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From Tom Lane
Subject pgsql/ ontrib/userlock/README.user_locks ontri ...
Date
Msg-id 200106220004.f5M04xV56281@hub.org
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CVSROOT:    /home/projects/pgsql/cvsroot
Module name:    pgsql
Changes by:    tgl@hub.org    01/06/21 20:04:59

Modified files:
    contrib/userlock: README.user_locks user_locks.c
    src/backend/storage/lmgr: lmgr.c lock.c
    src/include/storage: lmgr.h lock.h

Log message:
    Add support to lock manager for conditionally locking a lock (ie,
    return without waiting if we can't get the lock immediately).
    Not used yet, but will be needed for concurrent VACUUM.

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