On Tue, Nov 1, 2016 at 12:35 PM, Abbas Butt <abbas.b...@enterprisedb.com> wrote: > Hi, > Consider this situation: > 1. I have a background worker process. > 2. The process creates a latch, initializes it using InitLatch & resets it. > 3. It then creates a thread and passes the latch created in step 2 to it. > To pass it, the process uses the last argument of pthread_create. > 4. The thread blocks by calling WaitLatch. > 5. The process after some time sets the latch using SetLatch. > > The thread does not notice that the latch has been set and keeps waiting. > > My question is: > Are latches supposed to work between a process and a thread created by that > process?
Nothing in the entire backend is guaranteed to work if you spawn multiple threads within the same process. Including this. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
