103 lines
3.6 KiB
C
103 lines
3.6 KiB
C
/* Copyright (c) 2014, 2022, Oracle and/or its affiliates.
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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 MYSQL_SERVICE_TRANSACTION_WRITE_SET_INCLUDED
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/**
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@file include/mysql/service_rpl_transaction_write_set.h
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This service provides a function for plugins to get the write set of a given
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transaction.
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SYNOPSIS
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get_transaction_write_set()
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This service is used to fetch the write_set extracted for the currently
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executing transaction by passing the thread_id as an input parameter for
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the method.
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@param [in] - thread_id - It is the thread identifier of the currently
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executing thread.
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In the current implementation it is being called during RUN_HOOK macro,
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on which we know that thread is on plugin context.
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Cleanup :
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The service caller must take of the memory allocated during the service
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call to prevent memory leaks.
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*/
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#ifndef MYSQL_ABI_CHECK
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#include <stdlib.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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This structure is used to keep the list of the hash values of the records
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changed in the transaction.
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*/
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struct st_trans_write_set
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{
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unsigned int m_flags; // reserved
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unsigned long write_set_size; // Size of the PKE set of the transaction.
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unsigned long long* write_set; // A pointer to the PKE set.
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};
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typedef struct st_trans_write_set Transaction_write_set;
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extern struct transaction_write_set_service_st {
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Transaction_write_set* (*get_transaction_write_set)(unsigned long m_thread_id);
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void (*require_full_write_set)(int requires_ws);
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void (*set_write_set_memory_size_limit)(long long size_limit);
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void (*update_write_set_memory_size_limit)(long long size_limit);
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} *transaction_write_set_service;
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#ifdef MYSQL_DYNAMIC_PLUGIN
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#define get_transaction_write_set(m_thread_id) \
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(transaction_write_set_service->get_transaction_write_set((m_thread_id)))
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#define require_full_write_set(requires_ws) \
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transaction_write_set_service->require_full_write_set(requires_ws)
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#define set_write_set_memory_size_limit(size_limit) \
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transaction_write_set_service->set_write_set_memory_size_limit(size_limit)
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#define update_write_set_memory_size_limit(size_limit) \
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transaction_write_set_service->update_write_set_memory_size_limit(size_limit)
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#else
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Transaction_write_set* get_transaction_write_set(unsigned long m_thread_id);
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void require_full_write_set(int requires_ws);
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void set_write_set_memory_size_limit(long long size_limit);
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void update_write_set_memory_size_limit(long long size_limit);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#define MYSQL_SERVICE_TRANSACTION_WRITE_SET_INCLUDED
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#endif
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