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542e23ff TT |
1 | /* Task group |
2 | ||
1d506c26 | 3 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
542e23ff TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #ifndef GDBSUPPORT_TASK_GROUP_H | |
21 | #define GDBSUPPORT_TASK_GROUP_H | |
22 | ||
23 | #include <memory> | |
24 | ||
25 | namespace gdb | |
26 | { | |
27 | ||
28 | /* A task group is a collection of tasks. Each task in the group is | |
29 | submitted to the thread pool. When all the tasks in the group have | |
30 | finished, a final action is run. */ | |
31 | ||
32 | class task_group | |
33 | { | |
34 | public: | |
35 | ||
36 | explicit task_group (std::function<void ()> &&done); | |
37 | DISABLE_COPY_AND_ASSIGN (task_group); | |
38 | ||
39 | /* Add a task to the task group. All tasks must be added before the | |
40 | group is started. Note that a task may not throw an | |
41 | exception. */ | |
42 | void add_task (std::function<void ()> &&task); | |
43 | ||
44 | /* Start this task group. A task group may only be started once. | |
45 | This will submit all the tasks to the global thread pool. */ | |
46 | void start (); | |
47 | ||
48 | private: | |
49 | ||
50 | class impl; | |
51 | ||
52 | /* A task group is just a facade around an impl. This is done | |
53 | because the impl object must live as long as its longest-lived | |
54 | task, so it is heap-allocated and destroyed when the last task | |
55 | completes. */ | |
56 | std::shared_ptr<impl> m_task; | |
57 | }; | |
58 | ||
59 | } /* namespace gdb */ | |
60 | ||
61 | #endif /* GDBSUPPORT_TASK_GROUP_H */ |