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// distribution boxbackup-0.10 (svn version: 494)
//
// Copyright (c) 2003 - 2006
// Ben Summers and contributors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. All use of this software and associated advertising materials must
// display the following acknowledgment:
// This product includes software developed by Ben Summers.
// 4. The names of the Authors may not be used to endorse or promote
// products derived from this software without specific prior written
// permission.
//
// [Where legally impermissible the Authors do not disclaim liability for
// direct physical injury or death caused solely by defects in the software
// unless it is modified by a third party.]
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
//
//
// --------------------------------------------------------------------------
//
// File
// Name: Guards.h
// Purpose: Classes which ensure things are closed/deleted properly when
// going out of scope. Easy exception proof code, etc
// Created: 2003/07/12
//
// --------------------------------------------------------------------------
#ifndef GUARDS__H
#define GUARDS__H
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <new>
#include "CommonException.h"
#include "MemLeakFindOn.h"
template <int flags = O_RDONLY, int mode = (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)>
class FileHandleGuard
{
public:
FileHandleGuard(const char *filename)
: mOSFileHandle(::open(filename, flags, mode))
{
if(mOSFileHandle < 0)
{
THROW_EXCEPTION(CommonException, OSFileOpenError)
}
}
~FileHandleGuard()
{
if(mOSFileHandle >= 0)
{
Close();
}
}
void Close()
{
if(mOSFileHandle < 0)
{
THROW_EXCEPTION(CommonException, FileAlreadyClosed)
}
if(::close(mOSFileHandle) != 0)
{
THROW_EXCEPTION(CommonException, OSFileCloseError)
}
mOSFileHandle = -1;
}
operator int() const
{
return mOSFileHandle;
}
private:
int mOSFileHandle;
};
template<typename type>
class MemoryBlockGuard
{
public:
MemoryBlockGuard(int BlockSize)
: mpBlock(::malloc(BlockSize))
{
if(mpBlock == 0)
{
throw std::bad_alloc();
}
}
~MemoryBlockGuard()
{
free(mpBlock);
}
operator type() const
{
return (type)mpBlock;
}
type GetPtr() const
{
return (type)mpBlock;
}
void Resize(int NewSize)
{
void *ptrn = ::realloc(mpBlock, NewSize);
if(ptrn == 0)
{
throw std::bad_alloc();
}
mpBlock = ptrn;
}
private:
void *mpBlock;
};
#include "MemLeakFindOff.h"
#endif // GUARDS__H
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