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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-tasuti.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-tasuti.ads | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-tasuti.ads b/gcc-4.2.1/gcc/ada/s-tasuti.ads new file mode 100644 index 000000000..35f00fe9a --- /dev/null +++ b/gcc-4.2.1/gcc/ada/s-tasuti.ads @@ -0,0 +1,105 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- S Y S T E M . T A S K I N G . U T I L I T I E S -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2005, 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. -- +-- -- +------------------------------------------------------------------------------ + +-- This package provides RTS Internal Declarations. +-- These declarations are not part of the GNARLI + +with Unchecked_Conversion; + +package System.Tasking.Utilities is + + function ATCB_To_Address is new + Unchecked_Conversion (Task_Id, System.Address); + + --------------------------------- + -- Task_Stage Related routines -- + --------------------------------- + + procedure Make_Independent; + -- Move the current task to the outermost level (level 2) of the master + -- hierarchy of the environment task. That is one level further out + -- than normal tasks defined in library-level packages (level 3). The + -- environment task will wait for level 3 tasks to terminate normally, + -- then it will abort all the level 2 tasks. See Finalize_Global_Tasks + -- procedure for more information. + -- + -- This is a dangerous operation, and should only be used on nested tasks + -- or tasks that depend on any objects that might be finalized earlier than + -- the termination of the environment task. It is for internal use by the + -- GNARL, to prevent such internal server tasks from preventing a partition + -- from terminating. + -- + -- Also note that the run time assumes that the parent of an independent + -- task is the environment task. If this is not the case, Make_Independent + -- will change the task's parent. This assumption is particularly + -- important for master level completion and for the computation of + -- Independent_Task_Count. + + Independent_Task_Count : Natural := 0; + -- Number of independent task. This counter is incremented each time + -- Make_Independent is called. Note that if a server task terminates, + -- this counter will not be decremented. Since Make_Independent locks + -- the environment task (because every independent task depends on it), + -- this counter is protected by the environment task's lock. + + --------------------------------- + -- Task Abort Related Routines -- + --------------------------------- + + procedure Cancel_Queued_Entry_Calls (T : Task_Id); + -- Cancel any entry calls queued on target task. + -- Call this while holding T's lock (or RTS_Lock in Single_Lock mode). + + procedure Exit_One_ATC_Level (Self_ID : Task_Id); + pragma Inline (Exit_One_ATC_Level); + -- Call only with abort deferred and holding lock of Self_ID. + -- This is a bit of common code for all entry calls. + -- The effect is to exit one level of ATC nesting. + + procedure Abort_One_Task (Self_ID : Task_Id; T : Task_Id); + -- Similar to Locked_Abort_To_Level (Self_ID, T, 0), but: + -- (1) caller should be holding no locks + -- (2) may be called for tasks that have not yet been activated + -- (3) always aborts whole task + + procedure Abort_Tasks (Tasks : Task_List); + -- Abort_Tasks is called to initiate abort, however, the actual + -- aborti is done by aborted task by means of Abort_Handler + + procedure Make_Passive (Self_ID : Task_Id; Task_Completed : Boolean); + -- Update counts to indicate current task is either terminated or + -- accepting on a terminate alternative. Call holding no locks except + -- Global_Task_Lock when calling from Terminate_Task, and RTS_Lock when + -- Single_Lock is True. + +end System.Tasking.Utilities; |