diff options
Diffstat (limited to 'src/include/storage/buf_internals.h')
| -rw-r--r-- | src/include/storage/buf_internals.h | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/src/include/storage/buf_internals.h b/src/include/storage/buf_internals.h index e75f24a6ced..b2cbf3049e6 100644 --- a/src/include/storage/buf_internals.h +++ b/src/include/storage/buf_internals.h @@ -8,7 +8,7 @@ * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/storage/buf_internals.h,v 1.80 2005/10/12 16:45:14 tgl Exp $ + * $PostgreSQL: pgsql/src/include/storage/buf_internals.h,v 1.81 2005/10/15 02:49:46 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -31,13 +31,10 @@ #define BM_DIRTY (1 << 0) /* data needs writing */ #define BM_VALID (1 << 1) /* data is valid */ #define BM_TAG_VALID (1 << 2) /* tag is assigned */ -#define BM_IO_IN_PROGRESS (1 << 3) /* read or write in - * progress */ +#define BM_IO_IN_PROGRESS (1 << 3) /* read or write in progress */ #define BM_IO_ERROR (1 << 4) /* previous I/O failed */ -#define BM_JUST_DIRTIED (1 << 5) /* dirtied since write - * started */ -#define BM_PIN_COUNT_WAITER (1 << 6) /* have waiter for sole - * pin */ +#define BM_JUST_DIRTIED (1 << 5) /* dirtied since write started */ +#define BM_PIN_COUNT_WAITER (1 << 6) /* have waiter for sole pin */ typedef bits16 BufFlags; @@ -94,9 +91,9 @@ typedef struct buftag * * Note: buf_hdr_lock must be held to examine or change the tag, flags, * usage_count, refcount, or wait_backend_pid fields. buf_id field never - * changes after initialization, so does not need locking. freeNext is + * changes after initialization, so does not need locking. freeNext is * protected by the BufFreelistLock not buf_hdr_lock. The LWLocks can take - * care of themselves. The buf_hdr_lock is *not* used to control access to + * care of themselves. The buf_hdr_lock is *not* used to control access to * the data in the buffer! * * An exception is that if we have the buffer pinned, its tag can't change @@ -107,7 +104,7 @@ typedef struct buftag * * We can't physically remove items from a disk page if another backend has * the buffer pinned. Hence, a backend may need to wait for all other pins - * to go away. This is signaled by storing its own PID into + * to go away. This is signaled by storing its own PID into * wait_backend_pid and setting flag bit BM_PIN_COUNT_WAITER. At present, * there can be only one such waiter per buffer. * @@ -120,7 +117,7 @@ typedef struct sbufdesc BufFlags flags; /* see bit definitions above */ uint16 usage_count; /* usage counter for clock sweep code */ unsigned refcount; /* # of backends holding pins on buffer */ - int wait_backend_pid; /* backend PID of pin-count waiter */ + int wait_backend_pid; /* backend PID of pin-count waiter */ slock_t buf_hdr_lock; /* protects the above fields */ @@ -151,13 +148,13 @@ typedef struct sbufdesc * ensure that the compiler doesn't rearrange accesses to the header to * occur before or after the spinlock is acquired/released. */ -#define LockBufHdr(bufHdr) \ +#define LockBufHdr(bufHdr) \ SpinLockAcquire(&(bufHdr)->buf_hdr_lock) #define UnlockBufHdr(bufHdr) \ SpinLockRelease(&(bufHdr)->buf_hdr_lock) #define LockBufHdr_NoHoldoff(bufHdr) \ SpinLockAcquire_NoHoldoff(&(bufHdr)->buf_hdr_lock) -#define UnlockBufHdr_NoHoldoff(bufHdr) \ +#define UnlockBufHdr_NoHoldoff(bufHdr) \ SpinLockRelease_NoHoldoff(&(bufHdr)->buf_hdr_lock) @@ -191,7 +188,7 @@ extern Size StrategyShmemSize(void); extern void StrategyInitialize(bool init); /* buf_table.c */ -extern Size BufTableShmemSize(int size); +extern Size BufTableShmemSize(int size); extern void InitBufTable(int size); extern int BufTableLookup(BufferTag *tagPtr); extern int BufTableInsert(BufferTag *tagPtr, int buf_id); |