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107 lines
3.6 KiB
107 lines
3.6 KiB
3 months ago
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/* Copyright (C) 2007 Google Inc.
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Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef SEMISYNC_H
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#define SEMISYNC_H
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#include <mysql/plugin.h>
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#include <mysql/components/services/log_builtins.h>
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#include "my_io.h"
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#include "my_thread.h"
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#include "mysqld_error.h"
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#include "sql/replication.h"
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struct SHOW_VAR;
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struct SYS_VAR;
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/**
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This class is used to trace function calls and other process
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information
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*/
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class Trace {
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public:
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static const unsigned long kTraceFunction;
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static const unsigned long kTraceGeneral;
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static const unsigned long kTraceDetail;
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static const unsigned long kTraceNetWait;
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unsigned long trace_level_; /* the level for tracing */
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inline void function_enter(const char *func_name) {
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if ((trace_level_ & kTraceFunction) && log_bi)
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LogErr(INFORMATION_LEVEL, ER_SEMISYNC_TRACE_ENTER_FUNC, func_name);
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}
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inline int function_exit(const char *func_name, int exit_code) {
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if ((trace_level_ & kTraceFunction) && log_bi)
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LogErr(INFORMATION_LEVEL, ER_SEMISYNC_TRACE_EXIT_WITH_INT_EXIT_CODE,
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func_name, exit_code);
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return exit_code;
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}
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inline bool function_exit(const char *func_name, bool exit_code) {
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if ((trace_level_ & kTraceFunction) && log_bi)
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LogErr(INFORMATION_LEVEL, ER_SEMISYNC_TRACE_EXIT_WITH_BOOL_EXIT_CODE,
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func_name, exit_code ? "True" : "False");
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return exit_code;
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}
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inline void function_exit(const char *func_name) {
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if ((trace_level_ & kTraceFunction) && log_bi)
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LogErr(INFORMATION_LEVEL, ER_SEMISYNC_TRACE_EXIT, func_name);
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}
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Trace() : trace_level_(0L) {}
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Trace(unsigned long trace_level) : trace_level_(trace_level) {}
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};
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/**
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Base class for semi-sync master and slave classes
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*/
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class ReplSemiSyncBase : public Trace {
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public:
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static const unsigned char kSyncHeader[2]; /* three byte packet header */
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/* Constants in network packet header. */
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static const unsigned char kPacketMagicNum;
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static const unsigned char kPacketFlagSync;
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};
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/* The layout of a semisync slave reply packet:
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1 byte for the magic num
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8 bytes for the binlog positon
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n bytes for the binlog filename, terminated with a '\0'
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*/
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#define REPLY_MAGIC_NUM_LEN 1
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#define REPLY_BINLOG_POS_LEN 8
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#define REPLY_BINLOG_NAME_LEN (FN_REFLEN + 1)
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#define REPLY_MESSAGE_MAX_LENGTH \
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(REPLY_MAGIC_NUM_LEN + REPLY_BINLOG_POS_LEN + REPLY_BINLOG_NAME_LEN)
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#define REPLY_MAGIC_NUM_OFFSET 0
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#define REPLY_BINLOG_POS_OFFSET (REPLY_MAGIC_NUM_OFFSET + REPLY_MAGIC_NUM_LEN)
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#define REPLY_BINLOG_NAME_OFFSET \
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(REPLY_BINLOG_POS_OFFSET + REPLY_BINLOG_POS_LEN)
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#endif /* SEMISYNC_H */
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