-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, 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 2, or (at your option) any later ver- --
--- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
+-- 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. 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, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- 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. --
+-- 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. --
-- rendezvous.
with Ada.Task_Identification;
--- used for Task_Id type
-
-with Ada.Exceptions;
--- used for Raise_Exception
+with Ada.Unchecked_Conversion;
with System.Task_Primitives;
--- used for RTS_Lock
--- Self
-
with System.Interrupt_Management;
--- used for Reserve
--- Interrupt_ID
--- Interrupt_Mask
--- Abort_Task_Interrupt
with System.Interrupt_Management.Operations;
--- used for Thread_Block_Interrupt
--- Thread_Unblock_Interrupt
--- Install_Default_Action
--- Install_Ignore_Action
--- Copy_Interrupt_Mask
--- Set_Interrupt_Mask
--- Empty_Interrupt_Mask
--- Fill_Interrupt_Mask
--- Add_To_Interrupt_Mask
--- Delete_From_Interrupt_Mask
--- Interrupt_Wait
--- Interrupt_Self_Process
--- Get_Interrupt_Mask
--- Set_Interrupt_Mask
--- IS_Member
--- Environment_Mask
pragma Elaborate_All (System.Interrupt_Management.Operations);
with System.Task_Primitives.Operations;
--- used for Write_Lock
--- Unlock
--- Abort
--- Wakeup_Task
--- Sleep
--- Initialize_Lock
-
with System.Task_Primitives.Interrupt_Operations;
--- used for Set_Interrupt_ID
-
with System.Storage_Elements;
--- used for To_Address
--- To_Integer
--- Integer_Address
-
with System.Tasking.Utilities;
--- used for Make_Independent
with System.Tasking.Rendezvous;
--- used for Call_Simple
pragma Elaborate_All (System.Tasking.Rendezvous);
with System.Tasking.Initialization;
--- used for Defer_Abort
--- Undefer_Abort
-
with System.Parameters;
--- used for Single_Lock
-
-with Unchecked_Conversion;
package body System.Interrupts is
use Tasking;
use System.Parameters;
- use Ada.Exceptions;
package POP renames System.Task_Primitives.Operations;
package PIO renames System.Task_Primitives.Interrupt_Operations;
package IMNG renames System.Interrupt_Management;
package IMOP renames System.Interrupt_Management.Operations;
- function To_System is new Unchecked_Conversion
+ function To_System is new Ada.Unchecked_Conversion
(Ada.Task_Identification.Task_Id, Task_Id);
-----------------
Registered_Handler_Tail : R_Link := null;
Access_Hold : Server_Task_Access;
- -- variable used to allocate Server_Task using "new".
+ -- variable used to allocate Server_Task using "new"
-----------------------
-- Local Subprograms --
procedure Register_Interrupt_Handler (Handler_Addr : System.Address) is
New_Node_Ptr : R_Link;
+
begin
-- This routine registers the Handler as usable for Dynamic
-- Interrupt Handler. Routines attaching and detaching Handler
- -- dynamically should first consult if the Handler is rgistered.
+ -- dynamically should first consult if the Handler is registered.
-- A Program Error should be raised if it is not registered.
-- The pragma Interrupt_Handler can only appear in the library
Handler_Addr : System.Address;
end record;
- function To_Fat_Ptr is new Unchecked_Conversion
+ function To_Fat_Ptr is new Ada.Unchecked_Conversion
(Parameterless_Handler, Fat_Ptr);
Ptr : R_Link;
function Is_Entry_Attached (Interrupt : Interrupt_ID) return Boolean is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
return User_Entry (Interrupt).T /= Null_Task;
function Is_Handler_Attached (Interrupt : Interrupt_ID) return Boolean is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
return User_Handler (Interrupt).H /= null;
function Is_Blocked (Interrupt : Interrupt_ID) return Boolean is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
return Blocked (Interrupt);
function Is_Ignored (Interrupt : Interrupt_ID) return Boolean is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
return Ignored (Interrupt);
is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
-- ??? Since Parameterless_Handler is not Atomic, the current
-- Calling this procedure with New_Handler = null and Static = True
-- means we want to detach the current handler regardless of the
- -- previous handler's binding status (ie. do not care if it is a
+ -- previous handler's binding status (i.e. do not care if it is a
-- dynamic or static handler).
-- This option is needed so that during the finalization of a PO, we
Static : Boolean := False) is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
Interrupt_Manager.Attach_Handler (New_Handler, Interrupt, Static);
-- Calling this procedure with New_Handler = null and Static = True means
-- we want to detach the current handler regardless of the previous
- -- handler's binding status (ie. do not care if it is dynamic or static
+ -- handler's binding status (i.e. do not care if it is dynamic or static
-- handler).
-- This option is needed so that during the finalization of a PO, we can
is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
Interrupt_Manager.Exchange_Handler
is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
Interrupt_Manager.Detach_Handler (Interrupt, Static);
function Reference (Interrupt : Interrupt_ID) return System.Address is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
return Storage_Elements.To_Address
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
Interrupt_Manager.Bind_Interrupt_To_Entry (T, E, Interrupt);
procedure Block_Interrupt (Interrupt : Interrupt_ID) is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
Interrupt_Manager.Block_Interrupt (Interrupt);
procedure Unblock_Interrupt (Interrupt : Interrupt_ID) is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
Interrupt_Manager.Unblock_Interrupt (Interrupt);
(Interrupt : Interrupt_ID) return System.Tasking.Task_Id is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
return Last_Unblocker (Interrupt);
procedure Ignore_Interrupt (Interrupt : Interrupt_ID) is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
Interrupt_Manager.Ignore_Interrupt (Interrupt);
procedure Unignore_Interrupt (Interrupt : Interrupt_ID) is
begin
if Is_Reserved (Interrupt) then
- Raise_Exception (Program_Error'Identity, "Interrupt" &
- Interrupt_ID'Image (Interrupt) & " is reserved");
+ raise Program_Error with
+ "Interrupt" & Interrupt_ID'Image (Interrupt) & " is reserved";
end if;
Interrupt_Manager.Unignore_Interrupt (Interrupt);
is
begin
if User_Entry (Interrupt).T /= Null_Task then
+
-- In case we have an Interrupt Entry already installed.
-- raise a program error. (propagate it to the caller).
- Raise_Exception (Program_Error'Identity,
- "An interrupt is already installed");
+ raise Program_Error with "An interrupt is already installed";
end if;
- -- Note : A null handler with Static = True will
- -- pass the following check. That is the case when we want to
- -- Detach a handler regardless of the Static status
- -- of the current_Handler.
- -- We don't check anything if Restoration is True, since we
- -- may be detaching a static handler to restore a dynamic one.
+ -- Note: A null handler with Static=True will pass the following
+ -- check. That is the case when we want to Detach a handler
+ -- regardless of the Static status of the current_Handler. We don't
+ -- check anything if Restoration is True, since we may be detaching
+ -- a static handler to restore a dynamic one.
if not Restoration and then not Static
+
-- Tries to overwrite a static Interrupt Handler with a
-- dynamic Handler
or else not Is_Registered (New_Handler))
then
- Raise_Exception (Program_Error'Identity,
+ raise Program_Error with
"Trying to overwrite a static Interrupt Handler with a " &
- "dynamic Handler");
+ "dynamic Handler";
end if;
- -- The interrupt should no longer be ingnored if
- -- it was ever ignored.
+ -- The interrupt should no longer be ignored if it was ever ignored
Ignored (Interrupt) := False;
if New_Handler = null then
- -- The null handler means we are detaching the handler.
+ -- The null handler means we are detaching the handler
User_Handler (Interrupt).Static := False;
is
begin
if User_Entry (Interrupt).T /= Null_Task then
+
-- In case we have an Interrupt Entry installed.
-- raise a program error. (propagate it to the caller).
- Raise_Exception (Program_Error'Identity,
- "An interrupt entry is already installed");
+ raise Program_Error with
+ "An interrupt entry is already installed";
end if;
-- Note : Static = True will pass the following check. That is the
-- Tries to detach a static Interrupt Handler.
-- raise a program error.
- Raise_Exception (Program_Error'Identity,
- "Trying to detach a static Interrupt Handler");
+ raise Program_Error with
+ "Trying to detach a static Interrupt Handler";
end if;
-- The interrupt should no longer be ignored if
System.Tasking.Utilities.Make_Independent;
- -- Environmen task gets its own interrupt mask, saves it,
+ -- Environment task gets its own interrupt mask, saves it,
-- and then masks all interrupts except the Keep_Unmasked set.
-- During rendezvous, the Interrupt_Manager receives the old
-- Abort_Task_Interrupt is one of the Interrupt unmasked
-- in all tasks. We mask the Interrupt in this particular task
- -- so that "sigwait" is possible to catch an explicitely sent
+ -- so that "sigwait" is possible to catch an explicitly sent
-- Abort_Task_Interrupt from the Server_Tasks.
-- This sigwaiting is needed so that we make sure a Server_Task is
-- out of its own sigwait state. This extra synchronization is
- -- necessary to prevent following senarios.
+ -- necessary to prevent following scenarios.
-- 1) Interrupt_Manager sends an Abort_Task_Interrupt to the
-- Server_Task then changes its own interrupt mask (OS level).
-- If an interrupt (corresponding to the Server_Task) arrives
- -- in the nean time we have the Interrupt_Manager umnasked and
+ -- in the mean time we have the Interrupt_Manager unmasked and
-- the Server_Task waiting on sigwait.
-- 2) For unbinding handler, we install a default action in the
-- Interrupt_Manager. POSIX.1c states that the result of using
- -- "sigwait" and "sigaction" simaltaneously on the same interrupt
+ -- "sigwait" and "sigaction" simultaneously on the same interrupt
-- is undefined. Therefore, we need to be informed from the
-- Server_Task of the fact that the Server_Task is out of its
-- sigwait stage.
if User_Handler (Interrupt).H /= null
or else User_Entry (Interrupt).T /= Null_Task
then
- Raise_Exception (Program_Error'Identity,
- "A binding for this interrupt is already present");
+ raise Program_Error with
+ "A binding for this interrupt is already present";
end if;
- -- The interrupt should no longer be ingnored if
+ -- The interrupt should no longer be ignored if
-- it was ever ignored.
Ignored (Interrupt) := False;
end if;
end loop;
- -- Indicate in ATCB that no Interrupt Entries are attached.
+ -- Indicate in ATCB that no Interrupt Entries are attached
T.Interrupt_Entry := False;
end Detach_Interrupt_Entries;
System.Tasking.Utilities.Make_Independent;
- -- Install default action in system level.
+ -- Install default action in system level
IMOP.Install_Default_Action (IMNG.Interrupt_ID (Interrupt));
IMOP.Add_To_Interrupt_Mask
(Intwait_Mask'Access, IMNG.Interrupt_ID (Interrupt));
- -- Remember the Interrupt_ID for Abort_Task.
+ -- Remember the Interrupt_ID for Abort_Task
PIO.Set_Interrupt_ID (IMNG.Interrupt_ID (Interrupt), Self_ID);
-- (Abort_Task_Interrupt) from the Interrupt_Manager for unbinding
-- a Procedure Handler or an Entry. Or it could be a wake up
-- from status change (Unblocked -> Blocked). If that is not
- -- the case, we should exceute the attached Procedure or Entry.
+ -- the case, we should execute the attached Procedure or Entry.
if Single_Lock then
POP.Lock_RTS;
if User_Handler (Interrupt).H /= null then
Tmp_Handler := User_Handler (Interrupt).H;
- -- RTS calls should not be made with self being locked.
+ -- RTS calls should not be made with self being locked
POP.Unlock (Self_ID);
Tmp_ID := User_Entry (Interrupt).T;
Tmp_Entry_Index := User_Entry (Interrupt).E;
- -- RTS calls should not be made with self being locked.
+ -- RTS calls should not be made with self being locked
POP.Unlock (Self_ID);
end loop;
end Install_Handlers;
+ ---------------------------------
+ -- Install_Restricted_Handlers --
+ ---------------------------------
+
+ procedure Install_Restricted_Handlers (Handlers : New_Handler_Array) is
+ begin
+ for N in Handlers'Range loop
+ Attach_Handler (Handlers (N).Handler, Handlers (N).Interrupt, True);
+ end loop;
+ end Install_Restricted_Handlers;
+
-- Elaboration code for package System.Interrupts
begin
-
- -- Get Interrupt_Manager's ID so that Abort_Interrupt can be sent.
+ -- Get Interrupt_Manager's ID so that Abort_Interrupt can be sent
Interrupt_Manager_ID := To_System (Interrupt_Manager'Identity);
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