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96 lines
3.3 KiB
96 lines
3.3 KiB
/* Copyright (c) 2015, 2018, 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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#include "sql/system_variables.h"
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#include <string.h>
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/*
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Add all status variables to another status variable array
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SYNOPSIS
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add_to_status()
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to_var add to this array
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from_var from this array
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NOTES
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This function assumes that all variables are longlong/ulonglong.
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If this assumption will change, then we have to explictely add
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the other variables after the while loop
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*/
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void add_to_status(System_status_var *to_var, System_status_var *from_var) {
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int c;
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ulonglong *end = (ulonglong *)((uchar *)to_var +
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offsetof(System_status_var, LAST_STATUS_VAR) +
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sizeof(ulonglong));
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ulonglong *to = (ulonglong *)to_var, *from = (ulonglong *)from_var;
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while (to != end) *(to++) += *(from++);
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to_var->com_other += from_var->com_other;
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for (c = 0; c < SQLCOM_END; c++)
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to_var->com_stat[(uint)c] += from_var->com_stat[(uint)c];
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}
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/*
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Add the difference between two status variable arrays to another one.
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SYNOPSIS
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add_diff_to_status
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to_var add to this array
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from_var from this array
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dec_var minus this array
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NOTE
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This function assumes that all variables are longlong/ulonglong.
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*/
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void add_diff_to_status(System_status_var *to_var, System_status_var *from_var,
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System_status_var *dec_var) {
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int c;
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ulonglong *end = (ulonglong *)((uchar *)to_var +
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offsetof(System_status_var, LAST_STATUS_VAR) +
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sizeof(ulonglong));
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ulonglong *to = (ulonglong *)to_var, *from = (ulonglong *)from_var,
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*dec = (ulonglong *)dec_var;
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while (to != end) *(to++) += *(from++) - *(dec++);
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to_var->com_other += from_var->com_other - dec_var->com_other;
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for (c = 0; c < SQLCOM_END; c++)
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to_var->com_stat[(uint)c] +=
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from_var->com_stat[(uint)c] - dec_var->com_stat[(uint)c];
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}
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/*
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Reset a block of status variables.
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SYNOPSIS
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reset_system_status_vars
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status_vars Struct of status variables to reset
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*/
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void reset_system_status_vars(System_status_var *status_vars) {
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memset(status_vars, 0, sizeof(*status_vars));
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}
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