def getparentxid(self, xid):
if not Trans.xidisnormal(xid):
return 0
pageno = xid / self.SUBTRANS_XACTS_PER_PAGE
entry = xid % self.SUBTRANS_XACTS_PER_PAGE
try:
page = self.getlrupage(pageno)
except UPgException:
return 0
parentxid = pgstruct.gettransactionid(page.data, entry*typesize['TransactionId'])
return parentxid
def getparentxid(self, xid):
if not Trans.xidisnormal(xid):
return 0
pageno = xid / self.SUBTRANS_XACTS_PER_PAGE
entry = xid % self.SUBTRANS_XACTS_PER_PAGE
try:
page = self.getlrupage(pageno)
except UPgException:
return 0
parentxid = pgstruct.gettransactionid(
page.data, entry * typesize['TransactionId'])
return parentxid
def getmembers(self, multixid, readtoinvalid = False, multixactstate = None):
result = []
thisoffset = self.offsetcache.getoffset(multixid, multixactstate)
if not thisoffset:
return None
nextxid = uint32advancedIgnor0(multixid, 1)
targetoffset = None
if multixactstate and multixactstate.nextmultixactid == nextxid:
targetoffset = multixactstate.nextoffset
else:
nextoffset = self.offsetcache.getoffset(nextxid, multixactstate)
if not nextoffset and not readtoinvalid:
logger.error("could not find next multi transaction's offset:%u"%(nextxid))
return None
if nextoffset:
targetoffset = nextoffset
offset = thisoffset
while True:
if targetoffset and offset == targetoffset:
break
pageno = self.__getmemberpagebyoffset(offset)
memberoff = self.__getmemberinnerpageoffsetbyoffset(offset)
try:
blockdata = self.getlrupage(pageno).data
except UPgException:
if targetoffset:
logger.error("could not read member block:%u"%(pageno))
return None
else:
return result
memberxid = pgstruct.gettransactionid(blockdata, memberoff)
if memberxid == 0:
if targetoffset:
logger.error("found invalid member transaction id in offset:%u"%(offset))
return None
else:
return result
flagoff = self.__getgroupflagoffset(offset)
bshift = self.__getmemberflagbitsshit(offset)
flag = pgstruct.getuint(blockdata, flagoff)
status = (flag >> bshift) & self.MXACT_MEMBER_XACT_BITMASK;
result.append((memberxid, status))
offset = uint32advancedIgnor0(offset, 1)
return result
