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Diffstat (limited to 'matching/include/spdlog/async_logger.h')
-rw-r--r-- | matching/include/spdlog/async_logger.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/matching/include/spdlog/async_logger.h b/matching/include/spdlog/async_logger.h new file mode 100644 index 0000000..a7ecb78 --- /dev/null +++ b/matching/include/spdlog/async_logger.h @@ -0,0 +1,73 @@ +// +// Copyright(c) 2015 Gabi Melman. +// Distributed under the MIT License (http://opensource.org/licenses/MIT) +// + +#pragma once + +// Very fast asynchronous logger (millions of logs per second on an average +// desktop) +// Uses pre allocated lockfree queue for maximum throughput even under large +// number of threads. +// Creates a single back thread to pop messages from the queue and log them. +// +// Upon each log write the logger: +// 1. Checks if its log level is enough to log the message +// 2. Push a new copy of the message to a queue (or block the caller until +// space is available in the queue) +// 3. will throw spdlog_ex upon log exceptions +// Upon destruction, logs all remaining messages in the queue before +// destructing.. + +#include "spdlog/common.h" +#include "spdlog/logger.h" + +#include <chrono> +#include <memory> +#include <string> + +namespace spdlog { + +// Async overflow policy - block by default. +enum class async_overflow_policy +{ + block, // Block until message can be enqueued + overrun_oldest // Discard oldest message in the queue if full when trying to + // add new item. +}; + +namespace details { +class thread_pool; +} + +class async_logger final : public std::enable_shared_from_this<async_logger>, public logger +{ + friend class details::thread_pool; + +public: + template<typename It> + async_logger(std::string logger_name, It begin, It end, std::weak_ptr<details::thread_pool> tp, + async_overflow_policy overflow_policy = async_overflow_policy::block); + + async_logger(std::string logger_name, sinks_init_list sinks_list, std::weak_ptr<details::thread_pool> tp, + async_overflow_policy overflow_policy = async_overflow_policy::block); + + async_logger(std::string logger_name, sink_ptr single_sink, std::weak_ptr<details::thread_pool> tp, + async_overflow_policy overflow_policy = async_overflow_policy::block); + + std::shared_ptr<logger> clone(std::string new_name) override; + +protected: + void sink_it_(details::log_msg &msg) override; + void flush_() override; + + void backend_log_(const details::log_msg &incoming_log_msg); + void backend_flush_(); + +private: + std::weak_ptr<details::thread_pool> thread_pool_; + async_overflow_policy overflow_policy_; +}; +} // namespace spdlog + +#include "details/async_logger_impl.h" |