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| author | Marc G. Fournier <scrappy@hub.org> | 1996-07-09 06:22:35 +0000 |
|---|---|---|
| committer | Marc G. Fournier <scrappy@hub.org> | 1996-07-09 06:22:35 +0000 |
| commit | d31084e9d1118b25fd16580d9d8c2924b5740dff (patch) | |
| tree | 3179e66307d54df9c7b966543550e601eb55e668 /src/backend/storage/pagenum.h | |
| download | postgresql-PG95-1_01.tar.gz postgresql-PG95-1_01.zip | |
Postgres95 1.01 Distribution - Virgin SourcesPG95-1_01
Diffstat (limited to 'src/backend/storage/pagenum.h')
| -rw-r--r-- | src/backend/storage/pagenum.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/backend/storage/pagenum.h b/src/backend/storage/pagenum.h new file mode 100644 index 00000000000..f32624c226d --- /dev/null +++ b/src/backend/storage/pagenum.h @@ -0,0 +1,33 @@ +/*------------------------------------------------------------------------- + * + * pagenum.h-- + * POSTGRES page number definitions. + * + * + * Copyright (c) 1994, Regents of the University of California + * + * $Id: pagenum.h,v 1.1.1.1 1996/07/09 06:21:53 scrappy Exp $ + * + *------------------------------------------------------------------------- + */ +#ifndef PAGENUM_H +#define PAGENUM_H + +#include "c.h" +#include "storage/page.h" + +typedef uint16 PageNumber; + +typedef uint32 LogicalPageNumber; + +#define InvalidLogicalPageNumber 0 + +/* + * LogicalPageNumberIsValid -- + * True iff the logical page number is valid. + */ +#define LogicalPageNumberIsValid(pageNumber) \ + ((bool)((pageNumber) != InvalidLogicalPageNumber)) + + +#endif /* PAGENUM_H */ |