Function SDW_add

src/jrd/sdw.cpp:71–118

void SDW_add(thread_db* tdbb, const TEXT* file_name, USHORT shadow_number, USHORT file_flags)
{
/**************************************
 *
 *	S D W _ a d d
 *
 **************************************
 *
 * Functional description
 *	Add a brand new shadowing file to the database.
 *
 **************************************/
	SET_TDBB(tdbb);
	Database* dbb = tdbb->getDatabase();

	// Verify database file path against DatabaseAccess entry of firebird.conf
	if (!JRD_verify_database_access(file_name))
	{
		ERR_post(Arg::Gds(isc_conf_access_denied) << Arg::Str("additional database file") <<
													 Arg::Str(file_name));
	}

	jrd_file* shadow_file = PIO_create(tdbb, file_name, false, false);

	if (dbb->dbb_flags & (DBB_force_write | DBB_no_fs_cache))
	{
		PIO_force_write(shadow_file, dbb->dbb_flags & DBB_force_write,
			dbb->dbb_flags & DBB_no_fs_cache);
	}

	SyncLockGuard guard(&dbb->dbb_shadow_sync, SYNC_EXCLUSIVE, "SDW_add");

	Shadow* shadow = allocate_shadow(shadow_file, shadow_number, file_flags);

	// dump out the header page, even if it is a conditional
	// shadow--the page will be fixed up properly

	if (shadow->sdw_flags & SDW_conditional)
		shadow->sdw_flags &= ~SDW_conditional;
	WIN window(HEADER_PAGE_NUMBER);
	CCH_FETCH(tdbb, &window, LCK_write, pag_header);
	CCH_MARK_MUST_WRITE(tdbb, &window);
	CCH_write_all_shadows(tdbb, 0, window.win_bdb, window.win_bdb->bdb_buffer,
		tdbb->tdbb_status_vector, false);
	CCH_RELEASE(tdbb, &window);
	if (file_flags & FILE_conditional)
		shadow->sdw_flags |= SDW_conditional;
}


int SDW_add_file(thread_db* tdbb, const TEXT* file_name, SLONG start, USHORT shadow_number)