diff options
Diffstat (limited to 'src/include/storage/bufmgr.h')
| -rw-r--r-- | src/include/storage/bufmgr.h | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/src/include/storage/bufmgr.h b/src/include/storage/bufmgr.h index 6ad711b071e..d503d56eba7 100644 --- a/src/include/storage/bufmgr.h +++ b/src/include/storage/bufmgr.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.111 2008/01/01 19:45:58 momjian Exp $ + * $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.112 2008/06/08 22:00:48 alvherre Exp $ * *------------------------------------------------------------------------- */ @@ -15,6 +15,7 @@ #define BUFMGR_H #include "storage/buf.h" +#include "storage/bufpage.h" #include "utils/rel.h" typedef void *Block; @@ -115,6 +116,29 @@ extern PGDLLIMPORT int32 *LocalRefCount; ) /* + * BufferGetPageSize + * Returns the page size within a buffer. + * + * Notes: + * Assumes buffer is valid. + * + * The buffer can be a raw disk block and need not contain a valid + * (formatted) disk page. + */ +/* XXX should dig out of buffer descriptor */ +#define BufferGetPageSize(buffer) \ +( \ + AssertMacro(BufferIsValid(buffer)), \ + (Size)BLCKSZ \ +) + +/* + * BufferGetPage + * Returns the page associated with a buffer. + */ +#define BufferGetPage(buffer) ((Page)BufferGetBlock(buffer)) + +/* * prototypes for functions in bufmgr.c */ extern Buffer ReadBuffer(Relation reln, BlockNumber blockNum); |