diff options
Diffstat (limited to 'src/include/access/xlogdefs.h')
| -rw-r--r-- | src/include/access/xlogdefs.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/include/access/xlogdefs.h b/src/include/access/xlogdefs.h index 8f524df75e2..8ecc3a21b1c 100644 --- a/src/include/access/xlogdefs.h +++ b/src/include/access/xlogdefs.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/xlogdefs.h,v 1.24 2010/01/02 16:58:01 momjian Exp $ + * $PostgreSQL: pgsql/src/include/access/xlogdefs.h,v 1.25 2010/01/15 09:19:06 heikki Exp $ */ #ifndef XLOG_DEFS_H #define XLOG_DEFS_H @@ -57,6 +57,22 @@ typedef struct XLogRecPtr /* + * Macro for advancing a record pointer by the specified number of bytes. + */ +#define XLByteAdvance(recptr, nbytes) \ + do { \ + if (recptr.xrecoff + nbytes >= XLogFileSize) \ + { \ + recptr.xlogid += 1; \ + recptr.xrecoff \ + = recptr.xrecoff + nbytes - XLogFileSize; \ + } \ + else \ + recptr.xrecoff += nbytes; \ + } while (0) + + +/* * TimeLineID (TLI) - identifies different database histories to prevent * confusion after restoring a prior state of a database installation. * TLI does not change in a normal stop/restart of the database (including |