New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45952 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 144 insertions, 0 deletions

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+------------------------------------------------------------------------------
+--                                                                          --
+--                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
+--                                                                          --
+--    S Y S T E M . T A S K _ P R I M I T I V E S . O P E R A T I O N S     --
+--                                 . D E C                                  --
+--                                                                          --
+--                                  B o d y                                 --
+--                                                                          --
+--                             $Revision: 1.1 $                             --
+--                                                                          --
+--              Copyright (C) 2000 Free Software Foundation, Inc.           --
+--                                                                          --
+-- 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,  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.                                      --
+--                                                                          --
+-- GNARL was developed by the GNARL team at Florida State University. It is --
+-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
+-- State University (http://www.gnat.com).                                  --
+--                                                                          --
+------------------------------------------------------------------------------
+--   This package is for OpenVMS/Alpha
+--
+with System.OS_Interface;
+with System.Tasking;
+with Unchecked_Conversion;
+package body System.Task_Primitives.Operations.DEC is
+
+   use System.OS_Interface;
+   use System.Tasking;
+   use System.Aux_DEC;
+   use type Interfaces.C.int;
+
+   --  The FAB_RAB_Type specifieds where the context field (the calling
+   --  task) is stored.  Other fields defined for FAB_RAB arent' need and
+   --  so are ignored.
+   type FAB_RAB_Type is
+   record
+      CTX : Unsigned_Longword;
+   end record;
+
+   for FAB_RAB_Type use
+   record
+      CTX at 24 range 0 .. 31;
+   end record;
+
+   for FAB_RAB_Type'Size use 224;
+
+   type FAB_RAB_Access_Type is access all FAB_RAB_Type;
+
+   -----------------------
+   -- Local Subprograms --
+   -----------------------
+
+   function To_Unsigned_Longword is new
+     Unchecked_Conversion (Task_ID, Unsigned_Longword);
+
+   function To_Task_Id is new
+     Unchecked_Conversion (Unsigned_Longword, Task_ID);
+
+   function To_FAB_RAB is new
+     Unchecked_Conversion (Address, FAB_RAB_Access_Type);
+
+   ---------------------------
+   -- Interrupt_AST_Handler --
+   ---------------------------
+
+   procedure Interrupt_AST_Handler (ID : Address) is
+      Result     : Interfaces.C.int;
+      AST_Self_ID    : Task_ID := To_Task_Id (ID);
+   begin
+      Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access);
+      pragma Assert (Result = 0);
+   end Interrupt_AST_Handler;
+
+   ---------------------
+   -- RMS_AST_Handler --
+   ---------------------
+
+   procedure RMS_AST_Handler (ID : Address) is
+      AST_Self_ID    : Task_ID := To_Task_Id (To_FAB_RAB (ID).CTX);
+      Result     : Interfaces.C.int;
+   begin
+      AST_Self_ID.Common.LL.AST_Pending := False;
+      Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access);
+      pragma Assert (Result = 0);
+   end RMS_AST_Handler;
+
+   ----------
+   -- Self --
+   ----------
+
+   function Self return Unsigned_Longword is
+      Self_ID : Task_ID := Self;
+   begin
+      Self_ID.Common.LL.AST_Pending := True;
+      return To_Unsigned_Longword (Self);
+   end Self;
+
+   -------------------------
+   -- Starlet_AST_Handler --
+   -------------------------
+
+   procedure Starlet_AST_Handler (ID : Address) is
+      Result     : Interfaces.C.int;
+      AST_Self_ID    : Task_ID := To_Task_Id (ID);
+   begin
+      AST_Self_ID.Common.LL.AST_Pending := False;
+      Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access);
+      pragma Assert (Result = 0);
+   end Starlet_AST_Handler;
+
+   ----------------
+   -- Task_Synch --
+   ----------------
+
+   procedure Task_Synch is
+      Synch_Self_ID : Task_ID := Self;
+   begin
+      Write_Lock (Synch_Self_ID);
+      Synch_Self_ID.Common.State := AST_Server_Sleep;
+      while Synch_Self_ID.Common.LL.AST_Pending loop
+         Sleep (Synch_Self_ID, AST_Server_Sleep);
+      end loop;
+      Synch_Self_ID.Common.State := Runnable;
+      Unlock (Synch_Self_ID);
+   end Task_Synch;
+
+end System.Task_Primitives.Operations.DEC;