OpenShot Audio Library | OpenShotAudio  0.3.2
juce_ArrayAllocationBase.h
1 /*
2  ==============================================================================
3 
4  This file is part of the JUCE library.
5  Copyright (c) 2017 - ROLI Ltd.
6 
7  JUCE is an open source library subject to commercial or open-source
8  licensing.
9 
10  The code included in this file is provided under the terms of the ISC license
11  http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12  To use, copy, modify, and/or distribute this software for any purpose with or
13  without fee is hereby granted provided that the above copyright notice and
14  this permission notice appear in all copies.
15 
16  JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17  EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18  DISCLAIMED.
19 
20  ==============================================================================
21 */
22 
23 namespace juce
24 {
25 
26 //==============================================================================
36 template <class ElementType, class TypeOfCriticalSectionToUse>
37 class ArrayAllocationBase : public TypeOfCriticalSectionToUse
38 {
39 public:
40  //==============================================================================
42  ArrayAllocationBase() = default;
43 
45  ~ArrayAllocationBase() = default;
46 
47  ArrayAllocationBase (ArrayAllocationBase&& other) noexcept
48  : elements (std::move (other.elements)),
49  numAllocated (other.numAllocated)
50  {
51  }
52 
53  ArrayAllocationBase& operator= (ArrayAllocationBase&& other) noexcept
54  {
55  elements = std::move (other.elements);
56  numAllocated = other.numAllocated;
57  return *this;
58  }
59 
60  //==============================================================================
68  void setAllocatedSize (int numElements)
69  {
70  if (numAllocated != numElements)
71  {
72  if (numElements > 0)
73  elements.realloc ((size_t) numElements);
74  else
75  elements.free();
76 
77  numAllocated = numElements;
78  }
79  }
80 
89  void ensureAllocatedSize (int minNumElements)
90  {
91  if (minNumElements > numAllocated)
92  setAllocatedSize ((minNumElements + minNumElements / 2 + 8) & ~7);
93 
94  jassert (numAllocated <= 0 || elements != nullptr);
95  }
96 
100  void shrinkToNoMoreThan (int maxNumElements)
101  {
102  if (maxNumElements < numAllocated)
103  setAllocatedSize (maxNumElements);
104  }
105 
107  void swapWith (ArrayAllocationBase& other) noexcept
108  {
109  elements.swapWith (other.elements);
110  std::swap (numAllocated, other.numAllocated);
111  }
112 
113  //==============================================================================
114  HeapBlock<ElementType> elements;
115  int numAllocated = 0;
116 
117 private:
118  JUCE_DECLARE_NON_COPYABLE (ArrayAllocationBase)
119 };
120 
121 } // namespace juce
void shrinkToNoMoreThan(int maxNumElements)
void ensureAllocatedSize(int minNumElements)
void setAllocatedSize(int numElements)
void swapWith(ArrayAllocationBase &other) noexcept