TransferFile.h

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//
// TransferFile.h
//
// Copyright (c) Shareaza Development Team, 2002-2005.
// This file is part of SHAREAZA (www.shareaza.com)
//
// Shareaza 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.
//
// Shareaza 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 Shareaza; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#if !defined(AFX_TRANSFERFILE_H__FF7BC368_5878_4BCF_A2AD_055B0355AC3A__INCLUDED_)
#define AFX_TRANSFERFILE_H__FF7BC368_5878_4BCF_A2AD_055B0355AC3A__INCLUDED_

#pragma once

class CTransferFile;

class CTransferFiles
{
// Construction
public:
        CTransferFiles();
        virtual ~CTransferFiles();

// Attributes
public:
        CCriticalSection        m_pSection;
        CMapStringToPtr         m_pMap;
        CPtrList                        m_pDeferred;

// Operations
public:
        CTransferFile*  Open(LPCTSTR pszFile, BOOL bWrite, BOOL bCreate);
        void                    Close();
        void                    CommitDeferred();
protected:
        void                    QueueDeferred(CTransferFile* pFile);
        void                    Remove(CTransferFile* pFile);

        friend class CTransferFile;
};

#define DEFERRED_MAX    8

class CTransferFile
{
// Construction
public:
        CTransferFile(LPCTSTR pszPath);
        virtual ~CTransferFile();

// Deferred Write Structure
protected:
        class DefWrite
        {
        public:
                QWORD   m_nOffset;
                DWORD   m_nLength;
                BYTE*   m_pBuffer;
        };

// Attributes
protected:
        CString         m_sPath;
        HANDLE          m_hFile;
        BOOL            m_bWrite;
        DWORD           m_nReference;
protected:
        DefWrite        m_pDeferred[DEFERRED_MAX];
        int                     m_nDeferred;

// Operations
public:
        void            AddRef();
        void            Release(BOOL bWrite);
        HANDLE          GetHandle(BOOL bWrite = FALSE);
        BOOL            IsOpen();
        BOOL            Read(QWORD nOffset, LPVOID pBuffer, QWORD nBuffer, QWORD* pnRead);
        BOOL            Write(QWORD nOffset, LPCVOID pBuffer, QWORD nBuffer, QWORD* pnWritten);
protected:
        BOOL            Open(BOOL bWrite, BOOL bCreate);
        BOOL            EnsureWrite();
        BOOL            CloseWrite();
        void            DeferredWrite(BOOL bOffline = FALSE);

        friend class CTransferFiles;

};


extern CTransferFiles TransferFiles;

#endif // !defined(AFX_TRANSFERFILE_H__FF7BC368_5878_4BCF_A2AD_055B0355AC3A__INCLUDED_)

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