From: Austin Clements <amdra...@mit.edu> In Xapian, closing a database implicitly aborts any outstanding transaction and commits changes. For historical reasons, notmuch_database_close had grown to almost, but not quite duplicate this behavior. Before closing the database, it would explicitly (and unnecessarily) commit it. However, if there was an outstanding transaction (ie atomic section), commit would throw a Xapian exception, which notmuch_database_close would unnecessarily print to stderr, even though notmuch_database_close would ultimately abort the transaction anyway when it called close.
This patch simplifies notmuch_database_close to just call Database::close. This works for both read-only and read/write databases, takes care of committing changes, unifies the exception handling path, and codifies aborting outstanding transactions. This is currently the only way to abort an atomic section (and may remain so, since it would be difficult to roll back things we may have cached from rolled-back modifications). --- lib/database.cc | 23 +++++++---------------- lib/notmuch.h | 5 +++++ 2 files changed, 12 insertions(+), 16 deletions(-) diff --git a/lib/database.cc b/lib/database.cc index a3a7cd3..1f7ff2a 100644 --- a/lib/database.cc +++ b/lib/database.cc @@ -903,28 +903,19 @@ notmuch_database_close (notmuch_database_t *notmuch) { notmuch_status_t status = NOTMUCH_STATUS_SUCCESS; - try { - if (notmuch->xapian_db != NULL && - notmuch->mode == NOTMUCH_DATABASE_MODE_READ_WRITE) - (static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db))->flush (); - } catch (const Xapian::Error &error) { - status = NOTMUCH_STATUS_XAPIAN_EXCEPTION; - if (! notmuch->exception_reported) { - fprintf (stderr, "Error: A Xapian exception occurred flushing database: %s\n", - error.get_msg().c_str()); - } - } - /* Many Xapian objects (and thus notmuch objects) hold references to * the database, so merely deleting the database may not suffice to - * close it. Thus, we explicitly close it here. */ + * close it. Thus, we explicitly close it here. This will + * implicitly abort any outstanding transaction and commit changes. */ if (notmuch->xapian_db != NULL) { try { notmuch->xapian_db->close(); } catch (const Xapian::Error &error) { - /* don't clobber previous error status */ - if (status == NOTMUCH_STATUS_SUCCESS) - status = NOTMUCH_STATUS_XAPIAN_EXCEPTION; + status = NOTMUCH_STATUS_XAPIAN_EXCEPTION; + if (! notmuch->exception_reported) { + fprintf (stderr, "Error: A Xapian exception occurred closing database: %s\n", + error.get_msg().c_str()); + } } } diff --git a/lib/notmuch.h b/lib/notmuch.h index fe2340b..5c40c67 100644 --- a/lib/notmuch.h +++ b/lib/notmuch.h @@ -292,6 +292,11 @@ notmuch_database_open (const char *path, * notmuch_database_close can be called multiple times. Later calls * have no effect. * + * If the caller is currently in an atomic section (there was a + * notmuch_database_begin_atomic without a matching + * notmuch_database_end_atomic), this will abort the atomic section, + * discarding any modifications made in the atomic section. + * * Return value: * * NOTMUCH_STATUS_SUCCESS: Successfully closed the database. -- 2.1.0 _______________________________________________ notmuch mailing list notmuch@notmuchmail.org http://notmuchmail.org/mailman/listinfo/notmuch