1 files changed, 73 insertions, 0 deletions
diff --git a/sql/semisync.h b/sql/semisync.h
new file mode 100644
index 00000000..44f23660
--- /dev/null
+++ b/sql/semisync.h
@@ -0,0 +1,73 @@
+/* Copyright (C) 2007 Google Inc.
+   Copyright (C) 2008 MySQL 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1335  USA */
+
+
+#ifndef SEMISYNC_H
+#define SEMISYNC_H
+
+#include "mysqld.h"
+#include "log_event.h"
+#include "replication.h"
+
+/**
+   This class is used to trace function calls and other process
+   information
+*/
+class Trace {
+public:
+  static const unsigned long k_trace_function;
+  static const unsigned long k_trace_general;
+  static const unsigned long k_trace_detail;
+  static const unsigned long k_trace_net_wait;
+
+  unsigned long           m_trace_level;                      /* the level for tracing */
+
+  Trace()
+    :m_trace_level(0L)
+  {}
+  Trace(unsigned long trace_level)
+    :m_trace_level(trace_level)
+  {}
+};
+
+/**
+   Base class for semi-sync master and slave classes
+*/
+class Repl_semi_sync_base
+  :public Trace {
+public:
+  static const unsigned char  k_sync_header[2];     /* three byte packet header */
+
+  /* Constants in network packet header. */
+  static const unsigned char k_packet_magic_num;
+  static const unsigned char k_packet_flag_sync;
+};
+
+/* The layout of a semisync slave reply packet:
+   1 byte for the magic num
+   8 bytes for the binlog positon
+   n bytes for the binlog filename, terminated with a '\0'
+*/
+#define REPLY_MAGIC_NUM_LEN 1
+#define REPLY_BINLOG_POS_LEN 8
+#define REPLY_BINLOG_NAME_LEN (FN_REFLEN + 1)
+#define REPLY_MAGIC_NUM_OFFSET 0
+#define REPLY_BINLOG_POS_OFFSET (REPLY_MAGIC_NUM_OFFSET + REPLY_MAGIC_NUM_LEN)
+#define REPLY_BINLOG_NAME_OFFSET (REPLY_BINLOG_POS_OFFSET + REPLY_BINLOG_POS_LEN)
+#define REPLY_MESSAGE_MAX_LENGTH \
+    (REPLY_MAGIC_NUM_LEN + REPLY_BINLOG_POS_LEN + REPLY_BINLOG_NAME_LEN)
+
+#endif /* SEMISYNC_H */