0029151: GCC 7.1 warnings "this statement may fall through" [-Wimplicit-fallthrough=]
[occt.git] / src / NCollection / NCollection_LocalArray.hxx
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b311480e 1// Created on: 2009-09-23
973c2be1 2// Copyright (c) 2009-2014 OPEN CASCADE SAS
b311480e 3//
973c2be1 4// This file is part of Open CASCADE Technology software library.
b311480e 5//
d5f74e42 6// This library is free software; you can redistribute it and/or modify it under
7// the terms of the GNU Lesser General Public License version 2.1 as published
973c2be1 8// by the Free Software Foundation, with special exception defined in the file
9// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
10// distribution for complete text of the license and disclaimer of any warranty.
b311480e 11//
973c2be1 12// Alternatively, this file may be used under the terms of Open CASCADE
13// commercial license or contractual agreement.
41194117 14
f7b4312f 15#ifndef _NCollection_LocalArray_HeaderFile
16#define _NCollection_LocalArray_HeaderFile
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17
18#include <Standard.hxx>
19#include <Standard_TypeDef.hxx>
20
f7b4312f 21//! Auxiliary class optimizing creation of array buffer
22//! (using stack allocation for small arrays).
50bc8f96 23template<class theItem, Standard_Integer MAX_ARRAY_SIZE = 1024> class NCollection_LocalArray
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24{
25public:
26
f7b4312f 27 NCollection_LocalArray (const size_t theSize)
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28 : myPtr (myBuffer)
29 {
30 Allocate(theSize);
31 }
32
f7b4312f 33 NCollection_LocalArray ()
50bc8f96 34 : myPtr (myBuffer), mySize(0) {}
41194117 35
ddf2fe8e 36 ~NCollection_LocalArray()
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37 {
38 Deallocate();
39 }
40
41 void Allocate (const size_t theSize)
42 {
43 Deallocate();
44 if (theSize > MAX_ARRAY_SIZE)
f7b4312f 45 myPtr = (theItem*)Standard::Allocate (theSize * sizeof(theItem));
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46 else
47 myPtr = myBuffer;
50bc8f96 48
49 mySize = theSize;
50 }
51
52 size_t Size() const
53 {
54 return mySize;
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55 }
56
f7b4312f 57 operator theItem*() const
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58 {
59 return myPtr;
60 }
61
62private:
63
f7b4312f 64 NCollection_LocalArray (const NCollection_LocalArray& );
65 NCollection_LocalArray& operator= (const NCollection_LocalArray& );
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66
67protected:
68
69 void Deallocate()
70 {
71 if (myPtr != myBuffer)
547702a1 72 Standard::Free (myPtr);
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73 }
74
75protected:
76
f7b4312f 77 theItem myBuffer[MAX_ARRAY_SIZE];
78 theItem* myPtr;
50bc8f96 79 size_t mySize;
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80
81};
82
f7b4312f 83#endif // _NCollection_LocalArray_HeaderFile