diff options
Diffstat (limited to 'src/backend/storage/buffer/freelist.c')
| -rw-r--r-- | src/backend/storage/buffer/freelist.c | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/src/backend/storage/buffer/freelist.c b/src/backend/storage/buffer/freelist.c index 4739512ad36..e204b0d0094 100644 --- a/src/backend/storage/buffer/freelist.c +++ b/src/backend/storage/buffer/freelist.c @@ -9,7 +9,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/storage/buffer/freelist.c,v 1.53 2005/10/12 16:45:13 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/storage/buffer/freelist.c,v 1.54 2005/10/15 02:49:25 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -28,11 +28,11 @@ typedef struct int nextVictimBuffer; int firstFreeBuffer; /* Head of list of unused buffers */ - int lastFreeBuffer; /* Tail of list of unused buffers */ + int lastFreeBuffer; /* Tail of list of unused buffers */ /* - * NOTE: lastFreeBuffer is undefined when firstFreeBuffer is -1 - * (that is, when the list is empty) + * NOTE: lastFreeBuffer is undefined when firstFreeBuffer is -1 (that is, + * when the list is empty) */ } BufferStrategyControl; @@ -79,10 +79,10 @@ StrategyGetBuffer(void) buf->freeNext = FREENEXT_NOT_IN_LIST; /* - * If the buffer is pinned or has a nonzero usage_count, - * we cannot use it; discard it and retry. (This can only happen - * if VACUUM put a valid buffer in the freelist and then someone - * else used it before we got to it.) + * If the buffer is pinned or has a nonzero usage_count, we cannot use + * it; discard it and retry. (This can only happen if VACUUM put a + * valid buffer in the freelist and then someone else used it before + * we got to it.) */ LockBufHdr(buf); if (buf->refcount == 0 && buf->usage_count == 0) @@ -100,8 +100,8 @@ StrategyGetBuffer(void) StrategyControl->nextVictimBuffer = 0; /* - * If the buffer is pinned or has a nonzero usage_count, - * we cannot use it; decrement the usage_count and keep scanning. + * If the buffer is pinned or has a nonzero usage_count, we cannot use + * it; decrement the usage_count and keep scanning. */ LockBufHdr(buf); if (buf->refcount == 0 && buf->usage_count == 0) @@ -114,11 +114,11 @@ StrategyGetBuffer(void) else if (--trycounter == 0) { /* - * We've scanned all the buffers without making any state - * changes, so all the buffers are pinned (or were when we - * looked at them). We could hope that someone will free - * one eventually, but it's probably better to fail than to - * risk getting stuck in an infinite loop. + * We've scanned all the buffers without making any state changes, + * so all the buffers are pinned (or were when we looked at them). + * We could hope that someone will free one eventually, but it's + * probably better to fail than to risk getting stuck in an + * infinite loop. */ UnlockBufHdr(buf); elog(ERROR, "no unpinned buffers available"); @@ -143,8 +143,8 @@ StrategyFreeBuffer(volatile BufferDesc *buf, bool at_head) LWLockAcquire(BufFreelistLock, LW_EXCLUSIVE); /* - * It is possible that we are told to put something in the freelist - * that is already in it; don't screw up the list if so. + * It is possible that we are told to put something in the freelist that + * is already in it; don't screw up the list if so. */ if (buf->freeNext == FREENEXT_NOT_IN_LIST) { @@ -181,8 +181,8 @@ StrategySyncStart(void) int result; /* - * We could probably dispense with the locking here, but just to be - * safe ... + * We could probably dispense with the locking here, but just to be safe + * ... */ LWLockAcquire(BufFreelistLock, LW_EXCLUSIVE); result = StrategyControl->nextVictimBuffer; |