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ODBCFilePlugin.h

/*
   Copyright (C) 2002 the Strongroom project

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   @author Ewald Snel
*/

#ifndef __ODBCFILEPLUGIN_H
#define __ODBCFILEPLUGIN_H

#include <pthread.h>

#include <FilePlugin.h>
#include <HashUtils.h>
#include <ODBCConnection.h>
#include <ODBCQuery.h>


// Open file information
struct OpenFileInfo
{
    ODBCQuery *query;
    int64_t length;
    NumID fileid;
};


class ODBCFilePlugin : public FilePlugin
{
public:
    ODBCFilePlugin( const Config &cfg );
    ~ODBCFilePlugin();

    bool init();

    CoreError create( NumID &fileid );
    CoreError open( NumID fileid, NumID &of );
    CoreError remove( NumID fileid );

    int64_t getLength( NumID fileid );
    CoreError write( NumID fileid, char *data, int length );
    CoreError read( NumID fileid, char *data, int length, int &bRead );
    CoreError close( NumID fileid );

private:
    ODBCConnection odbc;
    pthread_mutex_t mutex;
    hash_map<NumID,OpenFileInfo,_hash_NumID> openFiles;
    hash_map<NumID,int,_hash_NumID> fileLocks;
};

#endif

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