filehandle.h

nandflash文件系统源代码

//---------------------------------------------------------- -*- Mode: C++ -*-
// $Id:$
//
// Created 2008/05/13
//
// Author: Sriram Rao
//
// Copyright 2008 Quantcast Corp.
//
// This file is part of Kosmos File System (KFS).
//
// Licensed under the Apache License, Version 2.0
// (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
//
// \brief A ref-counted file-id object.
//
//----------------------------------------------------------------------------

#ifndef _LIBKFSIO_FILEHANDLE_H
#define _LIBKFSIO_FILEHANDLE_H

#include <boost/shared_ptr.hpp>

namespace KFS
{
    struct FileHandle_t {
        FileHandle_t() : mFd(-1) { }
        FileHandle_t(int fd) : mFd(fd) { }
        ~FileHandle_t() {
            if (mFd < 0)
                return;
            close(mFd);
            mFd = -1;
        }
        void Close() {
            if (mFd < 0)
                return;
            close(mFd);
            mFd = -1;
        }
        int mFd; // the underlying file pointer
    };

    typedef boost::shared_ptr<FileHandle_t> FileHandlePtr;
}

#endif // _LIBKFSIO_FILEHANDLE_H