D7net
Home
Console
Upload
information
Create File
Create Folder
About
Tools
:
/
usr
/
include
/
mysql
/
server
/
private
/
Filename :
semisync.h
back
Copy
/* 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 */