diff options
Diffstat (limited to 'src/include/storage/buf.h')
| -rw-r--r-- | src/include/storage/buf.h | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/src/include/storage/buf.h b/src/include/storage/buf.h index c65e4cc9975..f31d5d5cc8d 100644 --- a/src/include/storage/buf.h +++ b/src/include/storage/buf.h @@ -7,17 +7,22 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: buf.h,v 1.8 2001/01/24 19:43:27 momjian Exp $ + * $Id: buf.h,v 1.9 2001/06/09 18:16:59 tgl Exp $ * *------------------------------------------------------------------------- */ #ifndef BUF_H #define BUF_H -#define InvalidBuffer (0) -#define UnknownBuffer (-99999) +/* + * Buffer identifiers. + * + * Zero is invalid, positive is the index of a shared buffer (1..NBuffers), + * negative is the index of a local buffer (-1 .. -NLocBuffer). + */ +typedef int Buffer; -typedef long Buffer; +#define InvalidBuffer 0 /* * BufferIsInvalid @@ -26,12 +31,6 @@ typedef long Buffer; #define BufferIsInvalid(buffer) ((buffer) == InvalidBuffer) /* - * BufferIsUnknown - * True iff the buffer is unknown. - */ -#define BufferIsUnknown(buffer) ((buffer) == UnknownBuffer) - -/* * BufferIsLocal * True iff the buffer is local (not visible to other servers). */ |