System.h++

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/* ---------------------------------------------------------------------------
   commonc++ - A C++ Common Class Library
   Copyright (C) 2005-2012  Mark A Lindner

   This file is part of commonc++.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   ---------------------------------------------------------------------------
*/

#ifndef __ccxx_System_hxx
#define __ccxx_System_hxx

#include <commonc++/Common.h++>
#include <commonc++/Mutex.h++>
#include <commonc++/String.h++>
#include <commonc++/SystemException.h++>

#include <time.h>
#include <memory>

namespace ccxx {

class COMMONCPP_API System
{
  public:

  static time_s_t currentTime() throw();

  static time_ms_t currentTimeMillis() throw();

  static void setSystemTime(const time_ms_t &time) throw(SystemException);

  static String getEnvVariable(const String &name);

  static bool setEnvVariable(const String &name, const String &value)
    throw();

  static bool delEnvVariable(const String &name) throw();

  static String getUserName();

  static String getOSName();

  static String getOSVersion();

  static String getArchitecture();

  static String getHostName();

  static String getHomeDir();

  static String getTempDir();

  static inline void lockGlobalMutex() throw()
  { _globalLock.lock(); }

  static inline void unlockGlobalMutex() throw()
  { _globalLock.unlock(); }

  static String getErrorString(const String &text = String::null);

  static size_t getPageSize() throw();

  static void roundToPageSize(size_t& size) throw();

  static void printStackTrace(uint_t maxFrames = 20);

  static bool isPOSIX() throw();

  static bool isMacOSX() throw();

  static bool isWindows() throw();

  private:

  static void _getSystemInfo() throw();
  static Mutex _globalLock;

  static String _username;
  static String _osname;
  static String _osver;
  static String _arch;
  static String _hostname;
  static String _homedir;
  static String _tempdir;
  static bool _inited;

  CCXX_COPY_DECLS(System);
};

}; // namespace ccxx

#endif // __ccxx_System_hxx

/* end of header file */