Обсуждение: pgsql: Add macro to cast away volatile without allowing changes tounde

Add macro to cast away volatile without allowing changes to underlying type

This adds unvolatize(), which works just like unconstify() but for volatile.

Discussion: https://www.postgresql.org/message-id/flat/7a5cbea7-b8df-e910-0f10-04014bcad701%402ndquadrant.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/481018f2804065cb5ed1cde75b7c0596aeef959a

Modified Files
--------------
src/backend/postmaster/pgstat.c    | 2 +-
src/backend/storage/ipc/pmsignal.c | 2 +-
src/include/c.h                    | 8 +++++++-
3 files changed, 9 insertions(+), 3 deletions(-)