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Add macros for ReorderBufferTXN toptxn.

Currently, there are quite a few places in reorderbuffer.c that tries to
access top-transaction for a subtransaction. This makes the code to access
top-transaction consistent and easier to follow.

Author: Peter Smith
Reviewed-by: Vignesh C, Sawada Masahiko
Discussion: https://postgr.es/m/CAHut+PuCznOyTqBQwjRUu-ibG-=KHyCv-0FTcWQtZUdR88umfg@mail.gmail.com
This commit is contained in:
Amit Kapila
2023-03-17 08:29:41 +05:30
parent eb7d043c9b
commit e709596b25
4 changed files with 41 additions and 33 deletions

View File

@ -249,6 +249,24 @@ typedef struct ReorderBufferChange
((txn)->txn_flags & RBTXN_SKIPPED_PREPARE) != 0 \
)
/* Is this a top-level transaction? */
#define rbtxn_is_toptxn(txn) \
( \
(txn)->toptxn == NULL \
)
/* Is this a subtransaction? */
#define rbtxn_is_subtxn(txn) \
( \
(txn)->toptxn != NULL \
)
/* Get the top-level transaction of this (sub)transaction. */
#define rbtxn_get_toptxn(txn) \
( \
rbtxn_is_subtxn(txn) ? (txn)->toptxn : (txn) \
)
typedef struct ReorderBufferTXN
{
/* See above */