00001 /*
00002    wefts_error.h
00003    Error classes - for trhow statements.
00004 
00005    $Id: wefts_error.h,v 1.5 2004/03/12 02:44:13 jonnymind Exp $
00006 ---------------------------------------------
00007    Begin      : 2003-08-15 17:13
00008    Author     : Giancarlo Niccolai
00009 
00010    Last modified because:
00011 
00012 */
00013 
00014 /**************************************************************************
00015 *   This program is free software; you can redistribute it and/or modify  *
00016 *   it under the terms of the GNU Library General Public License as       *
00017 *   published by the Free Software Foundation; either version 2.1 of the  *
00018 *   License, or (at your option) any later version.                       *
00019 ***************************************************************************/
00020 
00021 
00022 #ifndef WT_ERROR_H
00023 #define WT_ERROR_H
00024 
00025 #include <string>
00026 #include <iostream>
00027 
00035 namespace Wefts {
00036 
00044 class Error
00045 {
00046 private:
00047    int m_osCode;
00048    std::string m_descr;
00049 
00050 public:
00055    Error( int code=0, std::string descr="Generic low-level error" );
00056 
00061    int osCode() const { return m_osCode; }
00062 
00064    virtual const std::string &description() const { return m_descr; }
00065 
00067    virtual const std::string className() const { return "Wefts::Error"; }
00068 
00072    friend std::ostream& operator<<( std::ostream &stream, Error &err );
00073 };
00074 
00075 
00077 class NotJoinableError: public Error
00078 {
00079 public:
00084    NotJoinableError( int code=0, std::string descr = "Can't join target thread" );
00085 
00087    virtual const std::string className() const { return "Wefts::NotJoinableError"; }
00088 
00089 };
00090 
00092 class InvalidError: public Error
00093 {
00094 public:
00099    InvalidError( int code=0, std::string descr="Using an object in an invalid state" );
00100    
00102    virtual const std::string className() const { return "Wefts::InvalidError"; }
00103 
00104 };
00105 
00107 class InitError: public Error
00108 {
00109 public:
00114    InitError( int code=0, std::string descr="Object cannot be initialized" );
00115 
00117    virtual const std::string className() const { return "Wefts::InitError"; }
00118 
00119 };
00120 
00122 class StartError: public Error
00123 {
00124 public:
00129    StartError( int code=0, std::string descr="Can't start OS thread" );
00130 
00132    virtual const std::string className() const { return "Wefts::StartError"; }
00133 
00134 };
00135 
00140 }
00141 
00142 #endif
00143 
00144 /* end of wefts_error.h */