flush.c

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/**
 * \file flush.c
 *
 * \brief Segment flush routines.
 *
 * This program is free software under the GNU General Public License
 * (>=v2). Read the file COPYING that comes with GRASS for details.
 *
 * \author GRASS GIS Development Team
 *
 * \date 2005-2009
 */
 
#include "local_proto.h"
 
/**
 * \fn int Segment_flush (SEGMENT *SEG)
 *
 * \brief Flush pending updates to disk.
 *
 * Forces all pending updates generated by <i>Segment_put()</i> to be
 * written to the segment file <b>seg</b>. Must be called after the
 * final <i>Segment_put()</i> to force all pending updates to disk. Must
 * also be called before the first call to <i>Segment_get_row</i>.
 *
 * \param[in] SEG segment
 * \return always returns 0
 */
 
int Segment_flush(SEGMENT *SEG)
{
    int i;
 
    if (SEG->scb) {
        for (i = 0; i < SEG->nseg; i++)
            if (SEG->scb[i].n >= 0 && SEG->scb[i].dirty)
                seg_pageout(SEG, i);
    }
 
    return 0;
}