/**
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* Copyright FunASR (https://github.com/alibaba-damo-academy/FunASR). All Rights
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* Reserved. MIT License (https://opensource.org/licenses/MIT)
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*/
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/* 2023-2024 by zhaomingwork@qq.com */
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//
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// io_context_pool.cpp
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// ~~~~~~~~~~~~~~~~~~~
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// copy some codes from http://www.boost.org/
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#include "io_context_pool.hpp"
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#include <stdexcept>
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#include <thread>
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namespace http {
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namespace server2 {
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io_context_pool::io_context_pool(std::size_t pool_size)
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: next_io_context_(0)
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{
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if (pool_size == 0)
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throw std::runtime_error("io_context_pool size is 0");
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// Give all the io_contexts work to do so that their run() functions will not
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// exit until they are explicitly stopped.
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for (std::size_t i = 0; i < pool_size; ++i)
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{
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io_context_ptr io_context(new asio::io_context);
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io_contexts_.push_back(io_context);
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work_.push_back(asio::make_work_guard(*io_context));
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}
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}
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void io_context_pool::run()
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{
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// Create a pool of threads to run all of the io_contexts.
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std::vector<std::thread> threads;
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for (std::size_t i = 0; i < io_contexts_.size(); ++i)
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threads.emplace_back([this, i]{ io_contexts_[i]->run(); });
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// Wait for all threads in the pool to exit.
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for (std::size_t i = 0; i < threads.size(); ++i)
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threads[i].join();
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}
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void io_context_pool::stop()
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{
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// Explicitly stop all io_contexts.
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for (std::size_t i = 0; i < io_contexts_.size(); ++i)
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io_contexts_[i]->stop();
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}
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asio::io_context& io_context_pool::get_io_context()
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{
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// Use a round-robin scheme to choose the next io_context to use.
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asio::io_context& io_context = *io_contexts_[next_io_context_];
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++next_io_context_;
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if (next_io_context_ == io_contexts_.size())
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next_io_context_ = 0;
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return io_context;
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}
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} // namespace server2
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} // namespace http
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