Class ringbuffer_sink

Synopsis

#include <include/spdlog/sinks/ringbuffer_sink.h>

template<typename Mutex>
class ringbuffer_sink final : public base_sink<Mutex>

Description

Ring buffer sink

Inheritance

Ancestors: base_sink

Methods

ringbuffer_sink
flush_
last_formatted
last_raw
sink_it_

Source

Lines 20-67 in include/spdlog/sinks/ringbuffer_sink.h.

template<typename Mutex>
class ringbuffer_sink final : public base_sink<Mutex>
{
public:
    explicit ringbuffer_sink(size_t n_items)
        : q_{n_items}
    {}

    std::vector<details::log_msg_buffer> last_raw(size_t lim = 0)
    {
        std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
        auto items_available = q_.size();
        auto n_items = lim > 0 ? (std::min)(lim, items_available) : items_available;
        std::vector<details::log_msg_buffer> ret;
        ret.reserve(n_items);
        for (size_t i = (items_available - n_items); i < items_available; i++)
        {
            ret.push_back(q_.at(i));
        }
        return ret;
    }

    std::vector<std::string> last_formatted(size_t lim = 0)
    {
        std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
        auto items_available = q_.size();
        auto n_items = lim > 0 ? (std::min)(lim, items_available) : items_available;
        std::vector<std::string> ret;
        ret.reserve(n_items);
        for (size_t i = (items_available - n_items); i < items_available; i++)
        {
            memory_buf_t formatted;
            base_sink<Mutex>::formatter_->format(q_.at(i), formatted);
            ret.push_back(fmt::to_string(formatted));
        }
        return ret;
    }

protected:
    void sink_it_(const details::log_msg &msg) override
    {
        q_.push_back(details::log_msg_buffer{msg});
    }
    void flush_() override {}

private:
    details::circular_q<details::log_msg_buffer> q_;
};





Add Discussion

Log in to comment