162 lines
5.6 KiB
Ada
162 lines
5.6 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- SYSTEM.TASK_PRIMITIVES.OPERATIONS.DEC --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2000-2009, Free Software Foundation, Inc. --
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-- --
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-- GNARL is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies, Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package is for OpenVMS/Alpha
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with System.OS_Interface;
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with System.Parameters;
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with System.Tasking;
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with Ada.Unchecked_Conversion;
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with System.Soft_Links;
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package body System.Task_Primitives.Operations.DEC is
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use System.OS_Interface;
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use System.Parameters;
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use System.Tasking;
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use System.Aux_DEC;
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use type Interfaces.C.int;
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package SSL renames System.Soft_Links;
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-- The FAB_RAB_Type specifies where the context field (the calling
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-- task) is stored. Other fields defined for FAB_RAB arent' need and
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-- so are ignored.
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type FAB_RAB_Type is record
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CTX : Unsigned_Longword;
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end record;
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for FAB_RAB_Type use record
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CTX at 24 range 0 .. 31;
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end record;
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for FAB_RAB_Type'Size use 224;
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type FAB_RAB_Access_Type is access all FAB_RAB_Type;
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-----------------------
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-- Local Subprograms --
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-----------------------
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function To_Unsigned_Longword is new
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Ada.Unchecked_Conversion (Task_Id, Unsigned_Longword);
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function To_Task_Id is new
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Ada.Unchecked_Conversion (Unsigned_Longword, Task_Id);
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function To_FAB_RAB is new
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Ada.Unchecked_Conversion (Address, FAB_RAB_Access_Type);
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---------------------------
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-- Interrupt_AST_Handler --
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---------------------------
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procedure Interrupt_AST_Handler (ID : Address) is
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Result : Interfaces.C.int;
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AST_Self_ID : constant Task_Id := To_Task_Id (ID);
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begin
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Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access);
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pragma Assert (Result = 0);
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end Interrupt_AST_Handler;
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---------------------
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-- RMS_AST_Handler --
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---------------------
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procedure RMS_AST_Handler (ID : Address) is
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AST_Self_ID : constant Task_Id := To_Task_Id (To_FAB_RAB (ID).CTX);
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Result : Interfaces.C.int;
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begin
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AST_Self_ID.Common.LL.AST_Pending := False;
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Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access);
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pragma Assert (Result = 0);
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end RMS_AST_Handler;
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----------
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-- Self --
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----------
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function Self return Unsigned_Longword is
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Self_ID : constant Task_Id := Self;
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begin
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Self_ID.Common.LL.AST_Pending := True;
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return To_Unsigned_Longword (Self);
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end Self;
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-------------------------
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-- Starlet_AST_Handler --
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-------------------------
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procedure Starlet_AST_Handler (ID : Address) is
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Result : Interfaces.C.int;
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AST_Self_ID : constant Task_Id := To_Task_Id (ID);
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begin
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AST_Self_ID.Common.LL.AST_Pending := False;
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Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access);
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pragma Assert (Result = 0);
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end Starlet_AST_Handler;
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----------------
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-- Task_Synch --
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----------------
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procedure Task_Synch is
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Synch_Self_ID : constant Task_Id := Self;
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begin
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if Single_Lock then
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Lock_RTS;
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else
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Write_Lock (Synch_Self_ID);
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end if;
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SSL.Abort_Defer.all;
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Synch_Self_ID.Common.State := AST_Server_Sleep;
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while Synch_Self_ID.Common.LL.AST_Pending loop
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Sleep (Synch_Self_ID, AST_Server_Sleep);
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end loop;
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Synch_Self_ID.Common.State := Runnable;
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if Single_Lock then
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Unlock_RTS;
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else
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Unlock (Synch_Self_ID);
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end if;
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SSL.Abort_Undefer.all;
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end Task_Synch;
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end System.Task_Primitives.Operations.DEC;
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