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Viewing changes to drizzled/function/get_system_var.h

  • Committer: Stewart Smith
  • Author(s): Vasil Dimov, Stewart Smith
  • Date: 2010-12-20 02:24:00 UTC
  • mto: (2021.1.2 build)
  • mto: This revision was merged to the branch mainline in revision 2022.
  • Revision ID: stewart@flamingspork.com-20101220022400-0p9lvvppwgaowdju
Merge Revision revid:vasil.dimov@oracle.com-20101102165720-164z3666y3tut4c2 from MySQL InnoDB

Original revid:vasil.dimov@oracle.com-20101102165720-164z3666y3tut4c2

Original Authors: Vasil Dimov <vasil.dimov@oracle.com>
Original commit message:
Fix Bug#53046 dict_update_statistics_low can still be run concurrently on same table

Replace the array of mutexes that used to protect
dict_index_t::stat_n_diff_key_vals[] with an array of rw locks that protects
all the stats related members in dict_table_t and all of its indexes.

Approved by:    Jimmy (rb://503)

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drizzled/function/get_system_var.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, Inc.
 
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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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#define DRIZZLED_FUNCTION_GET_SYSTEM_VAR_H
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#include <drizzled/function/func.h>
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#include <drizzled/lex_string.h>
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namespace drizzled
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{
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class sys_var;
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Item *get_system_var(Session *session, sql_var_t var_type, LEX_STRING name,
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                     LEX_STRING component);
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  sys_var *var;
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  sql_var_t var_type;
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  LEX_STRING component;
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public:
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  Item_func_get_system_var(sys_var *var_arg, sql_var_t var_type_arg,
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                           LEX_STRING *component_arg, const char *name_arg,