1 /* Task group 2 3 Copyright (C) 2023-2024 Free Software Foundation, Inc. 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 */ 62