rocksdb/port/win/win_logger.h

//  Copyright (c) 2013, Facebook, Inc.  All rights reserved.
//  This source code is licensed under the BSD-style license found in the
//  LICENSE file in the root directory of this source tree. An additional grant
//  of patent rights can be found in the PATENTS file in the same directory.
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
//
// Logger implementation that can be shared by all environments
// where enough posix functionality is available.

#pragma once

#include <atomic>

#include "rocksdb/env.h"

namespace rocksdb {

class Env;

const int kDebugLogChunkSize = 128 * 1024;

class WinLogger : public rocksdb::Logger {
private:
    FILE*                     file_;
    uint64_t                  (*gettid_)();  // Return the thread id for the current thread
    std::atomic_size_t        log_size_;
    std::atomic_uint_fast64_t last_flush_micros_;
    Env*                      env_;
    bool                      flush_pending_;

    const static uint64_t flush_every_seconds_ = 5;

public:
    WinLogger(uint64_t(*gettid)(), Env* env, FILE * file, const InfoLogLevel log_level = InfoLogLevel::ERROR_LEVEL);

    virtual ~WinLogger();

    void close();

    void Flush() override;

    void Logv(const char* format, va_list ap) override;

    size_t GetLogFileSize() const override;

    void DebugWriter(const char* str, int len);
};

}  // namespace rocksdb