--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboctave/oct-mutex.h	Wed Jul 16 14:26:18 2008 -0400
@@ -0,0 +1,104 @@
+/*
+
+Copyright (C) 2008 Michael Goffioul
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+Octave 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.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, see
+<http://www.gnu.org/licenses/>.
+
+*/
+
+#if !defined (octave_octave_mutex_h)
+#define octave_octave_mutex_h 1
+
+class
+OCTAVE_API
+octave_mutex
+{
+public:
+    octave_mutex (void);
+
+    octave_mutex (const octave_mutex& m)
+      {
+	rep = m.rep;
+	rep->count++;
+      }
+
+    virtual ~octave_mutex (void)
+      {
+	if (rep && --rep->count == 0)
+	  {
+	    delete rep;
+	    rep = 0;
+	  }
+      }
+
+    octave_mutex& operator = (const octave_mutex& m)
+      {
+	if (rep != m.rep)
+	  {
+	    if (rep && --rep->count == 0)
+	      delete rep;
+
+	    rep = m.rep;
+	    rep->count++;
+	  }
+
+	return *this;
+      }
+
+    virtual void lock (void)
+      { rep->lock (); }
+
+    virtual void unlock (void)
+      { rep->unlock (); }
+
+protected:
+    explicit octave_mutex (int /* dummy */)
+	: count (0) { }
+
+protected:
+    union
+      {
+	octave_mutex *rep;
+	int count;
+      };
+};
+
+class
+octave_autolock
+{
+public:
+  octave_autolock (const octave_mutex& m)
+      : mutex (m)
+    {
+      mutex.lock ();
+    }
+
+  ~octave_autolock (void)
+    {
+      mutex.unlock ();
+    }
+
+private:
+  octave_autolock (void) { }
+  octave_autolock (const octave_autolock&) { }
+  octave_autolock& operator = (const octave_autolock&) { }
+
+private:
+  octave_mutex mutex;
+};
+
+#endif