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/* Task group
Copyright (C) 2023 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT 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
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef GDBSUPPORT_TASK_GROUP_H
#define GDBSUPPORT_TASK_GROUP_H
#include <memory>
namespace gdb
{
/* A task group is a collection of tasks. Each task in the group is
submitted to the thread pool. When all the tasks in the group have
finished, a final action is run. */
class task_group
{
public:
explicit task_group (std::function<void ()> &&done);
DISABLE_COPY_AND_ASSIGN (task_group);
/* Add a task to the task group. All tasks must be added before the
group is started. Note that a task may not throw an
exception. */
void add_task (std::function<void ()> &&task);
/* Start this task group. A task group may only be started once.
This will submit all the tasks to the global thread pool. */
void start ();
private:
class impl;
/* A task group is just a facade around an impl. This is done
because the impl object must live as long as its longest-lived
task, so it is heap-allocated and destroyed when the last task
completes. */
std::shared_ptr<impl> m_task;
};
} /* namespace gdb */
#endif /* GDBSUPPORT_TASK_GROUP_H */
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