diff options
Diffstat (limited to 'src/include/storage/bufpage.h')
| -rw-r--r-- | src/include/storage/bufpage.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/src/include/storage/bufpage.h b/src/include/storage/bufpage.h index 2be7093e4c..c0701fc963 100644 --- a/src/include/storage/bufpage.h +++ b/src/include/storage/bufpage.h @@ -6,7 +6,7 @@ * * Copyright (c) 1994, Regents of the University of California * - * $Id: bufpage.h,v 1.17 1998/02/26 04:43:24 momjian Exp $ + * $Id: bufpage.h,v 1.18 1998/04/24 14:43:23 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -280,6 +280,21 @@ typedef enum */ #define BufferGetPage(buffer) ((Page)BufferGetBlock(buffer)) +/* + * PageGetMaxOffsetNumber -- + * Returns the maximum offset number used by the given page. + * + * NOTE: The offset is invalid if the page is non-empty. + * Test whether PageIsEmpty before calling this routine + * and/or using its return value. + */ +#define PageGetMaxOffsetNumber(page) \ +( \ + (((PageHeader) (page))->pd_lower - \ + (sizeof(PageHeaderData) - sizeof(ItemIdData))) \ + / sizeof(ItemIdData) \ +) + /* ---------------------------------------------------------------- * extern declarations @@ -292,7 +307,6 @@ PageAddItem(Page page, Item item, Size size, OffsetNumber offsetNumber, ItemIdFlags flags); extern Page PageGetTempPage(Page page, Size specialSize); extern void PageRestoreTempPage(Page tempPage, Page oldPage); -extern OffsetNumber PageGetMaxOffsetNumber(Page page); extern void PageRepairFragmentation(Page page); extern Size PageGetFreeSpace(Page page); extern void PageManagerModeSet(PageManagerMode mode); |