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RE: question on write transaction

Thanks for pointing me out

-----Original Message-----
From: Howard Chu [mailto:hyc@symas.com] 
Sent: Tuesday, August 4, 2015 9:46 AM
To: Shu, Xinxin; openldap-technical@openldap.org
Subject: Re: question on write transaction

Shu, Xinxin wrote:
> Hi list, recently I wrote app on LMDB, found that for every write , lmdb lock a global lock when transaction is created , and release this lock in mdb_txn_commit,  on Ubuntu, this lock is implemented by pthread_mutext_t.   in my app, I create write transaction in a thread, then commit this write transaction in another thread, since lmdb use pthread_mutex_unlock to release this lock, according to manual , attempting to unlock the mutex if it was not locked by the calling thread results in undefined behavior, then my app cannot create write transaction . So does this issue known to community or is there any way to work around?

This is already documented.


   -- Howard Chu
   CTO, Symas Corp.           http://www.symas.com
   Director, Highland Sun     http://highlandsun.com/hyc/
   Chief Architect, OpenLDAP  http://www.openldap.org/project/