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// @file logfile.h simple file log writing / journaling

/**
* Copyright (C) 2010 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

namespace mongo {

    class LogFile {
    public:
        /** create the file and open. must not already exist.
throws UserAssertion on i/o error
*/
        LogFile(string name);

        /** closes */
        ~LogFile();

        /** append to file. does not return until sync'd. uses direct i/o when possible.
throws UserAssertion on an i/o error
note direct i/o may have alignment requirements
*/
        void synchronousAppend(const void *buf, size_t len);

    private:
#if defined(_WIN32)
        typedef HANDLE fd_type;
#else
        typedef int fd_type;
#endif
        fd_type _fd;
    };

}
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