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1d506c26 | 1 | -- Copyright 2011-2024 Free Software Foundation, Inc. |
f7e44f65 JB |
2 | -- |
3 | -- This program is free software; you can redistribute it and/or modify | |
4 | -- it under the terms of the GNU General Public License as published by | |
5 | -- the Free Software Foundation; either version 3 of the License, or | |
6 | -- (at your option) any later version. | |
7 | -- | |
8 | -- This program is distributed in the hope that it will be useful, | |
9 | -- but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | -- GNU General Public License for more details. | |
12 | -- | |
13 | -- You should have received a copy of the GNU General Public License | |
14 | -- along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | ||
16 | procedure Task_Switch is | |
17 | ||
18 | ------------------- | |
19 | -- Declaractions -- | |
20 | ------------------- | |
21 | ||
22 | task type Callee is | |
23 | entry Finito; | |
24 | end Callee; | |
25 | type Callee_Ptr is access Callee; | |
26 | ||
27 | task type Caller is | |
28 | end Caller; | |
29 | type Caller_Ptr is access Caller; | |
30 | ||
31 | procedure Break_Me; | |
32 | ||
33 | My_Caller : Caller_Ptr; | |
34 | My_Callee : Callee_Ptr; | |
35 | ||
36 | ------------ | |
37 | -- Bodies -- | |
38 | ------------ | |
39 | ||
40 | task body Callee is | |
41 | begin | |
42 | -- Just wait until we are told to terminate this task. | |
43 | -- This is just to maintain this task alive. | |
44 | accept Finito do | |
45 | null; | |
46 | end Finito; | |
47 | end Callee; | |
48 | ||
49 | task body Caller is | |
50 | begin | |
51 | Break_Me; | |
52 | My_Callee.Finito; | |
53 | end Caller; | |
54 | ||
55 | procedure Break_Me is | |
56 | begin | |
57 | null; | |
58 | end Break_Me; | |
59 | ||
60 | begin | |
61 | ||
62 | -- Make sure to create the Callee task first... And then give it | |
63 | -- enough time to complete its activation phase before we start | |
64 | -- the Caller task. | |
65 | My_Callee := new Callee; | |
66 | delay 0.1; | |
67 | ||
68 | My_Caller := new Caller; | |
69 | ||
70 | end Task_Switch; |