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Fix ABI break by moving PROCSIG_SLOTSYNC_MESSAGE in ProcSignalReason

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Commit 15910b1c36 PROCSIG_SLOTSYNC_MESSAGE in the middle of
enum ProcSignalReason, breaking the ABI.

Fix this by moving PROCSIG_SLOTSYNC_MESSAGE to just before the last entry,
NUM_PROCSIGNALS, to restore ordering of other entries.

This increases the value of NUM_PROCSIGNALS, which technically changes the ABI.
However, since it represents the number of enum entries (not a signal reason),
and no affected third-party code is known, this change will be recorded in
.abi-compliance-history later.

Per buildfarm member crake.

Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Nisha Moond <nisha.moond412@gmail.com>
Discussion: https://postgr.es/m/CAHGQGwH_AAbtsiYDJt65N7_4PJ0CgOJmBEaCq68e5_tcuG_vXw@mail.gmail.com
Backpatch-through: 17 only
This commit is contained in:
Fujii Masao 2026-04-09 15:30:59 +09:00
parent 15910b1c36
commit 586f4266fb
1 changed files with 2 additions and 1 deletions
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3
src/include/storage/procsignal.h
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@ -36,7 +36,6 @@ typedef enum
PROCSIG_BARRIER, /* global barrier interrupt */
PROCSIG_LOG_MEMORY_CONTEXT, /* ask backend to log the memory contexts */
PROCSIG_PARALLEL_APPLY_MESSAGE, /* Message from parallel apply workers */
PROCSIG_SLOTSYNC_MESSAGE, /* ask slot synchronization to stop */
/* Recovery conflict reasons */
PROCSIG_RECOVERY_CONFLICT_FIRST,
@ -49,6 +48,8 @@ typedef enum
PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK,
PROCSIG_RECOVERY_CONFLICT_LAST = PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK,
PROCSIG_SLOTSYNC_MESSAGE, /* ask slot synchronization to stop */
NUM_PROCSIGNALS /* Must be last! */
} ProcSignalReason;