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| author | Andres Freund <andres@anarazel.de> | 2020-06-08 15:25:49 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2020-06-17 12:51:09 -0700 |
| commit | 276bdc93924afb2bd793627f49a9e7edd4172b63 (patch) | |
| tree | 909bbebc1aaad0a947f877a52ecd9f02f0a3b78e /src/backend | |
| parent | 09bff91b316e90bf7f523593c1e8000c772cbe52 (diff) | |
| download | postgresql-276bdc93924afb2bd793627f49a9e7edd4172b63.tar.gz postgresql-276bdc93924afb2bd793627f49a9e7edd4172b63.zip | |
spinlock emulation: Fix bug when more than INT_MAX spinlocks are initialized.
Once the counter goes negative we ended up with spinlocks that errored
out on first use (due to check in tas_sema).
Author: Andres Freund
Reviewed-By: Robert Haas
Discussion: https://postgr.es/m/20200606023103.avzrctgv7476xj7i@alap3.anarazel.de
Backpatch: 9.5-
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/storage/lmgr/spin.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/storage/lmgr/spin.c b/src/backend/storage/lmgr/spin.c index 4d2a4c6641a..753943e46d6 100644 --- a/src/backend/storage/lmgr/spin.c +++ b/src/backend/storage/lmgr/spin.c @@ -106,7 +106,7 @@ SpinlockSemaInit(void) void s_init_lock_sema(volatile slock_t *lock, bool nested) { - static int counter = 0; + static uint32 counter = 0; *lock = ((++counter) % NUM_SPINLOCK_SEMAPHORES) + 1; } |