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575.1.3
by Monty Taylor
Moved some stuff out of handler.h. |
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (C) 2008 Sun Microsystems
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*
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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 as published by
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* the Free Software Foundation; version 2 of the License.
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*
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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 for more details.
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*
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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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*/
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#ifndef DRIZZLED_HA_TRX_INFO_H
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#define DRIZZLED_HA_TRX_INFO_H
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584.1.13
by Monty Taylor
Split out a little more code. Removed table_list.h from common_includes. |
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class Session_TRANS; |
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class handlerton; |
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575.1.3
by Monty Taylor
Moved some stuff out of handler.h. |
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/**
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Either statement transaction or normal transaction - related
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thread-specific storage engine data.
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If a storage engine participates in a statement/transaction,
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an instance of this class is present in
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session->transaction.{stmt|all}.ha_list. The addition to
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{stmt|all}.ha_list is made by trans_register_ha().
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When it's time to commit or rollback, each element of ha_list
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is used to access storage engine's prepare()/commit()/rollback()
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methods, and also to evaluate if a full two phase commit is
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necessary.
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@sa General description of transaction handling in handler.cc.
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*/
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class Ha_trx_info |
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{
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public: |
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/** Register this storage engine in the given transaction context. */
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584.1.13
by Monty Taylor
Split out a little more code. Removed table_list.h from common_includes. |
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void register_ha(Session_TRANS *trans, handlerton *ht_arg); |
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575.1.3
by Monty Taylor
Moved some stuff out of handler.h. |
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/** Clear, prepare for reuse. */
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584.1.13
by Monty Taylor
Split out a little more code. Removed table_list.h from common_includes. |
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void reset(); |
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575.1.3
by Monty Taylor
Moved some stuff out of handler.h. |
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Ha_trx_info() { reset(); } |
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584.1.13
by Monty Taylor
Split out a little more code. Removed table_list.h from common_includes. |
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void set_trx_read_write(); |
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bool is_trx_read_write() const; |
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bool is_started() const; |
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575.1.3
by Monty Taylor
Moved some stuff out of handler.h. |
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/** Mark this transaction read-write if the argument is read-write. */
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584.1.13
by Monty Taylor
Split out a little more code. Removed table_list.h from common_includes. |
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void coalesce_trx_with(const Ha_trx_info *stmt_trx); |
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Ha_trx_info *next() const; |
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handlerton *ht() const; |
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575.1.3
by Monty Taylor
Moved some stuff out of handler.h. |
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private: |
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enum { TRX_READ_ONLY= 0, TRX_READ_WRITE= 1 }; |
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/** Auxiliary, used for ha_list management */
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Ha_trx_info *m_next; |
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/**
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Although a given Ha_trx_info instance is currently always used
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for the same storage engine, 'ht' is not-NULL only when the
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corresponding storage is a part of a transaction.
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*/
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handlerton *m_ht; |
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/**
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Transaction flags related to this engine.
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Not-null only if this instance is a part of transaction.
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May assume a combination of enum values above.
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*/
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unsigned char m_flags; |
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};
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#endif /* DRIZZLED_HA_TRX_INFO_H */ |