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/pbd/dmalloc.cc

@@ -0,0 +1,102 @@
+/*
+ * file that facilitates C++ program debugging.
+ *
+ * Copyright 1995 by Gray Watson
+ *
+ * This file is part of the dmalloc package.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * NON-COMMERCIAL purpose and without fee is hereby granted, provided
+ * that the above copyright notice and this permission notice appear
+ * in all copies, and that the name of Gray Watson not be used in
+ * advertising or publicity pertaining to distribution of the document
+ * or software without specific, written prior permission.
+ *
+ * Please see the PERMISSIONS file or contact the author for information
+ * about commercial licenses.
+ *
+ * Gray Watson makes no representations about the suitability of the
+ * software described herein for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ *
+ * The author may be contacted via http://www.letters.com/~gray/
+ *
+ * $Id$
+ */
+
+/*
+ * This file is used to effectively redirect new to the more familiar
+ * malloc and delete to the more familiar free so they can be debugged
+ * with the debug malloc library..  They also give the known error
+ * behavior, too.
+ *
+ * Compile and link this in with the C++ program you want to debug.
+ *
+ * NOTE: I am not a C++ hacker so feedback in the form of other hints
+ * and ideas for C++ users would be much appreciated.
+ */
+
+#ifdef DEBUG_MALLOC
+
+extern "C" {
+#include <stdlib.h>
+#include <dmalloc.h>
+#include "/usr/local/src/dmalloc-4.1.2/return.h"
+}
+
+/*
+ * An overload function for the C++ new.
+ */
+void *
+operator new(size_t size)
+{
+  char	*file;
+  GET_RET_ADDR(file);
+
+  /* handle correct C++ semantics for an alloc of size 0 */
+  
+  if (size == 0) size = 1;
+  
+  return _malloc_leap(file, 0, size);
+}
+
+/*
+ * An overload function for the C++ new[].
+ */
+void *
+operator new[](size_t size)
+{
+  char	*file;
+  GET_RET_ADDR(file);
+
+  /* handle correct C++ semantics for an alloc of size 0 */
+  
+  if (size == 0) size = 1;
+
+  return _malloc_leap(file, 0, size);
+}
+
+/*
+ * An overload function for the C++ delete.
+ */
+void
+operator delete(void *pnt)
+{
+  char	*file;
+  GET_RET_ADDR(file);
+  _free_leap(file, 0, pnt);
+}
+
+/*
+ * An overload function for the C++ delete[].  Thanks to Jens Krinke
+ * <j.krinke@gmx.de>
+ */
+void
+operator delete[](void *pnt)
+{
+  char	*file;
+  GET_RET_ADDR(file);
+  _free_leap(file, 0, pnt);
+}
+
+#endif