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- -----------------------------------------------------------------------------
- -- --
- -- GNAT COMPILER COMPONENTS --
- -- --
- -- S Y S T E M . T A S K _ S P E C I F I C _ D A T A --
- -- --
- -- B o d y --
- -- --
- -- $Revision: 1.6 $ --
- -- --
- -- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved --
- -- --
- -- The GNAT library is free software; you can redistribute it and/or modify --
- -- it under terms of the GNU Library General Public License as published by --
- -- the Free Software Foundation; either version 2, or (at your option) any --
- -- later version. The GNAT library is distributed in the hope that it will --
- -- be useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
- -- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
- -- Library General Public License for more details. You should have --
- -- received a copy of the GNU Library General Public License along with --
- -- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
- -- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
- -- --
- ------------------------------------------------------------------------------
-
- with Unchecked_Conversion;
- with Unchecked_Deallocation;
-
- with System.Tasking_Soft_Links; use System.Tasking_Soft_Links;
-
- -- This package has to be elaborated after the secondary stack if this
- -- package is present. We can't put a pragma elaborate otherwise we would
- -- require this package to be always present. So we must rely on the
- -- default alphabetical ordering of the binder.
-
- package body System.Task_Specific_Data is
-
- type TSD is record
- Jmpbuf_Address : Address := Null_Address;
- GNAT_Exception : Address := Null_Address;
- Sec_Stack_Addr : Address := Null_Address;
- end record;
-
- -- ??? changed the next access type into a general access type to avoid a
- -- lurking visibility problem.
-
- type TSD_Ptr is access all TSD;
-
- function From_Address is new
- Unchecked_Conversion (Address, TSD_Ptr);
-
- function To_Address is new
- Unchecked_Conversion (TSD_Ptr, Address);
-
- ------------------------
- -- Get_Jmpbuf_Address --
- ------------------------
-
- function Get_Jmpbuf_Address return Address is
- begin
- return From_Address (Get_TSD_Address (True)).Jmpbuf_Address;
- end Get_Jmpbuf_Address;
-
- ------------------------
- -- Set_Jmpbuf_Address --
- ------------------------
-
- procedure Set_Jmpbuf_Address (Addr : Address) is
- begin
- From_Address (Get_TSD_Address (True)).Jmpbuf_Address := Addr;
- end Set_Jmpbuf_Address;
-
- ------------------------
- -- Get_GNAT_Exception --
- ------------------------
-
- function Get_GNAT_Exception return Address is
- begin
- return From_Address (Get_TSD_Address (True)).GNAT_Exception;
- end Get_GNAT_Exception;
-
- ------------------------
- -- Set_GNAT_Exception --
- ------------------------
-
- procedure Set_GNAT_Exception (Addr : Address) is
- begin
- From_Address (Get_TSD_Address (True)).GNAT_Exception := Addr;
- end Set_GNAT_Exception;
-
- ------------------------
- -- Get_Sec_Stack_Addr --
- ------------------------
-
- function Get_Sec_Stack_Addr return Address is
- begin
- return From_Address (Get_TSD_Address (True)).Sec_Stack_Addr;
- end Get_Sec_Stack_Addr;
-
- ------------------------
- -- Set_Sec_Stack_Addr --
- ------------------------
-
- procedure Set_Sec_Stack_Addr (Addr : Address) is
- begin
- From_Address (Get_TSD_Address (True)).Sec_Stack_Addr := Addr;
- end Set_Sec_Stack_Addr;
-
- ----------------
- -- Create_TSD --
- ----------------
-
- function Create_TSD return Address is
- New_TSD : constant TSD_Ptr := new TSD;
-
- begin
- System.Tasking_Soft_Links.SS_Init (New_TSD.Sec_Stack_Addr, 10*1024);
- -- Allocate 10K secondary stack
-
- return To_Address (New_TSD);
- end Create_TSD;
-
- -----------------
- -- Destroy_TSD --
- -----------------
-
- procedure Destroy_TSD (TSD_Addr : Address) is
- Old_TSD : TSD_Ptr := From_Address (TSD_Addr);
-
- procedure Free is new
- Unchecked_Deallocation (TSD, TSD_Ptr);
-
- begin
- System.Tasking_Soft_Links.SS_Free (Old_TSD.Sec_Stack_Addr);
- Free (Old_TSD);
- end Destroy_TSD;
-
- begin
- -- Intialize the TSD for the non-tasking case
-
- Non_Tasking_TSD := Create_TSD;
-
- end System.Task_Specific_Data;
-