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Fix WaitLatch(NULL) on Windows.

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Further to commit 733fa9aa, on Windows when a latch is triggered but we
aren't currently waiting for it, we need to locate the latch's HANDLE
rather than calling ResetEvent(NULL).

Author: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Reported-by: Ranier Vilela <ranier.vf@gmail.com>
Discussion: https://postgr.es/m/CAEudQArTPi1YBc%2Bn1fo0Asy3QBFhVjp_QgyKG-8yksVn%2ByRTiw%40mail.gmail.com
This commit is contained in:
Thomas Munro
2020-11-25 17:44:15 +13:00
parent 805b816305
commit a7e65dc88b
1 changed files with 5 additions and 1 deletions
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6
src/backend/storage/ipc/latch.c
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@ -1835,7 +1835,11 @@ WaitEventSetWaitBlock(WaitEventSet *set, int cur_timeout,
if (cur_event->events == WL_LATCH_SET) if (cur_event->events == WL_LATCH_SET)
{ {
if (!ResetEvent(set->latch->event)) /*
* We cannot use set->latch->event to reset the fired event if we
* aren't waiting on this latch now.
*/
if (!ResetEvent(set->handles[cur_event->pos + 1]))
elog(ERROR, "ResetEvent failed: error code %lu", GetLastError()); elog(ERROR, "ResetEvent failed: error code %lu", GetLastError());
if (set->latch && set->latch->is_set) if (set->latch && set->latch->is_set)