|
111
|
1 ------------------------------------------------------------------------------
|
|
|
2 -- --
|
|
|
3 -- GNAT RUN-TIME COMPONENTS --
|
|
|
4 -- --
|
|
|
5 -- A D A . S Y N C H R O N O U S _ T A S K _ C O N T R O L --
|
|
|
6 -- --
|
|
|
7 -- S p e c --
|
|
|
8 -- --
|
|
131
|
9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
|
|
111
|
10 -- --
|
|
|
11 -- This specification is derived from the Ada Reference Manual for use with --
|
|
|
12 -- GNAT. The copyright notice above, and the license provisions that follow --
|
|
|
13 -- apply solely to the contents of the part following the private keyword. --
|
|
|
14 -- --
|
|
|
15 -- GNAT is free software; you can redistribute it and/or modify it under --
|
|
|
16 -- terms of the GNU General Public License as published by the Free Soft- --
|
|
|
17 -- ware Foundation; either version 3, or (at your option) any later ver- --
|
|
|
18 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
|
|
|
19 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
|
|
|
20 -- or FITNESS FOR A PARTICULAR PURPOSE. --
|
|
|
21 -- --
|
|
|
22 -- As a special exception under Section 7 of GPL version 3, you are granted --
|
|
|
23 -- additional permissions described in the GCC Runtime Library Exception, --
|
|
|
24 -- version 3.1, as published by the Free Software Foundation. --
|
|
|
25 -- --
|
|
|
26 -- You should have received a copy of the GNU General Public License and --
|
|
|
27 -- a copy of the GCC Runtime Library Exception along with this program; --
|
|
|
28 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
|
|
|
29 -- <http://www.gnu.org/licenses/>. --
|
|
|
30 -- --
|
|
|
31 -- GNAT was originally developed by the GNAT team at New York University. --
|
|
|
32 -- Extensive contributions were provided by Ada Core Technologies Inc. --
|
|
|
33 -- --
|
|
|
34 ------------------------------------------------------------------------------
|
|
|
35
|
|
|
36 with System.Task_Primitives;
|
|
|
37
|
|
|
38 with Ada.Finalization;
|
|
|
39 with Ada.Task_Identification;
|
|
|
40
|
|
|
41 package Ada.Synchronous_Task_Control with
|
|
|
42 SPARK_Mode
|
|
|
43 is
|
|
|
44 pragma Preelaborate;
|
|
|
45 -- In accordance with Ada 2005 AI-362
|
|
|
46
|
|
|
47 type Suspension_Object is limited private with
|
|
|
48 Default_Initial_Condition;
|
|
|
49
|
|
|
50 procedure Set_True (S : in out Suspension_Object) with
|
|
|
51 Global => null,
|
|
|
52 Depends => (S => null,
|
|
|
53 null => S);
|
|
|
54
|
|
|
55 procedure Set_False (S : in out Suspension_Object) with
|
|
|
56 Global => null,
|
|
|
57 Depends => (S => null,
|
|
|
58 null => S);
|
|
|
59
|
|
|
60 function Current_State (S : Suspension_Object) return Boolean with
|
|
|
61 Volatile_Function,
|
|
|
62 Global => Ada.Task_Identification.Tasking_State;
|
|
|
63
|
|
|
64 procedure Suspend_Until_True (S : in out Suspension_Object) with
|
|
|
65 Global => null,
|
|
|
66 Depends => (S => null,
|
|
|
67 null => S);
|
|
|
68
|
|
|
69 private
|
|
|
70 pragma SPARK_Mode (Off);
|
|
|
71
|
|
|
72 procedure Initialize (S : in out Suspension_Object);
|
|
|
73 -- Initialization for Suspension_Object
|
|
|
74
|
|
|
75 procedure Finalize (S : in out Suspension_Object);
|
|
|
76 -- Finalization for Suspension_Object
|
|
|
77
|
|
|
78 type Suspension_Object is
|
|
|
79 new Ada.Finalization.Limited_Controlled with
|
|
|
80 record
|
|
|
81 SO : System.Task_Primitives.Suspension_Object;
|
|
|
82 -- Use low-level suspension objects so that the synchronization
|
|
|
83 -- functionality provided by this object can be achieved using
|
|
|
84 -- efficient operating system primitives.
|
|
|
85 end record;
|
|
|
86
|
|
|
87 pragma Inline (Set_True);
|
|
|
88 pragma Inline (Set_False);
|
|
|
89 pragma Inline (Current_State);
|
|
|
90 pragma Inline (Suspend_Until_True);
|
|
|
91 pragma Inline (Initialize);
|
|
|
92 pragma Inline (Finalize);
|
|
|
93
|
|
|
94 end Ada.Synchronous_Task_Control;
|
