Re: Transaction-scope advisory locks

From: Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com>
To: Marko Tiikkaja <marko(dot)tiikkaja(at)cs(dot)helsinki(dot)fi>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Transaction-scope advisory locks
Date: 2011-02-10 08:15:28
Message-ID: AANLkTi=EerOrjHWJmeiFpBinbRBZ0pHDXX344raSSdAV@mail.gmail.com
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On Thu, Feb 10, 2011 at 08:36, Marko Tiikkaja
<marko(dot)tiikkaja(at)cs(dot)helsinki(dot)fi> wrote:
>> One issue might be in pg_locks
> Robert suggested not doing this for 9.1, and I don't have anything against
> that.

Agreed.

> Updated patch attached.

Looks good to commit. I note a few minor issues for committer:

* Functions listed in "Table 9-62. Advisory Lock Functions" might need
sorted in alphabetical order.

* We could extend LockReleaseAll() to have the 3rd mode
instead of LockReleaseSession(). Existing behavior is:
| LockReleaseAll(LOCKMETHODID lockmethodid, bool allLocks)
| allLocks == true: release all locks including session locks.
| allLocks == false: release all non-session locks.

* Or, we might have one subroutine for LockReleaseSession() and
LockReleaseCurrentOwner(). They have similar codes.

--
Itagaki Takahiro

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