/* UseMetaRevision
* opens indicated revision of metadata
* all non-zero revisions are read-only
*/
LIB_EXPORT rc_t CC SRATableUseMetaRevision ( const SRATable *cself, uint32_t revision )
{
rc_t rc;
if ( cself == NULL )
rc = RC ( rcSRA, rcTable, rcUpdating, rcSelf, rcNull );
else if ( cself -> read_only == false )
rc = RC ( rcSRA, rcTable, rcUpdating, rcMetadata, rcBusy );
else
{
uint32_t cur;
rc = KMetadataRevision ( cself -> meta, & cur );
if ( rc == 0 && cur != revision )
{
SRATable *self = ( SRATable* ) cself;
const KMetadata *meta;
rc = KMetadataOpenRevision ( self -> meta, & meta, revision );
if ( rc == 0 )
{
KMetadataRelease ( self -> meta );
self -> meta = meta;
}
}
}
return rc;
}
/* MetaRevision
* returns current revision number
* where 0(zero) means tip
*/
LIB_EXPORT rc_t CC SRATableMetaRevision( const SRATable *self, uint32_t *rslt )
{
if (self == NULL)
return RC(rcSRA, rcTable, rcAccessing, rcSelf, rcNull);
return KMetadataRevision (self->meta,rslt);
}
/* Revision
* returns current revision number
* where 0 ( zero ) means tip
*/
inline rc_t Revision ( uint32_t *revision ) const throw()
{ return KMetadataRevision ( this, revision ); }