Thread: pgsql: Fix attach-related race condition in shm_mq_send_bytes.

Fix attach-related race condition in shm_mq_send_bytes.

Spotted by Antonin Houska.

Branch
------
REL9_5_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/caf89b31aa79b472a451a5b13657db0da43decee

Modified Files
--------------
src/backend/storage/ipc/shm_mq.c |   38 +++++++++++++++++++++-----------------
1 file changed, 21 insertions(+), 17 deletions(-)