svcproc.h

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/*
 * svcproc.h
 *
 * Service Process (daemon) class.
 *
 * Portable Windows Library
 *
 * Copyright (c) 1993-1998 Equivalence Pty. Ltd.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Portable Windows Library.
 *
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
 *
 * Portions are Copyright (C) 1993 Free Software Foundation, Inc.
 * All Rights Reserved.
 *
 * Contributor(s): ______________________________________.
 *
 * $Revision: 22378 $
 * $Author: rjongbloed $
 * $Date: 2009-04-06 22:20:13 -0500 (Mon, 06 Apr 2009) $
 */

#ifndef PTLIB_SERVICEPROCESS_H
#define PTLIB_SERVICEPROCESS_H

#ifdef P_USE_PRAGMA
#pragma interface
#endif

#include <ptlib/pprocess.h>

class PSystemLog : public PObject, public iostream {
  PCLASSINFO(PSystemLog, PObject);

  public:

    enum Level {
      StdError = -1,
      Fatal,   
      Error,    
      Warning,  
      Info,     
      Debug,    
      Debug2,   
      Debug3,   
      Debug4,   
      Debug5,   
      Debug6,   

      NumLogLevels
    };

    PSystemLog(
     Level level   
    ) : iostream(cout.rdbuf())
      , logLevel(level)
    { 
      buffer.log = this; 
      init(&buffer); 
    }

    ~PSystemLog() { flush(); }

    static void Output(
      Level level,      
      const char * msg  
    );

    void SetLevel(
      Level level  
    ) { logLevel = level; }

    Level GetLevel() const { return logLevel; }

  private:
    PSystemLog(const PSystemLog & other) : PObject(other), iostream(cout.rdbuf()) { }
    PSystemLog & operator=(const PSystemLog &) { return *this; }

    class Buffer : public streambuf {
      public:
        virtual int_type overflow(int=EOF);
        virtual int_type underflow();
        virtual int sync();
        PSystemLog * log;
        PString string;
    } buffer;
    friend class Buffer;

    Level logLevel;
};


#define PSYSTEMLOG(level, variables) \
  if (PServiceProcess::Current().GetLogLevel() >= PSystemLog::level) { \
    PSystemLog P_systemlog(PSystemLog::level); \
    P_systemlog << variables; \
  } else (void)0



class PServiceProcess : public PProcess
{
  PCLASSINFO(PServiceProcess, PProcess);

  public:
    PServiceProcess(
      const char * manuf,   
      const char * name,    
      WORD majorVersion,    
      WORD minorVersion,    
      CodeStatus status,    
      WORD buildNumber      
    );

    virtual PBoolean OnStart() = 0;

    virtual void OnStop();

    virtual PBoolean OnPause();

    virtual void OnContinue();

    virtual void OnControl() = 0;

    static PServiceProcess & Current();


    void SetLogLevel(
      PSystemLog::Level level  
    ) { currentLogLevel = level; }

    PSystemLog::Level GetLogLevel() const { return currentLogLevel; }


    /* Internal initialisation function called directly from
       #main()#. The user should never call this function.
     */
    virtual int InternalMain(void * arg = NULL);


  protected:
  // Member variables
    PBoolean debugMode;

    PSystemLog::Level currentLogLevel;

    friend void PSystemLog::Output(PSystemLog::Level, const char *);


// Include platform dependent part of class
#ifdef _WIN32
#include "msos/ptlib/svcproc.h"
#else
#include "unix/ptlib/svcproc.h"
#endif
};


#endif // PTLIB_SERVICEPROCESS_H


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