diff options
| author | Andres Freund <andres@anarazel.de> | 2020-06-08 15:25:49 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2020-06-17 12:51:24 -0700 |
| commit | 660622053419fbb776c7218f2110500b3b034b35 (patch) | |
| tree | 2fa32850dbea9d9bffd86dbee7e6483975aa98dd | |
| parent | 5771d8b690e0f1b49bf8fc7f5e5cb8880bcd5ca7 (diff) | |
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-
| -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 50391414305..9b73e7e1851 100644 --- a/src/backend/storage/lmgr/spin.c +++ b/src/backend/storage/lmgr/spin.c @@ -97,7 +97,7 @@ SpinlockSemaInit(PGSemaphore spinsemas) 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; } |