Method BLB_close

src/jrd/blb.cpp:180–239

bool blb::BLB_close(thread_db* tdbb)
{
/**************************************
 *
 *      b l b : : c l o s e
 *
 **************************************
 *
 * Functional description
 *      Close a blob.  If the blob is open for retrieval, release the
 *      blob block.  If it's a temporary blob, flush out the last page
 *      (if necessary) in preparation for materialization.
 *      Return true if the blob was physically destroyed.
 *
 **************************************/

	SET_TDBB(tdbb);

	const bool alreadyClosed = (blb_flags & BLB_closed);

	// Release filter control resources

	if (blb_filter)
		BLF_close_blob(tdbb, &blb_filter);

	blb_flags &= ~BLB_close_on_read;
	blb_flags |= BLB_closed;

	if (!(blb_flags & BLB_temporary))
	{
		destroy(true);
		return true;
	}

	if (!alreadyClosed)
		blb_transaction->tra_temp_blobs_count--;

	if (blb_level == 0)
	{
		//Database* dbb = tdbb->getDatabase();

		blb_temp_size = blb_clump_size - blb_space_remaining;

		if (blb_temp_size > 0)
		{
			blb_temp_size += BLP_SIZE;
			TempSpace* const tempSpace = blb_transaction->getBlobSpace();

			blb_temp_offset = tempSpace->allocateSpace(blb_temp_size);
			tempSpace->write(blb_temp_offset, getBuffer(), blb_temp_size);
		}
	}
	else if (blb_level >= 1 && blb_space_remaining < blb_clump_size)
	{
		insert_page(tdbb);
	}

	freeBuffer();