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-------------------------------------------------------------------------------
--- --
--- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
--- --
--- SYSTEM.TASK_PRIMITIVES.OPERATIONS.DEC --
--- --
--- B o d y --
--- --
--- Copyright (C) 2000-2009, 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 3, 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. --
--- --
--- As a special exception under Section 7 of GPL version 3, you are granted --
--- additional permissions described in the GCC Runtime Library Exception, --
--- version 3.1, as published by the Free Software Foundation. --
--- --
--- You should have received a copy of the GNU General Public License and --
--- a copy of the GCC Runtime Library Exception along with this program; --
--- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
--- <http://www.gnu.org/licenses/>. --
--- --
--- GNARL was developed by the GNARL team at Florida State University. --
--- Extensive contributions were provided by Ada Core Technologies, Inc. --
--- --
-------------------------------------------------------------------------------
-
--- This package is for OpenVMS/Alpha
-
-with System.OS_Interface;
-with System.Parameters;
-with System.Tasking;
-with Ada.Unchecked_Conversion;
-with System.Soft_Links;
-
-package body System.Task_Primitives.Operations.DEC is
-
- use System.OS_Interface;
- use System.Parameters;
- use System.Tasking;
- use System.Aux_DEC;
- use type Interfaces.C.int;
-
- package SSL renames System.Soft_Links;
-
- -- The FAB_RAB_Type specifies 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
- Ada.Unchecked_Conversion (Task_Id, Unsigned_Longword);
-
- function To_Task_Id is new
- Ada.Unchecked_Conversion (Unsigned_Longword, Task_Id);
-
- function To_FAB_RAB is new
- Ada.Unchecked_Conversion (Address, FAB_RAB_Access_Type);
-
- ---------------------------
- -- Interrupt_AST_Handler --
- ---------------------------
-
- procedure Interrupt_AST_Handler (ID : Address) is
- Result : Interfaces.C.int;
- AST_Self_ID : constant 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 : constant 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 : constant 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 : constant 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 : constant Task_Id := Self;
-
- begin
- if Single_Lock then
- Lock_RTS;
- else
- Write_Lock (Synch_Self_ID);
- end if;
-
- SSL.Abort_Defer.all;
- 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;
-
- if Single_Lock then
- Unlock_RTS;
- else
- Unlock (Synch_Self_ID);
- end if;
-
- SSL.Abort_Undefer.all;
- end Task_Synch;
-
-end System.Task_Primitives.Operations.DEC;