106 lines
2.8 KiB
C++
106 lines
2.8 KiB
C++
#pragma once
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/*
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* Copyright (C) 2024 Brett Terpstra
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef BLT_GP_THREADING_H
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#define BLT_GP_THREADING_H
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#include <blt/std/types.h>
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#include <blt/std/thread.h>
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#include <thread>
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#include <functional>
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#include <atomic>
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namespace blt::gp
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{
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template <typename Parallel, typename Single = void>
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class task_t
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{
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public:
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task_t(Parallel parallel, Single single): parallel(parallel), single(single), requires_single_sync(true)
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{
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}
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explicit task_t(Parallel parallel): parallel(parallel), requires_single_sync(false)
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{
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}
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void call_parallel(size_t thread_index)
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{
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parallel(thread_index);
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}
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void call_single()
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{
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single();
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}
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private:
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Parallel parallel;
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Single single;
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bool explicit_sync_begin : 1 = true;
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bool explicit_sync_end : 1 = true;
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bool requires_single_sync : 1 = false;
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};
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template <typename... Tasks>
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class task_storage_t
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{
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};
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class thread_manager_t
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{
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public:
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explicit thread_manager_t(const size_t thread_count, const bool will_main_block = true): barrier(thread_count),
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will_main_block(will_main_block)
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{
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for (size_t i = 0; i < will_main_block ? thread_count - 1 : thread_count; ++i)
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{
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threads.emplace_back([i, this]()
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{
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while (should_run)
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{
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}
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});
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}
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}
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~thread_manager()
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{
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should_run = false;
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for (auto& thread : threads)
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{
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if (thread.joinable())
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thread.join();
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}
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}
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private:
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[[nodiscard]] size_t thread_count() const
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{
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return will_main_block ? threads.size() + 1 : threads.size();
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}
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barrier barrier;
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std::atomic_bool should_run = true;
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bool will_main_block;
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std::vector<size_t> tasks;
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std::vector<std::thread> threads;
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};
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}
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#endif //BLT_GP_THREADING_H
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