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/*
* Baltisot
* Copyright (C) 1999-2003 Nicolas "Pixel" Noble
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* $Id: Exceptions.h,v 1.43 2006-10-28 16:42:19 pixel Exp $ */
#ifndef __EXCEPTIONS_H__
#define __EXCEPTIONS_H__
#include <stdio.h>
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <vector>
#include <generic.h>
#if !defined pid_t && !defined _SYS_TYPES_H
typedef int pid_t;
#endif
#ifdef _MSC_VER
#pragma warning (disable:4290)
#endif
class String;
struct ugly_string;
void xfree(unsigned char *&);
//! The Base class, that everybody should use.
/*!
This base class should be derivated for every single class you create. That
way, common functions will be overloaded and safe to use (like malloc)12~
*/
class Base {
public:
virtual ~Base() {};
static char * strdup(const char * s);
static void * malloc(ssize_t s);
static void * realloc(void * p, size_t s);
static void * calloc(size_t n, size_t s);
static int dup(int);
void * operator new(size_t s);
void * operator new(size_t s, void * p);
void operator delete(void * p);
template <class T>
static void free(T *& p) {
unsigned char * t = (unsigned char *) p;
xfree(t);
p = 0;
}
static int pipe(int * p, int flag = 0);
static pid_t fork();
static pid_t wait(int *);
//! This wrapper will call the xexit function.
static void exit(int);
static void printm(int level, const ugly_string &, ...);
static void printm(int level, const char *, ...);
static void exception(const String &);
static void pushcontext(const String &);
static void popcontext(void);
static void flushcontext(void);
private:
static std::vector<String> context;
};
//! Every exception class should inherit from this one.
/*!
This generic class should be handled from the main, so that the software
can exit nicely if an exception is thrown, with a built-in message.
*/
class GeneralException : public Base {
public:
//! The constructor has to provide a string describing the exception.
GeneralException(String);
GeneralException(const GeneralException &);
~GeneralException();
//! This should only be used by the exception manager in order to display what went wrong.
const char * GetMsg() const;
protected:
GeneralException();
char * msg;
static char t[BUFSIZ];
};
char * xstrdup(const char *);
void * xmalloc(size_t) throw (GeneralException);
void * xrealloc(void *, size_t);
int xdup(int) throw (GeneralException);
int xpipe(int *, int = 0) throw (GeneralException);
pid_t xfork() throw (GeneralException);
pid_t xwait(int *) throw (GeneralException);
//! This will simply throw the Exit exception.
void xexit(int) throw (GeneralException);
void xexception(const String &) throw (GeneralException);
class MemoryException : public GeneralException {
public:
MemoryException(ssize_t);
};
class TaskNotFound : public GeneralException {
public:
TaskNotFound();
};
enum op_t {
IO_WRITE = 1,
IO_READ
};
class IOGeneral : public GeneralException {
public:
IOGeneral(String);
protected:
IOGeneral();
};
class IOException : public IOGeneral {
public:
IOException(String, op_t, ssize_t);
};
class IOAgain : public IOGeneral {
public:
IOAgain();
};
class TaskSwitch : public GeneralException {
public:
TaskSwitch();
};
//! This exception can be thrown anyway, in order to exit nicely the software.
/*!
My suggestion when using this exception, is to add a special manager, in order to
handle clean up, in the same manner as the atexit function.
*/
class Exit : public GeneralException {
public:
//! The provided code should be the exit code.
Exit(int code);
//! Fetches the exit code out of the Exit exception.
int GetCode();
private:
int code;
};
/*!
The printer class, if it exists, will be used as another way to display
informations from printm.
*/
class printer_t : public Base {
public:
virtual bool printm(int, const char *, va_list) = 0;
};
extern printer_t * printer;
/*!
The locker class, if it exists, will be used to produce interlocking
inside the nested classes when needed. Define it if you're going to build
a real threaded software with Baltisot.
*/
class locker_t : public Base {
public:
virtual void lock() = 0;
virtual void unlock() = 0;
};
extern locker_t * locker;
#define LOCK if (locker) locker->lock()
#define UNLOCK if (locker) locker->unlock();
#include <BString.h>
#endif
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