Re: problem in cleanup of cursors in oracle.c - can cause php to die!!

On Thu, 22 Apr 1999, Andreas Karajannis wrote: > "Stig S. Bakken" wrote: > > > > "Thies C. Arntzen" wrote: > > > > > > hi, > > > > > > -- sorry this might be a bit chaotic, but i feel kind-a braindead today - i think the > > > interesting stuff is the purify log below!!! - > > > > > > i've isolated (i think) a real problem in the oracle.c stuff: > > > > > > (this problem causes random crashes when you use the oracle driver!) > > > > > > the problem is that we do a > > > _php3_hash_apply(ORACLE_GLOBAL(php3_oracle_module).resource_list, > > > (int (*)(void *))_cursors_cleanup); > > > > > > in line 203 and 216 (_close_orapconn, _close_oraconn) -> but these > > > functions already get called thru destroy_resource_list which means that > > > we end up having kind of a recursion - and we're having no control over > > > > > the order in which things get released -> and we NEED to release cursors BEFORE > > > connectiond!!! > > > > What about not having a list destructor for cursors, but rather release > > all cursors associated with a connection in the connection destructor? > > > > - Stig > > > > It's been a while since I was into the oracle7 module, but if I remember > things right, this was based on the assumption, that a connection is > inserted into resource_list _before_ any cursor. On Shutdown, the list > is destroyed from the beginning, connection before associated cursors. > If we have 1 connection with 1 cursor, I think the order is: > destroy_resource_list() -> connection > _close_ora(p)conn() > _cursors_cleanup() -> cursor is closed and cursor->open is set to 0, > connections should be still there - see above > ologof() > destroy_resource_list() -> cursor > _close_oracur() != _cursors_cleanup() > > If I get things right, that's hwt Stig suggests. but as purify never lies;-) - we have a problem down here -> reread the log i sent.... i'm willing to "fix" it as soon as somebody can tell me how to traverse the le_conn list.... (hope it's not a RTFM;-) tc > > -Andreas > > -- > Andreas Karajannis > GMD National Research Center for Information Technology > Schloss Birlinghoven, D-53754 Sankt Augustin > Phone +49 2241 142948 > > Thies C. Arntzen "One Big-Mac, Small Fries and a Coke!" Digital Collections Phone +49 40 235350 Fax +49 40 23535180 Hammerbrookstr. 93 20097 Hamburg / Germany -- PHP Development Mailing List http://www.php.net/ To unsubscribe send an empty message to php-dev-unsubscribe@lists.php.net For help: php-dev-help@lists.php.net