Async.h

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// Copyright 2024 libsese
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
 
#pragma once
 
#include <sese/thread/GlobalThreadPool.h>
 
namespace sese {
 
template<class RETURN_TYPE>
std::shared_future<RETURN_TYPE> async(const std::function<RETURN_TYPE()> &task) noexcept;
 
template<class RETURN_TYPE>
std::shared_future<RETURN_TYPE> async(ThreadPool &pool, const std::function<RETURN_TYPE()> &task) noexcept;
 
template<class RETURN_TYPE>
std::shared_future<RETURN_TYPE> asyncWithGlobalPool(const std::function<RETURN_TYPE()> &task) noexcept;
 
} // namespace sese
 
template<class RETURN_TYPE>
std::shared_future<RETURN_TYPE> sese::async(const std::function<RETURN_TYPE()> &task) noexcept {
    std::packaged_task<RETURN_TYPE()> packaged_task(task);
    std::shared_future<RETURN_TYPE> future(packaged_task.get_future());
 
    std::thread(
            [&](std::packaged_task<RETURN_TYPE()> task) {
                task();
            },
            std::move(packaged_task)
    )
            .detach();
 
    return future;
}
 
template<class RETURN_TYPE>
std::shared_future<RETURN_TYPE> sese::async(ThreadPool &pool, const std::function<RETURN_TYPE()> &task) noexcept {
    return pool.postTask<RETURN_TYPE>(task);
}
 
template<class RETURN_TYPE>
std::shared_future<RETURN_TYPE> sese::asyncWithGlobalPool(const std::function<RETURN_TYPE()> &task) noexcept {
    return sese::GlobalThreadPool::postTask<RETURN_TYPE>(task);
}