mwilliams
1626223e97
Empty FixedStringMaps would do a malloc of at least 9 bytes, and IndexedStringMap would do a 1 byte malloc, and a malloc of at least 9 bytes. We have a lot of typically empty maps in our data structures.
54 linhas
1.9 KiB
C++
54 linhas
1.9 KiB
C++
/*
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+----------------------------------------------------------------------+
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| HipHop for PHP |
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+----------------------------------------------------------------------+
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| Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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*/
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#ifndef incl_HPHP_FIXED_STRING_MAP_H_
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#define incl_HPHP_FIXED_STRING_MAP_H_
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#include "hphp/util/base.h"
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#include "hphp/runtime/base/string_data.h"
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namespace HPHP {
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///////////////////////////////////////////////////////////////////////////////
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template <typename V, bool case_sensitive> class FixedStringMap {
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public:
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explicit FixedStringMap(int num) : m_table(0) { init(num); }
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FixedStringMap() : m_mask(0), m_table(0) {}
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~FixedStringMap();
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void init(int num);
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void add(const StringData* s, const V& v);
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V *find(const StringData* s) const;
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private:
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FixedStringMap(const FixedStringMap&);
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const FixedStringMap& operator=(const FixedStringMap&);
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struct Elm {
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const StringData* sd;
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V data;
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};
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/* Elements. */
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unsigned m_mask;
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Elm* m_table;
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};
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///////////////////////////////////////////////////////////////////////////////
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}
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#endif // incl_HPHP_FIXED_STRING_MAP_H_
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