------------------------------------------------------------------------------ -- -- -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- -- -- -- S Y S T E M . I N T E R R U P T _ M A N A G E M E N T . -- -- O P E R A T I O N S -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2004 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. -- -- Extensive contributions were provided by Ada Core Technologies, Inc. -- -- -- ------------------------------------------------------------------------------ -- This is a OpenVMS/Alpha version of this package. with System.OS_Interface; -- used for various type, constant, and operations with System.Aux_DEC; -- used for Short_Address with System.Parameters; with System.Tasking; with System.Tasking.Initialization; with System.Task_Primitives.Operations; with System.Task_Primitives.Operations.DEC; with Unchecked_Conversion; package body System.Interrupt_Management.Operations is use System.OS_Interface; use System.Parameters; use System.Tasking; use type unsigned_short; function To_Address is new Unchecked_Conversion (Task_Id, System.Address); package POP renames System.Task_Primitives.Operations; ---------------------------- -- Thread_Block_Interrupt -- ---------------------------- procedure Thread_Block_Interrupt (Interrupt : Interrupt_ID) is pragma Warnings (Off, Interrupt); begin null; end Thread_Block_Interrupt; ------------------------------ -- Thread_Unblock_Interrupt -- ------------------------------ procedure Thread_Unblock_Interrupt (Interrupt : Interrupt_ID) is pragma Warnings (Off, Interrupt); begin null; end Thread_Unblock_Interrupt; ------------------------ -- Set_Interrupt_Mask -- ------------------------ procedure Set_Interrupt_Mask (Mask : access Interrupt_Mask) is pragma Warnings (Off, Mask); begin null; end Set_Interrupt_Mask; procedure Set_Interrupt_Mask (Mask : access Interrupt_Mask; OMask : access Interrupt_Mask) is pragma Warnings (Off, Mask); pragma Warnings (Off, OMask); begin null; end Set_Interrupt_Mask; ------------------------ -- Get_Interrupt_Mask -- ------------------------ procedure Get_Interrupt_Mask (Mask : access Interrupt_Mask) is pragma Warnings (Off, Mask); begin null; end Get_Interrupt_Mask; -------------------- -- Interrupt_Wait -- -------------------- function To_unsigned_long is new Unchecked_Conversion (System.Aux_DEC.Short_Address, unsigned_long); function Interrupt_Wait (Mask : access Interrupt_Mask) return Interrupt_ID is Self_ID : constant Task_Id := Self; Iosb : IO_Status_Block_Type := (0, 0, 0); Status : Cond_Value_Type; begin -- A QIO read is registered. The system call returns immediately -- after scheduling an AST to be fired when the operation -- completes. Sys_QIO (Status => Status, Chan => Rcv_Interrupt_Chan, Func => IO_READVBLK, Iosb => Iosb, Astadr => POP.DEC.Interrupt_AST_Handler'Access, Astprm => To_Address (Self_ID), P1 => To_unsigned_long (Interrupt_Mailbox'Address), P2 => Interrupt_ID'Size / 8); pragma Assert ((Status and 1) = 1); loop -- Wait to be woken up. Could be that the AST has fired, -- in which case the Iosb.Status variable will be non-zero, -- or maybe the wait is being aborted. POP.Sleep (Self_ID, System.Tasking.Interrupt_Server_Blocked_On_Event_Flag); if Iosb.Status /= 0 then if (Iosb.Status and 1) = 1 and then Mask (Signal (Interrupt_Mailbox)) then return Interrupt_Mailbox; else return 0; end if; else POP.Unlock (Self_ID); if Single_Lock then POP.Unlock_RTS; end if; System.Tasking.Initialization.Undefer_Abort (Self_ID); System.Tasking.Initialization.Defer_Abort (Self_ID); if Single_Lock then POP.Lock_RTS; end if; POP.Write_Lock (Self_ID); end if; end loop; end Interrupt_Wait; ---------------------------- -- Install_Default_Action -- ---------------------------- procedure Install_Default_Action (Interrupt : Interrupt_ID) is pragma Warnings (Off, Interrupt); begin null; end Install_Default_Action; --------------------------- -- Install_Ignore_Action -- --------------------------- procedure Install_Ignore_Action (Interrupt : Interrupt_ID) is pragma Warnings (Off, Interrupt); begin null; end Install_Ignore_Action; ------------------------- -- Fill_Interrupt_Mask -- ------------------------- procedure Fill_Interrupt_Mask (Mask : access Interrupt_Mask) is begin Mask.all := (others => True); end Fill_Interrupt_Mask; -------------------------- -- Empty_Interrupt_Mask -- -------------------------- procedure Empty_Interrupt_Mask (Mask : access Interrupt_Mask) is begin Mask.all := (others => False); end Empty_Interrupt_Mask; --------------------------- -- Add_To_Interrupt_Mask -- --------------------------- procedure Add_To_Interrupt_Mask (Mask : access Interrupt_Mask; Interrupt : Interrupt_ID) is begin Mask (Signal (Interrupt)) := True; end Add_To_Interrupt_Mask; -------------------------------- -- Delete_From_Interrupt_Mask -- -------------------------------- procedure Delete_From_Interrupt_Mask (Mask : access Interrupt_Mask; Interrupt : Interrupt_ID) is begin Mask (Signal (Interrupt)) := False; end Delete_From_Interrupt_Mask; --------------- -- Is_Member -- --------------- function Is_Member (Mask : access Interrupt_Mask; Interrupt : Interrupt_ID) return Boolean is begin return Mask (Signal (Interrupt)); end Is_Member; ------------------------- -- Copy_Interrupt_Mask -- ------------------------- procedure Copy_Interrupt_Mask (X : out Interrupt_Mask; Y : Interrupt_Mask) is begin X := Y; end Copy_Interrupt_Mask; ------------------------- -- Interrupt_Self_Process -- ------------------------- procedure Interrupt_Self_Process (Interrupt : Interrupt_ID) is Status : Cond_Value_Type; begin Sys_QIO (Status => Status, Chan => Snd_Interrupt_Chan, Func => IO_WRITEVBLK, P1 => To_unsigned_long (Interrupt'Address), P2 => Interrupt_ID'Size / 8); pragma Assert ((Status and 1) = 1); end Interrupt_Self_Process; begin Environment_Mask := (others => False); All_Tasks_Mask := (others => True); for J in Interrupt_ID loop if Keep_Unmasked (J) then Environment_Mask (Signal (J)) := True; All_Tasks_Mask (Signal (J)) := False; end if; end loop; end System.Interrupt_Management.Operations;