// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.

// Distributed under the MIT License (http://opensource.org/licenses/MIT)

#pragma once

#include <spdlog/details/circular_q.h>

#include <spdlog/details/log_msg_buffer.h>

#include <atomic>

#include <functional>

#include <mutex>

// Store log messages in circular buffer.

// Useful for storing debug data in case of error/warning happens.

namespace spdlog {

namespace details {

class SPDLOG_API backtracer {

    mutable std::mutex mutex_;

    std::atomic<bool> enabled_{false};

    circular_q<log_msg_buffer> messages_;

public:

    backtracer() = default;

    backtracer(const backtracer &other);

    backtracer(backtracer &&other) SPDLOG_NOEXCEPT;

    backtracer &operator=(backtracer other);

    void enable(size_t size);

    void disable();

    bool enabled() const;

    void push_back(const log_msg &msg);

    bool empty() const;

    // pop all items in the q and apply the given fun on each of them.

    void foreach_pop(std::function<void(const details::log_msg &)> fun);

};

}  // namespace details

}  // namespace spdlog

#ifdef SPDLOG_HEADER_ONLY

    #include "backtracer-inl.h"

#endif