68 lines
2.0 KiB
C++
68 lines
2.0 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/details/circular_q.h"
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#include "spdlog/details/log_msg_buffer.h"
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#include "spdlog/details/null_mutex.h"
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#include "spdlog/sinks/base_sink.h"
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#include <mutex>
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#include <string>
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#include <vector>
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namespace spdlog {
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namespace sinks {
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/*
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* Ring buffer sink
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*/
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template <typename Mutex>
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class ringbuffer_sink final : public base_sink<Mutex> {
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public:
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explicit ringbuffer_sink(size_t n_items)
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: q_{n_items} {}
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std::vector<details::log_msg_buffer> last_raw(size_t lim = 0) {
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std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
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auto items_available = q_.size();
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auto n_items = lim > 0 ? (std::min)(lim, items_available) : items_available;
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std::vector<details::log_msg_buffer> ret;
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ret.reserve(n_items);
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for (size_t i = (items_available - n_items); i < items_available; i++) {
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ret.push_back(q_.at(i));
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}
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return ret;
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}
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std::vector<std::string> last_formatted(size_t lim = 0) {
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std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
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auto items_available = q_.size();
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auto n_items = lim > 0 ? (std::min)(lim, items_available) : items_available;
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std::vector<std::string> ret;
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ret.reserve(n_items);
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for (size_t i = (items_available - n_items); i < items_available; i++) {
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memory_buf_t formatted;
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base_sink<Mutex>::formatter_->format(q_.at(i), formatted);
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ret.push_back(SPDLOG_BUF_TO_STRING(formatted));
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}
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return ret;
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}
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protected:
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void sink_it_(const details::log_msg &msg) override {
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q_.push_back(details::log_msg_buffer{msg});
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}
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void flush_() override {}
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private:
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details::circular_q<details::log_msg_buffer> q_;
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};
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using ringbuffer_sink_mt = ringbuffer_sink<std::mutex>;
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using ringbuffer_sink_st = ringbuffer_sink<details::null_mutex>;
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} // namespace sinks
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} // namespace spdlog
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