| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- SYSTEM.TASK_PRIMITIVES.OPERATIONS.DEC -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2000-2003 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 package is for OpenVMS/Alpha |
| |
| with System.OS_Interface; |
| with System.Parameters; |
| with System.Tasking; |
| with Unchecked_Conversion; |
| with System.Soft_Links; |
| |
| package body System.Task_Primitives.Operations.DEC is |
| |
| use System.OS_Interface; |
| use System.Parameters; |
| use System.Tasking; |
| use System.Aux_DEC; |
| use type Interfaces.C.int; |
| |
| package SSL renames System.Soft_Links; |
| |
| -- The FAB_RAB_Type specifies where the context field (the calling |
| -- task) is stored. Other fields defined for FAB_RAB arent' 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 : constant Task_ID := Self; |
| begin |
| if Single_Lock then |
| Lock_RTS; |
| else |
| Write_Lock (Synch_Self_ID); |
| end if; |
| |
| SSL.Abort_Defer.all; |
| 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; |
| |
| if Single_Lock then |
| Unlock_RTS; |
| else |
| Unlock (Synch_Self_ID); |
| end if; |
| |
| SSL.Abort_Undefer.all; |
| end Task_Synch; |
| |
| end System.Task_Primitives.Operations.DEC; |
