73 lines
1.6 KiB
C++
73 lines
1.6 KiB
C++
/*
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* Copyright (c) 2016-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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*/
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#pragma once
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#include <cstdio>
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#include <mutex>
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namespace pzstd {
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constexpr int kLogError = 1;
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constexpr int kLogInfo = 2;
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constexpr int kLogDebug = 3;
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constexpr int kLogVerbose = 4;
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class Logger {
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std::mutex mutex_;
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FILE* out_;
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const int level_;
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using Clock = std::chrono::system_clock;
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Clock::time_point lastUpdate_;
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std::chrono::milliseconds refreshRate_;
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public:
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explicit Logger(int level, FILE* out = stderr)
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: out_(out), level_(level), lastUpdate_(Clock::now()),
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refreshRate_(150) {}
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bool logsAt(int level) {
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return level <= level_;
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}
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template <typename... Args>
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void operator()(int level, const char *fmt, Args... args) {
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if (level > level_) {
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return;
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}
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std::lock_guard<std::mutex> lock(mutex_);
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std::fprintf(out_, fmt, args...);
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}
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template <typename... Args>
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void update(int level, const char *fmt, Args... args) {
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if (level > level_) {
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return;
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}
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std::lock_guard<std::mutex> lock(mutex_);
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auto now = Clock::now();
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if (now - lastUpdate_ > refreshRate_) {
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lastUpdate_ = now;
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std::fprintf(out_, "\r");
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std::fprintf(out_, fmt, args...);
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}
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}
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void clear(int level) {
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if (level > level_) {
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return;
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}
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std::lock_guard<std::mutex> lock(mutex_);
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std::fprintf(out_, "\r%79s\r", "");
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}
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};
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}
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