mirror of
https://github.com/MariaDB/server.git
synced 2025-01-19 05:22:25 +01:00
880026ccf6
Fixes for embedded server Made key_cache more configurable Fixed that one can change key blocksize in MyISAM A lot of optimizations to make MyISAM slightly faster
32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA */
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/* Some useful bit functions */
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#include "mysys_priv.h"
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/*
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Find smallest X in 2^X >= value
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This can be used to divide a number with value by doing a shift instead
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*/
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uint my_bit_log2(ulong value)
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{
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uint bit;
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for (bit=0 ; value > 1 ; value>>=1, bit++) ;
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return bit;
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}
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