diff options
Diffstat (limited to 'innobase/include/mtr0log.h')
| -rw-r--r-- | innobase/include/mtr0log.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/innobase/include/mtr0log.h b/innobase/include/mtr0log.h index 9c9c6f696e8..c0636ea1e1e 100644 --- a/innobase/include/mtr0log.h +++ b/innobase/include/mtr0log.h @@ -11,6 +11,7 @@ Created 12/7/1995 Heikki Tuuri #include "univ.i" #include "mtr0mtr.h" +#include "dict0types.h" /************************************************************ Writes 1 - 4 bytes to a file page buffered in the buffer pool. @@ -173,6 +174,38 @@ mlog_parse_string( byte* page); /* in: page where to apply the log record, or NULL */ +/************************************************************ +Opens a buffer for mlog, writes the initial log record and, +if needed, the field lengths of an index. Reserves space +for further log entries. The log entry must be closed with +mtr_close(). */ + +byte* +mlog_open_and_write_index( +/*======================*/ + /* out: buffer, NULL if log mode + MTR_LOG_NONE */ + mtr_t* mtr, /* in: mtr */ + byte* rec, /* in: index record or page */ + dict_index_t* index, /* in: record descriptor */ + byte type, /* in: log item type */ + ulint size); /* in: requested buffer size in bytes + (if 0, calls mlog_close() and returns NULL) */ + +/************************************************************ +Parses a log record written by mlog_open_and_write_index. */ + +byte* +mlog_parse_index( +/*=============*/ + /* out: parsed record end, + NULL if not a complete record */ + byte* ptr, /* in: buffer */ + byte* end_ptr,/* in: buffer end */ + /* out: new value of log_ptr */ + ibool comp, /* in: TRUE=compact record format */ + dict_index_t** index); /* out, own: dummy index */ + /* Insert, update, and maybe other functions may use this value to define an extra mlog buffer size for variable size data */ #define MLOG_BUF_MARGIN 256 |