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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
juce::ArrayAllocationBase
Definition: juce_ArrayAllocationBase.h:38
juce::ArrayAllocationBase::shrinkToNoMoreThan
void shrinkToNoMoreThan(int maxNumElements)
Definition: juce_ArrayAllocationBase.h:100
juce::ArrayAllocationBase::ArrayAllocationBase
ArrayAllocationBase()=default
juce::ArrayAllocationBase::~ArrayAllocationBase
~ArrayAllocationBase()=default
juce::ArrayAllocationBase::ensureAllocatedSize
void ensureAllocatedSize(int minNumElements)
Definition: juce_ArrayAllocationBase.h:89
juce::ArrayAllocationBase::setAllocatedSize
void setAllocatedSize(int numElements)
Definition: juce_ArrayAllocationBase.h:68
juce::ArrayAllocationBase::swapWith
void swapWith(ArrayAllocationBase &other) noexcept
Definition: juce_ArrayAllocationBase.h:107
juce::HeapBlock
Definition: juce_HeapBlock.h:87