diff options
Diffstat (limited to 'src/backend/access/transam/slru.c')
| -rw-r--r-- | src/backend/access/transam/slru.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/backend/access/transam/slru.c b/src/backend/access/transam/slru.c index fe56286d9a9..10ec259f382 100644 --- a/src/backend/access/transam/slru.c +++ b/src/backend/access/transam/slru.c @@ -434,6 +434,31 @@ SimpleLruZeroLSNs(SlruCtl ctl, int slotno) } /* + * This is a convenience wrapper for the common case of zeroing a page and + * immediately flushing it to disk. + * + * Control lock is acquired and released here. + */ +void +SimpleLruZeroAndWritePage(SlruCtl ctl, int64 pageno) +{ + int slotno; + LWLock *lock; + + lock = SimpleLruGetBankLock(ctl, pageno); + LWLockAcquire(lock, LW_EXCLUSIVE); + + /* Create and zero the page */ + slotno = SimpleLruZeroPage(ctl, pageno); + + /* Make sure it's written out */ + SimpleLruWritePage(ctl, slotno); + Assert(!ctl->shared->page_dirty[slotno]); + + LWLockRelease(lock); +} + +/* * Wait for any active I/O on a page slot to finish. (This does not * guarantee that new I/O hasn't been started before we return, though. * In fact the slot might not even contain the same page anymore.) |