def _pause_pack_until_lock(self, cursor, sleep):
"""Pause until we can obtain a nowait commit lock."""
if sleep is None:
sleep = time.sleep
delay = self.options.pack_commit_busy_delay
while not self.locker.hold_commit_lock(cursor, nowait=True):
mysql_connection(cursor).rollback()
log.debug('pack: commit lock busy, sleeping %.4g second(s)', delay)
sleep(delay)
def _pause_pack_until_lock(self, cursor, sleep):
"""Pause until we can obtain a nowait commit lock."""
if sleep is None:
sleep = time.sleep
delay = self.options.pack_commit_busy_delay
while not self.locker.hold_commit_lock(cursor, nowait=True):
mysql_connection(cursor).rollback()
log.debug('pack: commit lock busy, sleeping %.4g second(s)', delay)
sleep(delay)
def new_oids(self, cursor):
"""Return a sequence of new, unused OIDs."""
stmt = "INSERT INTO new_oid VALUES ()"
cursor.execute(stmt)
conn = mysql_connection(cursor)
n = conn.insert_id()
if n % 100 == 0:
# Clean out previously generated OIDs.
stmt = "DELETE FROM new_oid WHERE zoid < %s"
cursor.execute(stmt, (n,))
return range(n * 16 - 15, n * 16 + 1)
