1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- G N A T . T H R E A D S --
-- --
-- B o d y --
-- --
-- Copyright (C) 1998-2003 Ada Core Technologies, Inc. --
-- --
-- GNAT 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. 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Task_Identification; use Ada.Task_Identification;
with System.Task_Primitives.Operations;
with System.Tasking;
with System.Tasking.Stages; use System.Tasking.Stages;
with System.OS_Interface; use System.OS_Interface;
with System.Soft_Links; use System.Soft_Links;
with Unchecked_Conversion;
package body GNAT.Threads is
use System;
package STPO renames System.Task_Primitives.Operations;
type Thread_Id_Ptr is access all Thread_Id;
function To_Addr is new Unchecked_Conversion (Task_Id, Address);
function To_Id is new Unchecked_Conversion (Address, Task_Id);
function To_Id is new Unchecked_Conversion (Address, Tasking.Task_ID);
function To_Tid is new Unchecked_Conversion
(Address, Ada.Task_Identification.Task_Id);
function To_Thread is new Unchecked_Conversion (Address, Thread_Id_Ptr);
type Code_Proc is access procedure (Id : Address; Parm : Void_Ptr);
task type Thread
(Stsz : Natural;
Prio : Any_Priority;
Parm : Void_Ptr;
Code : Code_Proc)
is
pragma Priority (Prio);
pragma Storage_Size (Stsz);
end Thread;
task body Thread is
begin
Code.all (To_Addr (Current_Task), Parm);
end Thread;
type Tptr is access Thread;
-------------------
-- Create_Thread --
-------------------
function Create_Thread
(Code : Address;
Parm : Void_Ptr;
Size : Natural;
Prio : Integer)
return System.Address
is
TP : Tptr;
function To_CP is new Unchecked_Conversion (Address, Code_Proc);
begin
TP := new Thread (Size, Prio, Parm, To_CP (Code));
return To_Addr (TP'Identity);
end Create_Thread;
---------------------
-- Register_Thread --
---------------------
function Register_Thread return System.Address is
begin
return Task_Primitives.Operations.Register_Foreign_Thread.all'Address;
end Register_Thread;
-----------------------
-- Unregister_Thread --
-----------------------
procedure Unregister_Thread is
Self_Id : constant Tasking.Task_ID := Task_Primitives.Operations.Self;
begin
Self_Id.Common.State := Tasking.Terminated;
Destroy_TSD (Self_Id.Common.Compiler_Data);
Free_Task (Self_Id);
end Unregister_Thread;
--------------------------
-- Unregister_Thread_Id --
--------------------------
procedure Unregister_Thread_Id (Thread : System.Address) is
Thr : constant Thread_Id := To_Thread (Thread).all;
T : Tasking.Task_ID;
use type Tasking.Task_ID;
begin
STPO.Lock_RTS;
T := Tasking.All_Tasks_List;
loop
exit when T = null or else STPO.Get_Thread_Id (T) = Thr;
T := T.Common.All_Tasks_Link;
end loop;
STPO.Unlock_RTS;
if T /= null then
T.Common.State := Tasking.Terminated;
Destroy_TSD (T.Common.Compiler_Data);
Free_Task (T);
end if;
end Unregister_Thread_Id;
--------------------
-- Destroy_Thread --
--------------------
procedure Destroy_Thread (Id : Address) is
Tid : constant Task_Id := To_Id (Id);
begin
Abort_Task (Tid);
end Destroy_Thread;
----------------
-- Get_Thread --
----------------
procedure Get_Thread (Id : Address; Thread : Address) is
use System.OS_Interface;
Thr : Thread_Id_Ptr := To_Thread (Thread);
begin
Thr.all := Task_Primitives.Operations.Get_Thread_Id (To_Id (Id));
end Get_Thread;
----------------
-- To_Task_Id --
----------------
function To_Task_Id
(Id : System.Address)
return Ada.Task_Identification.Task_Id
is
begin
return To_Tid (Id);
end To_Task_Id;
end GNAT.Threads;
|
