rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/glibmm2/glib/glibmm/timeval.h

@@ -0,0 +1,233 @@
+// -*- c++ -*-
+#ifndef _GLIBMM_TIMEVAL_H
+#define _GLIBMM_TIMEVAL_H
+
+/* $Id: timeval.h 2 2003-01-07 16:59:16Z murrayc $ */
+
+/* timeval.h
+ *
+ * Copyright (C) 2002 The gtkmm Development Team
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <glib/gtypes.h>
+#include <glib/gtimer.h>
+
+namespace Glib
+{
+
+/** Glib::TimeVal is a wrapper around the glib structure GTimeVal.
+ * The glib structure GTimeVal itself is equivalent to struct timeval,
+ * which is returned by the gettimeofday() UNIX call. Additionally
+ * this wrapper provides an assortment of time manipulation functions.
+ */
+struct TimeVal : public GTimeVal
+{
+  inline TimeVal();
+  inline TimeVal(long seconds, long microseconds);
+
+  inline TimeVal(const GTimeVal& gtimeval);
+  inline TimeVal& operator=(const GTimeVal& gtimeval);
+
+  /** Assigns the current time to the TimeVal instance.
+   * Equivalent to the UNIX gettimeofday() function, but is portable and 
+   * works also on Win32. 
+   */
+  void assign_current_time();
+
+  void add(const TimeVal& rhs);
+  void subtract(const TimeVal& rhs);
+  void add_seconds(long seconds);
+  void subtract_seconds(long seconds);
+  void add_milliseconds(long milliseconds);
+  void subtract_milliseconds(long milliseconds);
+  void add_microseconds(long microseconds);
+  void subtract_microseconds(long microseconds);
+
+  inline TimeVal& operator+=(const TimeVal& gtimeval);
+  inline TimeVal& operator-=(const TimeVal& gtimeval);
+  inline TimeVal& operator+=(long seconds);
+  inline TimeVal& operator-=(long seconds);
+
+  /** Returns a double representation of the time interval.
+   * This member function converts the time interval, that is
+   * internally stored as two long values for seconds and microseconds,
+   * to a double representation, whose unit is seconds.
+   */
+  inline double as_double() const;
+
+  inline bool negative() const;
+
+  /** Checks whether the stored time interval is positive.
+   * Returns true if the stored time / time interval is positive.
+   */
+  inline bool valid() const;
+};
+
+inline
+TimeVal::TimeVal()
+{
+  tv_sec  = 0;
+  tv_usec = 0;
+}
+
+inline
+TimeVal::TimeVal(long seconds, long microseconds)
+{
+  tv_sec  = seconds;
+  tv_usec = microseconds;
+}
+
+inline
+TimeVal::TimeVal(const GTimeVal& gtimeval)
+{
+  tv_sec  = gtimeval.tv_sec;
+  tv_usec = gtimeval.tv_usec;
+}
+
+inline
+TimeVal& TimeVal::operator=(const GTimeVal& gtimeval)
+{
+  tv_sec  = gtimeval.tv_sec;
+  tv_usec = gtimeval.tv_usec;
+  return *this;
+}
+
+inline
+TimeVal& TimeVal::operator+=(const TimeVal& gtimeval)
+{
+  add(gtimeval);
+
+  return *this;
+}
+
+inline
+TimeVal& TimeVal::operator-=(const TimeVal& gtimeval)
+{
+  subtract(gtimeval);
+
+  return *this;
+}
+
+inline
+TimeVal& TimeVal::operator+=(long seconds)
+{
+  add_seconds(seconds);
+
+  return *this;
+}
+
+inline
+TimeVal& TimeVal::operator-=(long seconds)
+{
+  subtract_seconds(seconds);
+
+  return *this;
+}
+
+inline
+double TimeVal::as_double() const
+{
+  return tv_sec + ((double) tv_usec / (double) G_USEC_PER_SEC);
+}
+
+inline
+bool TimeVal::negative() const
+{
+  return (tv_sec < 0);
+}
+
+inline
+bool TimeVal::valid() const
+{
+  return (tv_usec >= 0 && tv_usec < G_USEC_PER_SEC);
+}
+
+/** @relates Glib::TimeVal */
+inline
+TimeVal operator+(const TimeVal& lhs, const TimeVal& rhs)
+{ return TimeVal(lhs) += rhs; }
+
+/** @relates Glib::TimeVal */
+inline 
+TimeVal operator+(const TimeVal& lhs, long seconds)
+{ return TimeVal(lhs) += seconds; }
+
+/** @relates Glib::TimeVal */
+inline 
+TimeVal operator-(const TimeVal& lhs, const TimeVal& rhs)
+{ return TimeVal(lhs) -= rhs; }
+
+/** @relates Glib::TimeVal */
+inline 
+TimeVal operator-(const TimeVal& lhs, long seconds)
+{ return TimeVal(lhs) -= seconds; }
+
+
+/** @relates Glib::TimeVal */
+inline
+bool operator==(const TimeVal& lhs, const TimeVal& rhs)
+{
+  return (lhs.tv_sec == rhs.tv_sec && lhs.tv_usec == rhs.tv_usec);
+}
+
+/** @relates Glib::TimeVal */
+inline
+bool operator!=(const TimeVal& lhs, const TimeVal& rhs)
+{
+  return (lhs.tv_sec != rhs.tv_sec || lhs.tv_usec != rhs.tv_usec);
+}
+
+/** @relates Glib::TimeVal */
+inline
+bool operator<(const TimeVal& lhs, const TimeVal& rhs)
+{
+  return ((lhs.tv_sec < rhs.tv_sec) ||
+          (lhs.tv_sec == rhs.tv_sec && lhs.tv_usec < rhs.tv_usec));
+}
+
+/** @relates Glib::TimeVal */
+inline
+bool operator>(const TimeVal& lhs, const TimeVal& rhs)
+{
+  return ((lhs.tv_sec > rhs.tv_sec) ||
+          (lhs.tv_sec == rhs.tv_sec && lhs.tv_usec > rhs.tv_usec));
+}
+
+/** @relates Glib::TimeVal */
+inline
+bool operator<=(const TimeVal& lhs, const TimeVal& rhs)
+{
+  return ((lhs.tv_sec < rhs.tv_sec) ||
+          (lhs.tv_sec == rhs.tv_sec && lhs.tv_usec <= rhs.tv_usec));
+}
+
+/** @relates Glib::TimeVal */
+inline
+bool operator>=(const TimeVal& lhs, const TimeVal& rhs)
+{
+  return ((lhs.tv_sec > rhs.tv_sec) ||
+          (lhs.tv_sec == rhs.tv_sec && lhs.tv_usec >= rhs.tv_usec));
+}
+
+} // namespace Glib
+
+
+#endif /* _GLIBMM_TIMEVAL_H */
+
+
+
+