwatch::operator double() const
+{
+	return getTime();
+}