New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45953 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 132 insertions, 0 deletions

diff --git a/gcc/ada/a-sytaco.adb b/gcc/ada/a-sytaco.adb
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUNTIME COMPONENTS                          --
+--                                                                          --
+--         A D A . S Y N C H R O N O U S _ T A S K _ C O N T R O L          --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                            $Revision: 1.9 $
+--                                                                          --
+--            Copyright (C) 1992-2001 Free Software Foundation, Inc.        --
+--                                                                          --
+-- GNAT 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.  GNAT 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 GNAT;  see file COPYING.  If not, write --
+-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, 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.                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+
+package body Ada.Synchronous_Task_Control is
+
+   -------------------
+   -- Suspension_PO --
+   -------------------
+
+   protected body Suspension_Object is
+
+      --------------
+      -- Get_Open --
+      --------------
+
+      function Get_Open return Boolean is
+      begin
+         return Open;
+      end Get_Open;
+
+      ---------------
+      -- Set_False --
+      ---------------
+
+      procedure Set_False is
+      begin
+         Open := False;
+      end Set_False;
+
+      --------------
+      -- Set_True --
+      --------------
+
+      procedure Set_True is
+      begin
+         Open := True;
+      end Set_True;
+
+      ----------
+      -- Wait --
+      ----------
+
+      entry Wait when Open is
+      begin
+         Open := False;
+      end Wait;
+
+      --------------------
+      -- Wait_Exception --
+      --------------------
+
+      entry Wait_Exception when True is
+      begin
+         if Wait'Count /= 0 then
+            raise Program_Error;
+         end if;
+
+         requeue Wait;
+      end Wait_Exception;
+
+   end Suspension_Object;
+
+   -------------------
+   -- Current_State --
+   -------------------
+
+   function Current_State (S : Suspension_Object) return Boolean is
+   begin
+      return S.Get_Open;
+   end Current_State;
+
+   ---------------
+   -- Set_False --
+   ---------------
+
+   procedure Set_False (S : in out Suspension_Object) is
+   begin
+      S.Set_False;
+   end Set_False;
+
+   --------------
+   -- Set_True --
+   --------------
+
+   procedure Set_True (S : in out Suspension_Object) is
+   begin
+      S.Set_True;
+   end Set_True;
+
+   ------------------------
+   -- Suspend_Until_True --
+   ------------------------
+
+   procedure Suspend_Until_True (S : in out Suspension_Object) is
+   begin
+      S.Wait_Exception;
+   end Suspend_Until_True;
+
+end Ada.Synchronous_Task_Control;