Add a disclaimer to ptable.h

diff --git a/ptable.h b/ptable.h
index 70d1b884dd3a36fcc65778a7753d918f595fd803..5cd5a90f374e3b43c389e14abe5ef2b4df950862 100644 (file)
--- a/ptable.h
+++ b/ptable.h
@@ -1,3 +1,11 @@
+/* This file is part of the Lexical-Types Perl module.
+ * See http://search.cpan.org/dist/Lexical-Types/ */
+
+/* This is a pointer table implementation essentially copied from the ptr_table
+ * implementation in perl's sv.c, except that it has been modified to use memory
+ * shared across threads.
+ * Copyright goes to the original authors, bug reports to me. */
+
 typedef struct ptable_ent {
  struct ptable_ent *next;
  const void *       key;