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-rw-r--r--thirdparty/spdlog/details/thread_pool.h121
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diff --git a/thirdparty/spdlog/details/thread_pool.h b/thirdparty/spdlog/details/thread_pool.h
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+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include <spdlog/details/log_msg_buffer.h>
+#include <spdlog/details/mpmc_blocking_q.h>
+#include <spdlog/details/os.h>
+
+#include <chrono>
+#include <memory>
+#include <thread>
+#include <vector>
+#include <functional>
+
+namespace spdlog {
+class async_logger;
+
+namespace details {
+
+using async_logger_ptr = std::shared_ptr<spdlog::async_logger>;
+
+enum class async_msg_type
+{
+ log,
+ flush,
+ terminate
+};
+
+#include <spdlog/details/log_msg_buffer.h>
+// Async msg to move to/from the queue
+// Movable only. should never be copied
+struct async_msg : log_msg_buffer
+{
+ async_msg_type msg_type{async_msg_type::log};
+ async_logger_ptr worker_ptr;
+
+ async_msg() = default;
+ ~async_msg() = default;
+
+ // should only be moved in or out of the queue..
+ async_msg(const async_msg &) = delete;
+
+// support for vs2013 move
+#if defined(_MSC_VER) && _MSC_VER <= 1800
+ async_msg(async_msg &&other)
+ : log_msg_buffer(std::move(other))
+ , msg_type(other.msg_type)
+ , worker_ptr(std::move(other.worker_ptr))
+ {}
+
+ async_msg &operator=(async_msg &&other)
+ {
+ *static_cast<log_msg_buffer *>(this) = std::move(other);
+ msg_type = other.msg_type;
+ worker_ptr = std::move(other.worker_ptr);
+ return *this;
+ }
+#else // (_MSC_VER) && _MSC_VER <= 1800
+ async_msg(async_msg &&) = default;
+ async_msg &operator=(async_msg &&) = default;
+#endif
+
+ // construct from log_msg with given type
+ async_msg(async_logger_ptr &&worker, async_msg_type the_type, const details::log_msg &m)
+ : log_msg_buffer{m}
+ , msg_type{the_type}
+ , worker_ptr{std::move(worker)}
+ {}
+
+ async_msg(async_logger_ptr &&worker, async_msg_type the_type)
+ : log_msg_buffer{}
+ , msg_type{the_type}
+ , worker_ptr{std::move(worker)}
+ {}
+
+ explicit async_msg(async_msg_type the_type)
+ : async_msg{nullptr, the_type}
+ {}
+};
+
+class SPDLOG_API thread_pool
+{
+public:
+ using item_type = async_msg;
+ using q_type = details::mpmc_blocking_queue<item_type>;
+
+ thread_pool(size_t q_max_items, size_t threads_n, std::function<void()> on_thread_start);
+ thread_pool(size_t q_max_items, size_t threads_n);
+
+ // message all threads to terminate gracefully join them
+ ~thread_pool();
+
+ thread_pool(const thread_pool &) = delete;
+ thread_pool &operator=(thread_pool &&) = delete;
+
+ void post_log(async_logger_ptr &&worker_ptr, const details::log_msg &msg, async_overflow_policy overflow_policy);
+ void post_flush(async_logger_ptr &&worker_ptr, async_overflow_policy overflow_policy);
+ size_t overrun_counter();
+ size_t queue_size();
+
+private:
+ q_type q_;
+
+ std::vector<std::thread> threads_;
+
+ void post_async_msg_(async_msg &&new_msg, async_overflow_policy overflow_policy);
+ void worker_loop_();
+
+ // process next message in the queue
+ // return true if this thread should still be active (while no terminate msg
+ // was received)
+ bool process_next_msg_();
+};
+
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "thread_pool-inl.h"
+#endif