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1 files changed, 107 insertions, 0 deletions

diff --git a/gcc/ada/a-caldel-vms.adb b/gcc/ada/a-caldel-vms.adb
new file mode 100644
index 000000000..128918a9a
--- /dev/null
+++ b/gcc/ada/a-caldel-vms.adb
@@ -0,0 +1,107 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
+--                                                                          --
+--                   A D A . C A L E N D A R . D E L A Y S                  --
+--                                                                          --
+--                                  B o d y                                 --
+--                                                                          --
+--             Copyright (C) 1991-1994, Florida State University            --
+--                     Copyright (C) 1995-2009, AdaCore                     --
+--                                                                          --
+-- GNARL is free software; you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
+-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
+-- OUT 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  distributed with GNARL; see file COPYING.  If not, write --
+-- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
+-- Boston, MA 02110-1301, USA.                                              --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- GNARL was developed by the GNARL team at Florida State University.       --
+-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This is the Alpha/VMS version
+
+with System.OS_Primitives;
+with System.Soft_Links;
+
+package body Ada.Calendar.Delays is
+
+   package OSP renames System.OS_Primitives;
+   package TSL renames System.Soft_Links;
+
+   use type TSL.Timed_Delay_Call;
+
+   -----------------------
+   -- Local Subprograms --
+   -----------------------
+
+   procedure Timed_Delay_NT (Time : Duration; Mode : Integer);
+   --  Timed delay procedure used when no tasking is active
+
+   ---------------
+   -- Delay_For --
+   ---------------
+
+   procedure Delay_For (D : Duration) is
+   begin
+      TSL.Timed_Delay.all
+        (Duration'Min (D, OSP.Max_Sensible_Delay), OSP.Relative);
+   end Delay_For;
+
+   -----------------
+   -- Delay_Until --
+   -----------------
+
+   procedure Delay_Until (T : Time) is
+   begin
+      TSL.Timed_Delay.all (To_Duration (T), OSP.Absolute_Calendar);
+   end Delay_Until;
+
+   -----------------
+   -- To_Duration --
+   -----------------
+
+   function To_Duration (T : Time) return Duration is
+      Safe_Ada_High : constant Time := Time_Of (2250, 1, 1, 0.0);
+      --  A value distant enough to emulate "end of time" but which does not
+      --  cause overflow.
+
+      Safe_T : constant Time :=
+                 (if T > Safe_Ada_High then Safe_Ada_High else T);
+
+   begin
+      return OSP.To_Duration (OSP.OS_Time (Safe_T), OSP.Absolute_Calendar);
+   end To_Duration;
+
+   --------------------
+   -- Timed_Delay_NT --
+   --------------------
+
+   procedure Timed_Delay_NT (Time : Duration; Mode : Integer) is
+   begin
+      OSP.Timed_Delay (Time, Mode);
+   end Timed_Delay_NT;
+
+begin
+   --  Set up the Timed_Delay soft link to the non tasking version if it has
+   --  not been already set. If tasking is present, Timed_Delay has already set
+   --  this soft link, or this will be overridden during the elaboration of
+   --  System.Tasking.Initialization
+
+   if TSL.Timed_Delay = null then
+      TSL.Timed_Delay := Timed_Delay_NT'Access;
+   end if;
+end Ada.Calendar.Delays;