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Diffstat (limited to 'gcc-4.2.1/gcc/ada/a-dynpri.adb')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/a-dynpri.adb | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/gcc-4.2.1/gcc/ada/a-dynpri.adb b/gcc-4.2.1/gcc/ada/a-dynpri.adb deleted file mode 100644 index 82da81552..000000000 --- a/gcc-4.2.1/gcc/ada/a-dynpri.adb +++ /dev/null @@ -1,162 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- --- -- --- A D A . D Y N A M I C _ P R I O R I T I E S -- --- -- --- B o d y -- --- -- --- Copyright (C) 1992-2006, 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, 51 Franklin Street, Fifth Floor, -- --- Boston, MA 02110-1301, 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. -- --- -- ------------------------------------------------------------------------------- - -with System.Task_Primitives.Operations; --- used for Write_Lock --- Unlock --- Set_Priority --- Wakeup --- Self - -with System.Tasking; --- used for Task_Id - -with System.Parameters; --- used for Single_Lock - -with System.Soft_Links; --- use for Abort_Defer --- Abort_Undefer - -with Unchecked_Conversion; - -package body Ada.Dynamic_Priorities is - - package STPO renames System.Task_Primitives.Operations; - package SSL renames System.Soft_Links; - - use System.Parameters; - use System.Tasking; - - function Convert_Ids is new - Unchecked_Conversion - (Task_Identification.Task_Id, System.Tasking.Task_Id); - - ------------------ - -- Get_Priority -- - ------------------ - - -- Inquire base priority of a task - - function Get_Priority - (T : Ada.Task_Identification.Task_Id := - Ada.Task_Identification.Current_Task) return System.Any_Priority - is - Target : constant Task_Id := Convert_Ids (T); - Error_Message : constant String := "Trying to get the priority of a "; - - begin - if Target = Convert_Ids (Ada.Task_Identification.Null_Task_Id) then - raise Program_Error with Error_Message & "null task"; - end if; - - if Task_Identification.Is_Terminated (T) then - raise Tasking_Error with Error_Message & "null task"; - end if; - - return Target.Common.Base_Priority; - end Get_Priority; - - ------------------ - -- Set_Priority -- - ------------------ - - -- Change base priority of a task dynamically - - procedure Set_Priority - (Priority : System.Any_Priority; - T : Ada.Task_Identification.Task_Id := - Ada.Task_Identification.Current_Task) - is - Target : constant Task_Id := Convert_Ids (T); - Self_ID : constant Task_Id := STPO.Self; - Error_Message : constant String := "Trying to set the priority of a "; - - begin - if Target = Convert_Ids (Ada.Task_Identification.Null_Task_Id) then - raise Program_Error with Error_Message & "null task"; - end if; - - if Task_Identification.Is_Terminated (T) then - raise Tasking_Error with Error_Message & "terminated task"; - end if; - - SSL.Abort_Defer.all; - - if Single_Lock then - STPO.Lock_RTS; - end if; - - STPO.Write_Lock (Target); - - if Self_ID = Target then - Target.Common.Base_Priority := Priority; - STPO.Set_Priority (Target, Priority); - - STPO.Unlock (Target); - - if Single_Lock then - STPO.Unlock_RTS; - end if; - - -- Yield is needed to enforce FIFO task dispatching - - -- LL Set_Priority is made while holding the RTS lock so that it - -- is inheriting high priority until it release all the RTS locks. - - -- If this is used in a system where Ceiling Locking is - -- not enforced we may end up getting two Yield effects. - - STPO.Yield; - - else - Target.New_Base_Priority := Priority; - Target.Pending_Priority_Change := True; - Target.Pending_Action := True; - - STPO.Wakeup (Target, Target.Common.State); - - -- If the task is suspended, wake it up to perform the change. - -- check for ceiling violations ??? - - STPO.Unlock (Target); - - if Single_Lock then - STPO.Unlock_RTS; - end if; - end if; - - SSL.Abort_Undefer.all; - end Set_Priority; - -end Ada.Dynamic_Priorities; |