------------------------------------------------------------------------------ -- -- -- 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: 1.1.1.2 $ -- -- -- -- 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 aren't 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;