1 files changed, 80 insertions, 0 deletions
diff --git a/storage/maria/ma_control_file.h b/storage/maria/ma_control_file.h
new file mode 100644
index 00000000000..88a1780543a
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+++ b/storage/maria/ma_control_file.h
@@ -0,0 +1,80 @@
+/* Copyright (C) 2006 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+/*
+  WL#3234 Maria control file
+  First version written by Guilhem Bichot on 2006-04-27.
+*/
+
+#ifndef _ma_control_file_h
+#define _ma_control_file_h
+
+#define CONTROL_FILE_BASE_NAME "maria_log_control"
+
+/* Here is the interface of this module */
+
+/*
+  LSN of the last checkoint
+  (if last_checkpoint_lsn == LSN_IMPOSSIBLE then there was never a checkpoint)
+*/
+extern LSN last_checkpoint_lsn;
+/*
+  Last log number (if last_logno == FILENO_IMPOSSIBLE then there is no log
+  file yet)
+*/
+extern uint32 last_logno;
+
+extern my_bool maria_multi_threaded, maria_in_recovery;
+
+typedef enum enum_control_file_error {
+  CONTROL_FILE_OK= 0,
+  CONTROL_FILE_TOO_SMALL,
+  CONTROL_FILE_TOO_BIG,
+  CONTROL_FILE_BAD_MAGIC_STRING,
+  CONTROL_FILE_BAD_CHECKSUM,
+  CONTROL_FILE_MISSING,
+  CONTROL_FILE_UNKNOWN_ERROR /* any other error */
+} CONTROL_FILE_ERROR;
+
+#define CONTROL_FILE_UPDATE_ALL 0
+#define CONTROL_FILE_UPDATE_ONLY_LSN 1
+#define CONTROL_FILE_UPDATE_ONLY_LOGNO 2
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+  Looks for the control file. If none and creation was requested, creates file.
+  If present, reads it to find out last checkpoint's LSN and last log.
+  Called at engine's start.
+*/
+CONTROL_FILE_ERROR ma_control_file_create_or_open();
+/*
+  Write information durably to the control file.
+  Called when we have created a new log (after syncing this log's creation)
+  and when we have written a checkpoint (after syncing this log record).
+*/
+int ma_control_file_write_and_force(const LSN checkpoint_lsn, uint32 logno,
+                                    uint objs_to_write);
+
+
+/* Free resources taken by control file subsystem */
+int ma_control_file_end();
+
+#ifdef	__cplusplus
+}
+#endif
+#endif