1 /*
   2  * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_JFR_UTILITIES_JFRVMLOG_HPP
  26 #define SHARE_VM_JFR_UTILITIES_JFRVMLOG_HPP
  27 
  28 #include "runtime/os.hpp"
  29 #include "utilities/debug.hpp"
  30 
  31 #define log_error(...)     (!log_is_enabled(Error, __VA_ARGS__))    ? (void)0 : tty->print_cr
  32 #define log_warning(...)   (!log_is_enabled(Warning, __VA_ARGS__))  ? (void)0 : tty->print_cr
  33 #define log_info(...)      (!log_is_enabled(Info, __VA_ARGS__))     ? (void)0 : tty->print_cr
  34 #define log_debug(...)     (!log_is_enabled(Debug, __VA_ARGS__))    ? (void)0 : tty->print_cr
  35 #define log_trace(...)     (!log_is_enabled(Trace, __VA_ARGS__))    ? (void)0 : tty->print_cr
  36 
  37 #define log_is_enabled(level, ...) (LogImpl::is_level(LogLevel::level))
  38 
  39 class LogLevel : public AllStatic {
  40  public:
  41    enum type {
  42      Off,
  43      Trace,
  44      Debug,
  45      Info,
  46      Warning,
  47      Error
  48    };
  49 };
  50 typedef LogLevel::type LogLevelType;
  51 
  52 class LogImpl {
  53  public:
  54 
  55   LogImpl() {}
  56 
  57   static bool is_level(LogLevelType level) {
  58     if (PrintJFRLog || level == (jint)LogLevel::Error) {
  59       return true;
  60     }
  61 
  62     return false;
  63   }
  64 };
  65 
  66 #endif