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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/>. */
#include "common-defs.h"
#include "task-group.h"
#include "thread-pool.h"
namespace gdb
{
class task_group::impl : public std::enable_shared_from_this<task_group::impl>
{
public:
explicit impl (std::function<void ()> &&done)
: m_done (std::move (done))
{ }
DISABLE_COPY_AND_ASSIGN (impl);
~impl ()
{
if (m_started)
m_done ();
}
/* Add a task to the task group. */
void add_task (std::function<void ()> &&task)
{
m_tasks.push_back (std::move (task));
};
/* Start this task group. */
void start ();
/* True if started. */
bool m_started = false;
/* The tasks. */
std::vector<std::function<void ()>> m_tasks;
/* The 'done' function. */
std::function<void ()> m_done;
};
void
task_group::impl::start ()
{
std::shared_ptr<impl> shared_this = shared_from_this ();
m_started = true;
for (size_t i = 0; i < m_tasks.size (); ++i)
{
gdb::thread_pool::g_thread_pool->post_task ([=] ()
{
/* Be sure to capture a shared reference here. */
shared_this->m_tasks[i] ();
});
}
}
task_group::task_group (std::function<void ()> &&done)
: m_task (new impl (std::move (done)))
{
}
void
task_group::add_task (std::function<void ()> &&task)
{
gdb_assert (m_task != nullptr);
m_task->add_task (std::move (task));
}
void
task_group::start ()
{
gdb_assert (m_task != nullptr);
m_task->start ();
m_task.reset ();
}
} /* namespace gdb */
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