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diff --git a/gcc-4.4.0/gcc/ada/s-tassta.ads b/gcc-4.4.0/gcc/ada/s-tassta.ads deleted file mode 100644 index 036474321..000000000 --- a/gcc-4.4.0/gcc/ada/s-tassta.ads +++ /dev/null @@ -1,305 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- --- -- --- S Y S T E M . T A S K I N G . S T A G E S -- --- -- --- S p e c -- --- -- --- 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 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. -- --- -- --- 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 package represents the high level tasking interface used by the --- compiler to expand Ada 95 tasking constructs into simpler run time calls --- (aka GNARLI, GNU Ada Run-time Library Interface) - --- Note: Only the compiler is allowed to use this interface, by generating --- direct calls to it, via Rtsfind. - --- Any changes to this interface may require corresponding compiler changes --- in exp_ch9.adb and possibly exp_ch7.adb - -with System.Task_Info; -with System.Parameters; - -with Ada.Real_Time; - -package System.Tasking.Stages is - pragma Elaborate_Body; - - -- The compiler will expand in the GNAT tree the following construct: - - -- task type T (Discr : Integer); - - -- task body T is - -- ...declarations, possibly some controlled... - -- begin - -- ...B...; - -- end T; - - -- T1 : T (1); - - -- as follows: - - -- enter_master.all; - - -- _chain : aliased activation_chain; - -- activation_chainIP (_chain); - - -- task type t (discr : integer); - -- tE : aliased boolean := false; - -- tZ : size_type := unspecified_size; - -- type tV (discr : integer) is limited record - -- _task_id : task_id; - -- end record; - -- procedure tB (_task : access tV); - -- freeze tV [ - -- procedure tVIP (_init : in out tV; _master : master_id; - -- _chain : in out activation_chain; _task_id : in task_image_type; - -- discr : integer) is - -- begin - -- _init.discr := discr; - -- _init._task_id := null; - -- create_task (unspecified_priority, tZ, - -- unspecified_task_info, ada__real_time__time_span_zero, 0, - -- _master, task_procedure_access!(tB'address), - -- _init'address, tE'unchecked_access, _chain, _task_id, _init. - -- _task_id); - -- return; - -- end tVIP; - -- ] - - -- procedure tB (_task : access tV) is - -- discr : integer renames _task.discr; - - -- procedure _clean is - -- begin - -- abort_defer.all; - -- complete_task; - -- finalize_list (F14b); - -- abort_undefer.all; - -- return; - -- end _clean; - -- begin - -- abort_undefer.all; - -- ...declarations... - -- complete_activation; - -- ...B...; - -- return; - -- at end - -- _clean; - -- end tB; - - -- tE := true; - -- t1 : t (1); - -- _master : constant master_id := current_master.all; - -- t1S : task_image_type := new string'"t1"; - -- task_image_typeIP (t1, _master, _chain, t1S, 1); - - -- activate_tasks (_chain'unchecked_access); - - procedure Abort_Tasks (Tasks : Task_List); - -- Compiler interface only. Do not call from within the RTS. Initiate - -- abort, however, the actual abort is done by abortee by means of - -- Abort_Handler and Abort_Undefer - -- - -- source code: - -- Abort T1, T2; - -- code expansion: - -- abort_tasks (task_list'(t1._task_id, t2._task_id)); - - procedure Activate_Tasks (Chain_Access : Activation_Chain_Access); - -- Compiler interface only. Do not call from within the RTS. - -- This must be called by the creator of a chain of one or more new tasks, - -- to activate them. The chain is a linked list that up to this point is - -- only known to the task that created them, though the individual tasks - -- are already in the All_Tasks_List. - -- - -- The compiler builds the chain in LIFO order (as a stack). Another - -- version of this procedure had code to reverse the chain, so as to - -- activate the tasks in the order of declaration. This might be nice, but - -- it is not needed if priority-based scheduling is supported, since all - -- the activated tasks synchronize on the activators lock before they - -- start activating and so they should start activating in priority order. - -- ??? Actually, the body of this package DOES reverse the chain, so I - -- don't understand the above comment. - - procedure Complete_Activation; - -- Compiler interface only. Do not call from within the RTS. - -- This should be called from the task body at the end of - -- the elaboration code for its declarative part. - -- Decrement the count of tasks to be activated by the activator and - -- wake it up so it can check to see if all tasks have been activated. - -- Except for the environment task, which should never call this procedure, - -- T.Activator should only be null iff T has completed activation. - - procedure Complete_Master; - -- Compiler interface only. Do not call from within the RTS. This must - -- be called on exit from any master where Enter_Master was called. - -- Assume abort is deferred at this point. - - procedure Complete_Task; - -- Compiler interface only. Do not call from within the RTS. - -- This should be called from an implicit at-end handler - -- associated with the task body, when it completes. - -- From this point, the current task will become not callable. - -- If the current task have not completed activation, this should be done - -- now in order to wake up the activator (the environment task). - - procedure Create_Task - (Priority : Integer; - Size : System.Parameters.Size_Type; - Task_Info : System.Task_Info.Task_Info_Type; - Relative_Deadline : Ada.Real_Time.Time_Span; - Num_Entries : Task_Entry_Index; - Master : Master_Level; - State : Task_Procedure_Access; - Discriminants : System.Address; - Elaborated : Access_Boolean; - Chain : in out Activation_Chain; - Task_Image : String; - Created_Task : out Task_Id; - Build_Entry_Names : Boolean); - -- Compiler interface only. Do not call from within the RTS. - -- This must be called to create a new task. - -- - -- Priority is the task's priority (assumed to be in the - -- System.Any_Priority'Range) - -- Size is the stack size of the task to create - -- Task_Info is the task info associated with the created task, or - -- Unspecified_Task_Info if none. - -- Relative_Deadline is the relative deadline associated with the created - -- task by means of a pragma Relative_Deadline, or 0.0 if none. - -- State is the compiler generated task's procedure body - -- Discriminants is a pointer to a limited record whose discriminants - -- are those of the task to create. This parameter should be passed as - -- the single argument to State. - -- Elaborated is a pointer to a Boolean that must be set to true on exit - -- if the task could be successfully elaborated. - -- Chain is a linked list of task that needs to be created. On exit, - -- Created_Task.Activation_Link will be Chain.T_ID, and Chain.T_ID - -- will be Created_Task (e.g the created task will be linked at the front - -- of Chain). - -- Task_Image is a string created by the compiler that the - -- run time can store to ease the debugging and the - -- Ada.Task_Identification facility. - -- Created_Task is the resulting task. - -- Build_Entry_Names is a flag which controls the allocation of the data - -- structure which stores all entry names. - -- - -- This procedure can raise Storage_Error if the task creation failed. - - function Current_Master return Master_Level; - -- Compiler interface only. - -- This is called to obtain the current master nesting level. - - procedure Enter_Master; - -- Compiler interface only. Do not call from within the RTS. - -- This must be called on entry to any "master" where a task, - -- or access type designating objects containing tasks, may be - -- declared. - - procedure Expunge_Unactivated_Tasks (Chain : in out Activation_Chain); - -- Compiler interface only. Do not call from within the RTS. - -- This must be called by the compiler-generated code for an allocator if - -- the allocated object contains tasks, if the allocator exits without - -- calling Activate_Tasks for a given activation chains, as can happen if - -- an exception occurs during initialization of the object. - -- - -- This should be called ONLY for tasks created via an allocator. Recovery - -- of storage for unactivated local task declarations is done by - -- Complete_Master and Complete_Task. - -- - -- We remove each task from Chain and All_Tasks_List before we free the - -- storage of its ATCB. - -- - -- In other places where we recover the storage of unactivated tasks, we - -- need to clean out the entry queues, but here that should not be - -- necessary, since these tasks should not have been visible to any other - -- tasks, and so no task should be able to queue a call on their entries. - -- - -- Just in case somebody misuses this subprogram, there is a check to - -- verify this condition. - - procedure Finalize_Global_Tasks; - -- This should be called to complete the execution of the environment task - -- and shut down the tasking runtime system. It is the equivalent of - -- Complete_Task, but for the environment task. - -- - -- The environment task must first call Complete_Master, to wait for user - -- tasks that depend on library-level packages to terminate. It then calls - -- Abort_Dependents to abort the "independent" library-level server tasks - -- that are created implicitly by the RTS packages (signal and timer server - -- tasks), and then waits for them to terminate. Then, it calls - -- Vulnerable_Complete_Task. - -- - -- It currently also executes the global finalization list, and then resets - -- the "soft links". - - procedure Free_Task (T : Task_Id); - -- Recover all runtime system storage associated with the task T, but only - -- if T has terminated. Do nothing in the other case. It is called from - -- Unchecked_Deallocation, for objects that are or contain tasks. - - procedure Move_Activation_Chain - (From, To : Activation_Chain_Access; - New_Master : Master_ID); - -- Compiler interface only. Do not call from within the RTS. - -- Move all tasks on From list to To list, and change their Master_of_Task - -- to be New_Master. This is used to implement build-in-place function - -- returns. Tasks that are part of the return object are initially placed - -- on an activation chain local to the return statement, and their master - -- is the return statement, in case the return statement is left - -- prematurely (due to raising an exception, being aborted, or a goto or - -- exit statement). Once the return statement has completed successfully, - -- Move_Activation_Chain is called to move them to the caller's activation - -- chain, and change their master to the one passed in by the caller. If - -- that doesn't happen, they will never be activated, and will become - -- terminated on leaving the return statement. - - procedure Set_Entry_Name - (T : Task_Id; - Pos : Task_Entry_Index; - Val : String_Access); - -- This is called by the compiler to map a string which denotes an entry - -- name to a task entry index. - - function Terminated (T : Task_Id) return Boolean; - -- This is called by the compiler to implement the 'Terminated attribute. - -- Though is not required to be so by the ARM, we choose to synchronize - -- with the task's ATCB, so that this is more useful for polling the state - -- of a task, and so that it becomes an abort completion point for the - -- calling task (via Undefer_Abort). - -- - -- source code: - -- T1'Terminated - -- - -- code expansion: - -- terminated (t1._task_id) - - procedure Terminate_Task (Self_ID : Task_Id); - -- Terminate the calling task. - -- This should only be called by the Task_Wrapper procedure, and to - -- deallocate storage associate with foreign tasks. - -end System.Tasking.Stages; |