1 files changed, 112 insertions, 0 deletions
diff --git a/src/gui/seqmanager/SegmentMmapper.h b/src/gui/seqmanager/SegmentMmapper.h
new file mode 100644
index 0000000..ab25aab
--- /dev/null
+++ b/src/gui/seqmanager/SegmentMmapper.h
@@ -0,0 +1,112 @@
+
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+
+    This program 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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _RG_SEGMENTMMAPPER_H_
+#define _RG_SEGMENTMMAPPER_H_
+
+#include <qstring.h>
+#include "base/Event.h"
+
+
+
+
+namespace Rosegarden
+{
+
+class TriggerSegmentRec;
+class Segment;
+class RosegardenGUIDoc;
+class MappedEvent;
+class Event;
+
+
+class SegmentMmapper
+{
+    friend class SegmentMmapperFactory;
+public:
+    virtual ~SegmentMmapper();
+
+    /**
+     * refresh the object after the segment has been modified
+     * returns true if size changed (and thus the sequencer
+     * needs to be told about it
+     */
+    bool refresh();
+
+    QString getFileName() { return m_fileName; }
+    size_t getFileSize() const { return m_mmappedSize; }
+
+    virtual unsigned int getSegmentRepeatCount();
+
+protected:
+    SegmentMmapper(RosegardenGUIDoc*, Segment*,
+                   const QString& fileName);
+
+    virtual size_t computeMmappedSize();
+    
+    virtual size_t addMmappedSize(Segment *);
+
+    /// actual setup, must be called after ctor, calls virtual methods
+    virtual void init();
+
+    /// set the size of the mmapped file
+    void setFileSize(size_t);
+
+    /// perform the mmap() of the file
+    void doMmap();
+
+    /// mremap() the file after a size change
+    void remap(size_t newsize);
+
+    /// dump all segment data in the file
+    virtual void dump();
+
+    void mergeTriggerSegment(Segment **target,
+                             Event *trigger,
+                             timeT performanceDuration,
+                             TriggerSegmentRec *rec);
+
+    //--------------- Data members ---------------------------------
+    RosegardenGUIDoc* m_doc;
+    Segment* m_segment;
+    QString m_fileName;
+
+    int m_fd;
+    size_t m_mmappedSize;
+
+    // The shared memory region starts with a size_t value
+    // representing the number of MappedEvents that follow.
+    void *m_mmappedRegion;
+
+    // And this points to the next byte in the shared memory region.
+    MappedEvent* m_mmappedEventBuffer;
+};
+
+//----------------------------------------
+
+
+}
+
+#endif