1 files changed, 77 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-93/ashenden/compliant/ch_19_tkfifo-b.vhd b/testsuite/vests/vhdl-93/ashenden/compliant/ch_19_tkfifo-b.vhd
new file mode 100644
index 000000000..5c00f14c7
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+++ b/testsuite/vests/vhdl-93/ashenden/compliant/ch_19_tkfifo-b.vhd
@@ -0,0 +1,77 @@
+
+-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs 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 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs 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 VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+-- ---------------------------------------------------------------------
+--
+-- $Id: ch_19_tkfifo-b.vhd,v 1.3 2001-10-26 16:29:36 paw Exp $
+-- $Revision: 1.3 $
+--
+-- ---------------------------------------------------------------------
+
+package body token_fifo_adt is
+
+  function new_fifo return fifo_type is
+  begin
+    return new fifo_record'( null, null );
+  end function new_fifo;
+
+
+  procedure test_empty ( variable fifo : in fifo_type;
+                         variable is_empty : out boolean ) is
+  begin
+    is_empty := fifo.head_entry = null;
+  end procedure test_empty;
+
+
+  procedure insert ( fifo : inout fifo_type;
+                     element : in element_type ) is
+
+    variable new_entry : fifo_entry
+      := new fifo_entry_record'( next_entry => null,
+                                 element => element );
+  begin
+    if fifo.tail_entry /= null then
+      fifo.tail_entry.next_entry := new_entry;
+    else
+      fifo.head_entry := new_entry;
+    end if;
+    fifo.tail_entry := new_entry;
+  end procedure insert;
+
+
+  procedure remove ( fifo : inout fifo_type;
+                     element : out element_type ) is
+    variable empty_fifo : boolean;
+    variable removed_entry : fifo_entry;
+  begin
+    test_empty(fifo, empty_fifo);
+    if empty_fifo then
+      report "remove from empty fifo" severity failure;
+    else
+      removed_entry := fifo.head_entry;
+      element := removed_entry.element;
+      fifo.head_entry := removed_entry.next_entry;
+      if fifo.head_entry = null then  -- fifo now empty
+        fifo.tail_entry := null;
+      end if;
+      deallocate(removed_entry);
+    end if;
+  end procedure remove;
+
+end package body token_fifo_adt;