- /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
- * Copyright 2011-2020 Pierre Ossman for Cendio AB
- *
- * This 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.
- *
- * This software 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 this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- //
- // Base class for output streams with a buffer
- //
-
- #ifndef __RDR_BUFFEREDOUTSTREAM_H__
- #define __RDR_BUFFEREDOUTSTREAM_H__
-
- #include <sys/time.h>
-
- #include <rdr/OutStream.h>
-
- namespace rdr {
-
- class BufferedOutStream : public OutStream {
-
- public:
- virtual ~BufferedOutStream();
-
- virtual size_t length();
- virtual void flush();
-
- // hasBufferedData() checks if there is any data yet to be flushed
-
- bool hasBufferedData();
-
- private:
- // flushBuffer() requests that the stream be flushed. Returns true if it is
- // able to progress the output (which might still not mean any bytes
- // actually moved) and can be called again.
-
- virtual bool flushBuffer() = 0;
-
- virtual void overrun(size_t needed);
-
- private:
- size_t bufSize;
- size_t offset;
- U8* start;
-
- struct timeval lastSizeCheck;
- size_t peakUsage;
-
- protected:
- U8* sentUpTo;
-
- protected:
- BufferedOutStream();
- };
-
- }
-
- #endif
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