C++ (Cpp) tbm_mark_page_lossy Examples

Example #1

File: tidbitmap.c Project: Mrfuture1/gpdb

/* Process one page of b during a union op */
static void
tbm_union_page(HashBitmap *a, const PagetableEntry *bpage)
{
	PagetableEntry *apage;
	int			wordnum;

	if (bpage->ischunk)
	{
		/* Scan b's chunk, mark each indicated page lossy in a */
		for (wordnum = 0; wordnum < WORDS_PER_PAGE; wordnum++)
		{
			tbm_bitmapword	w = bpage->words[wordnum];

			if (w != 0)
			{
				BlockNumber pg;

				pg = bpage->blockno + (wordnum * TBM_BITS_PER_BITMAPWORD);
				while (w != 0)
				{
					if (w & 1)
						tbm_mark_page_lossy(a, pg);
					pg++;
					w >>= 1;
				}
			}
		}
	}

Example #2

/*
 * tbm_add_page - add a whole page to a TIDBitmap
 *
 * This causes the whole page to be reported (with the recheck flag)
 * when the TIDBitmap is scanned.
 */
void
tbm_add_page(TIDBitmap *tbm, BlockNumber pageno)
{
    /* Enter the page in the bitmap, or mark it lossy if already present */
    tbm_mark_page_lossy(tbm, pageno);
    /* If we went over the memory limit, lossify some more pages */
    if (tbm->nentries > tbm->maxentries)
        tbm_lossify(tbm);
}