services/early_logger.h

   1 /* Quarn OS
   2  *
   3  * Early logger
   4  *
   5  * Copyright (C) 2008-2009 Pawel Dziepak
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  */
  22
  23 /* Interface of a logger that can be used immediately after booting kernel.
  24  * It does not uses any high-level kernel structures and objects, so it can be
  25  * a good way to inform about their corruption. However it is not reccomended
  26  * to use it after setting up "standard" tty logger.
  27  */
  28
  29 #ifndef _EARLY_LOGGER_H_
  30 #define _EARLY_LOGGER_H_
  31
  32 #include "libs/stream.h"
  33
  34 #include "logger.h"
  35
  36 namespace services {
  37         class early_logger : public logger {
  38         private:
  39                 p<resources::stream> output;
  40
  41         public:
  42                 early_logger();
  43                 void print(const string&, log_level);
  44
  45                 static void register_type();
  46         };
  47 }
  48
  49 #endif