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168 | ------------------------------------------------------------------------------
-- --
-- GLADE COMPONENTS --
-- --
-- S Y S T E M . G A R L I C . T A S K I N G --
-- --
-- S p e c --
-- --
-- Copyright (C) 1996-2020 Free Software Foundation, Inc. --
-- --
-- GARLIC 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. GARLIC is distributed in the hope that it will be useful, but --
-- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABI- --
-- LITY 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 GARLIC; 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. --
-- --
------------------------------------------------------------------------------
with Ada.Task_Identification;
pragma Elaborate_All (Ada.Task_Identification);
with Ada.Unchecked_Deallocation;
with System.Garlic.Soft_Links;
with System.Garlic.Types;
package System.Garlic.Tasking is
procedure Initialize;
-------------------------------------------
-- Critical Section for PCS with Tasking --
-------------------------------------------
procedure Enter_Critical_Section;
procedure Leave_Critical_Section;
--------------------------------
-- Mutex for PCS with Tasking --
--------------------------------
type Protected_Mutex_Type is new Soft_Links.Mutex_Type with private;
function Create return Soft_Links.Mutex_Access;
procedure Enter (M : Protected_Mutex_Type);
procedure Destroy (M : in out Protected_Mutex_Type);
procedure Leave (M : Protected_Mutex_Type);
----------------------------------
-- Watcher for PCS with Tasking --
----------------------------------
type Protected_Watcher_Type is new Soft_Links.Watcher_Type with private;
function Create (V : Types.Version_Id) return Soft_Links.Watcher_Access;
procedure Destroy (W : in out Protected_Watcher_Type);
procedure Differ
(W : in out Protected_Watcher_Type;
V : Types.Version_Id);
procedure Lookup
(W : Protected_Watcher_Type;
V : out Types.Version_Id);
procedure Update (W : in out Protected_Watcher_Type);
-----------------------------------------
-- Advanced Mutex for PCS with Tasking --
-----------------------------------------
type Protected_Adv_Mutex_Type is new Soft_Links.Adv_Mutex_Type with private;
function Create return Soft_Links.Adv_Mutex_Access;
procedure Enter (M : in out Protected_Adv_Mutex_Type);
procedure Destroy (M : in out Protected_Adv_Mutex_Type);
procedure Leave (M : in out Protected_Adv_Mutex_Type);
function Is_Environment_Task return Boolean;
function Env_Task_Awake_Count return Natural;
function Independent_Task_Count return Natural;
procedure List_Tasks;
function Get_Priority return Natural;
procedure Set_Priority (P : Natural);
-- function Get_Task_Stamp return Float;
-- procedure Set_Task_Stamp (S : Float);
-- We export Mutex_PO because the abortable part of a select ...
-- then abort construct must be an entry call.
protected type Mutex_PO is
entry Enter;
procedure Leave;
function Is_Held return Boolean;
private
Held : Boolean := False;
end Mutex_PO;
type Mutex_PO_Access is access Mutex_PO;
procedure Free is
new Ada.Unchecked_Deallocation (Mutex_PO, Mutex_PO_Access);
private
type Protected_Mutex_Type is new Soft_Links.Mutex_Type
with record
X : Mutex_PO_Access;
end record;
protected type Watcher_PO is
procedure Update;
entry Differ (From : Types.Version_Id);
function Lookup return Types.Version_Id;
procedure Init (Initial_Value : Types.Version_Id);
private
entry Wait_For_Update (From : Types.Version_Id);
Value : Types.Version_Id;
Updated : Boolean := False;
end Watcher_PO;
type Protected_Watcher_Type is new Soft_Links.Watcher_Type with record
P : Watcher_PO;
end record;
protected type Clever_Lock is
entry Lock;
entry Unlock;
-- This entry could be a procedure, but we want the Task_Id of the
-- caller for debugging purpose.
private
entry Contention;
Count : Natural := 0;
Owner : Ada.Task_Identification.Task_Id;
end Clever_Lock;
type Protected_Adv_Mutex_Type is new Soft_Links.Adv_Mutex_Type
with record
X : Clever_Lock;
end record;
end System.Garlic.Tasking;
|