113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
// Copyright(c) 2015-present Gabi Melman & spdlog contributors.
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// Distributed under the MIT License (http://opensource.org/licenses/MIT)
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#pragma once
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#include "spdlog/common.h"
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namespace spdlog {
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namespace details {
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SPDLOG_INLINE thread_pool::thread_pool(size_t q_max_items, size_t threads_n)
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: q_(q_max_items)
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{
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if (threads_n == 0 || threads_n > 1000)
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{
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throw spdlog_ex("spdlog::thread_pool(): invalid threads_n param (valid "
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"range is 1-1000)");
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}
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for (size_t i = 0; i < threads_n; i++)
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{
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threads_.emplace_back(&thread_pool::worker_loop_, this);
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}
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}
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// message all threads to terminate gracefully join them
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SPDLOG_INLINE thread_pool::~thread_pool()
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{
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try
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{
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for (size_t i = 0; i < threads_.size(); i++)
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{
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post_async_msg_(async_msg(async_msg_type::terminate), async_overflow_policy::block);
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}
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for (auto &t : threads_)
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{
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t.join();
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}
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}
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catch (...)
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{}
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}
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void SPDLOG_INLINE thread_pool::post_log(async_logger_ptr &&worker_ptr, details::log_msg &msg, async_overflow_policy overflow_policy)
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{
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async_msg async_m(std::move(worker_ptr), async_msg_type::log, msg);
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post_async_msg_(std::move(async_m), overflow_policy);
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}
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void SPDLOG_INLINE thread_pool::post_flush(async_logger_ptr &&worker_ptr, async_overflow_policy overflow_policy)
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{
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post_async_msg_(async_msg(std::move(worker_ptr), async_msg_type::flush), overflow_policy);
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}
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size_t SPDLOG_INLINE thread_pool::overrun_counter()
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{
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return q_.overrun_counter();
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}
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void SPDLOG_INLINE thread_pool::post_async_msg_(async_msg &&new_msg, async_overflow_policy overflow_policy)
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{
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if (overflow_policy == async_overflow_policy::block)
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{
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q_.enqueue(std::move(new_msg));
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}
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else
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{
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q_.enqueue_nowait(std::move(new_msg));
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}
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}
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void SPDLOG_INLINE thread_pool::worker_loop_()
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{
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while (process_next_msg_()) {};
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}
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// process next message in the queue
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// return true if this thread should still be active (while no terminate msg
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// was received)
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bool SPDLOG_INLINE thread_pool::process_next_msg_()
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{
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async_msg incoming_async_msg;
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bool dequeued = q_.dequeue_for(incoming_async_msg, std::chrono::seconds(10));
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if (!dequeued)
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{
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return true;
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}
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switch (incoming_async_msg.msg_type)
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{
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case async_msg_type::log:
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{
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auto msg = incoming_async_msg.to_log_msg();
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incoming_async_msg.worker_ptr->backend_log_(msg);
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return true;
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}
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case async_msg_type::flush:
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{
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incoming_async_msg.worker_ptr->backend_flush_();
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return true;
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}
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case async_msg_type::terminate:
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{
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return false;
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}
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}
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assert(false && "Unexpected async_msg_type");
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return true;
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}
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} // namespace details
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} // namespace spdlog
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