-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2007, 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. --
-- This is a OpenVMS/Alpha version of this package
--- This package contains all the GNULL primitives that interface directly
--- with the underlying OS.
+-- This package contains all the GNULL primitives that interface directly with
+-- the underlying OS.
pragma Polling (Off);
--- Turn off polling, we do not want ATC polling to take place during
--- tasking operations. It causes infinite loops and other problems.
-
-with System.Tasking.Debug;
--- used for Known_Tasks
+-- Turn off polling, we do not want ATC polling to take place during tasking
+-- operations. It causes infinite loops and other problems.
-with System.OS_Primitives;
--- used for Delay_Modes
+with Ada.Unchecked_Conversion;
+with Ada.Unchecked_Deallocation;
with Interfaces.C;
--- used for int
--- size_t
+with System.Tasking.Debug;
+with System.OS_Primitives;
with System.Soft_Links;
--- used for Get_Exc_Stack_Addr
--- Abort_Defer/Undefer
-
-with Ada.Unchecked_Conversion;
-with Ada.Unchecked_Deallocation;
+with System.Aux_DEC;
package body System.Task_Primitives.Operations is
-----------------------
function To_Task_Id is
- new Ada.Unchecked_Conversion (System.Address, Task_Id);
+ new Ada.Unchecked_Conversion
+ (System.Task_Primitives.Task_Address, Task_Id);
function To_Address is
- new Ada.Unchecked_Conversion (Task_Id, System.Address);
+ new Ada.Unchecked_Conversion
+ (Task_Id, System.Task_Primitives.Task_Address);
function Get_Exc_Stack_Addr return Address;
-- Replace System.Soft_Links.Get_Exc_Stack_Addr_NT
procedure Timer_Sleep_AST (ID : Address);
+ pragma Convention (C, Timer_Sleep_AST);
-- Signal the condition variable when AST fires
procedure Timer_Sleep_AST (ID : Address) is
- Result : Interfaces.C.int;
+ Result : Interfaces.C.int;
+ pragma Warnings (Off, Result);
Self_ID : constant Task_Id := To_Task_Id (ID);
begin
Self_ID.Common.LL.AST_Pending := False;
-- Note: mutexes and cond_variables needed per-task basis are initialized
-- in Initialize_TCB and the Storage_Error is handled. Other mutexes (such
-- as RTS_Lock, Memory_Lock...) used in RTS is initialized before any
- -- status change of RTS. Therefore rasing Storage_Error in the following
+ -- status change of RTS. Therefore raising Storage_Error in the following
-- routines should be able to be handled safely.
procedure Initialize_Lock
Result : Interfaces.C.int;
begin
- if Single_Lock then
- Result :=
- pthread_cond_wait
- (Self_ID.Common.LL.CV'Access, Single_RTS_Lock'Access);
- else
- Result :=
- pthread_cond_wait
- (Self_ID.Common.LL.CV'Access, Self_ID.Common.LL.L'Access);
- end if;
+ Result :=
+ pthread_cond_wait
+ (cond => Self_ID.Common.LL.CV'Access,
+ mutex => (if Single_Lock
+ then Single_RTS_Lock'Access
+ else Self_ID.Common.LL.L'Access));
-- EINTR is not considered a failure
if Time /= 0.0 or else Mode /= Relative then
Sleep_Time := To_OS_Time (Time, Mode);
- if Mode = Relative or else OS_Clock < Sleep_Time then
+ if Mode = Relative or else OS_Clock <= Sleep_Time then
Self_ID.Common.State := Delay_Sleep;
Self_ID.Common.LL.AST_Pending := True;
exit;
end if;
- if Single_Lock then
- Result :=
- pthread_cond_wait
- (Self_ID.Common.LL.CV'Access,
- Single_RTS_Lock'Access);
- pragma Assert (Result = 0);
- else
- Result :=
- pthread_cond_wait
- (Self_ID.Common.LL.CV'Access,
- Self_ID.Common.LL.L'Access);
- pragma Assert (Result = 0);
- end if;
+ Result :=
+ pthread_cond_wait
+ (cond => Self_ID.Common.LL.CV'Access,
+ mutex => (if Single_Lock
+ then Single_RTS_Lock'Access
+ else Self_ID.Common.LL.L'Access));
+ pragma Assert (Result = 0);
Yielded := True;
procedure Enter_Task (Self_ID : Task_Id) is
begin
Self_ID.Common.LL.Thread := pthread_self;
-
Specific.Set (Self_ID);
-
- Lock_RTS;
-
- for J in Known_Tasks'Range loop
- if Known_Tasks (J) = null then
- Known_Tasks (J) := Self_ID;
- Self_ID.Known_Tasks_Index := J;
- exit;
- end if;
- end loop;
-
- Unlock_RTS;
end Enter_Task;
--------------
Result : Interfaces.C.int;
function Thread_Body_Access is new
- Ada.Unchecked_Conversion (System.Address, Thread_Body);
+ Ada.Unchecked_Conversion (System.Aux_DEC.Short_Address, Thread_Body);
begin
-- Since the initial signal mask of a thread is inherited from the
- -- creator, we need to set our local signal mask mask all signals
+ -- creator, we need to set our local signal mask to mask all signals
-- during the creation operation, to make sure the new thread is
-- not disturbed by signals before it has set its own Task_Id.
S.State := False;
else
S.Waiting := True;
- Result := pthread_cond_wait (S.CV'Access, S.L'Access);
+
+ loop
+ -- Loop in case pthread_cond_wait returns earlier than expected
+ -- (e.g. in case of EINTR caused by a signal).
+
+ Result := pthread_cond_wait (S.CV'Access, S.L'Access);
+ pragma Assert (Result = 0 or else Result = EINTR);
+
+ exit when not S.Waiting;
+ end loop;
end if;
Result := pthread_mutex_unlock (S.L'Access);
----------------
procedure Initialize (Environment_Task : Task_Id) is
+
+ -- The DEC Ada facility code defined in Starlet
+ Ada_Facility : constant := 49;
+
+ function DBGEXT (Control_Block : System.Address)
+ return System.Aux_DEC.Unsigned_Word;
+ -- DBGEXT is imported from s-tasdeb.adb and its parameter re-typed
+ -- as Address to avoid having a VMS specific s-tasdeb.ads.
+ pragma Interface (C, DBGEXT);
+ pragma Import_Function (DBGEXT, "GNAT$DBGEXT");
+
+ type Facility_Type is range 0 .. 65535;
+
+ procedure Debug_Register
+ (ADBGEXT : System.Address;
+ ATCB_Key : pthread_key_t;
+ Facility : Facility_Type;
+ Std_Prolog : Integer);
+ pragma Import (C, Debug_Register, "CMA$DEBUG_REGISTER");
begin
Environment_Task_Id := Environment_Task;
Specific.Initialize (Environment_Task);
+ -- Pass the context key on to CMA along with the other parameters
+ Debug_Register
+ (
+ DBGEXT'Address, -- Our DEBUG handling entry point
+ ATCB_Key, -- CMA context key for our Ada TCB's
+ Ada_Facility, -- Out facility code
+ 0 -- False, we don't have the std TCB prolog
+ );
+
+ -- Make environment task known here because it doesn't go through
+ -- Activate_Tasks, which does it for all other tasks.
+
+ Known_Tasks (Known_Tasks'First) := Environment_Task;
+ Environment_Task.Known_Tasks_Index := Known_Tasks'First;
+
Enter_Task (Environment_Task);
end Initialize;
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