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Use macros instead of hardcoded offsets for LWLock initialization

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This makes the code slightly easier to follow, as the initialization
relies on an offset that overlapped with an equivalent set of macros
defined, which are used in other places already.

Author: Japin Li
Discussion: https://postgr.es/m/MEYP282MB1669FB410006758402F2C3A2B6E00@MEYP282MB1669.AUSP282.PROD.OUTLOOK.COM
This commit is contained in:
Michael Paquier 2020-11-24 12:39:58 +09:00
parent 789b938bf2
commit d03d7549b2
1 changed files with 3 additions and 4 deletions
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7
src/backend/storage/lmgr/lwlock.c
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@ -525,18 +525,17 @@ InitializeLWLocks(void)
LWLockInitialize(&lock->lock, id);
/* Initialize buffer mapping LWLocks in main array */
lock = MainLWLockArray + NUM_INDIVIDUAL_LWLOCKS;
lock = MainLWLockArray + BUFFER_MAPPING_LWLOCK_OFFSET;
for (id = 0; id < NUM_BUFFER_PARTITIONS; id++, lock++)
LWLockInitialize(&lock->lock, LWTRANCHE_BUFFER_MAPPING);
/* Initialize lmgrs' LWLocks in main array */
lock = MainLWLockArray + NUM_INDIVIDUAL_LWLOCKS + NUM_BUFFER_PARTITIONS;
lock = MainLWLockArray + LOCK_MANAGER_LWLOCK_OFFSET;
for (id = 0; id < NUM_LOCK_PARTITIONS; id++, lock++)
LWLockInitialize(&lock->lock, LWTRANCHE_LOCK_MANAGER);
/* Initialize predicate lmgrs' LWLocks in main array */
lock = MainLWLockArray + NUM_INDIVIDUAL_LWLOCKS +
NUM_BUFFER_PARTITIONS + NUM_LOCK_PARTITIONS;
lock = MainLWLockArray + PREDICATELOCK_MANAGER_LWLOCK_OFFSET;
for (id = 0; id < NUM_PREDICATELOCK_PARTITIONS; id++, lock++)
LWLockInitialize(&lock->lock, LWTRANCHE_PREDICATE_LOCK_MANAGER);