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/*
==============================================================================
This file is part of the JUCE framework.
Copyright (c) Raw Material Software Limited
JUCE is an open source framework subject to commercial or open source
licensing.
By downloading, installing, or using the JUCE framework, or combining the
JUCE framework with any other source code, object code, content or any other
copyrightable work, you agree to the terms of the JUCE End User Licence
Agreement, and all incorporated terms including the JUCE Privacy Policy and
the JUCE Website Terms of Service, as applicable, which will bind you. If you
do not agree to the terms of these agreements, we will not license the JUCE
framework to you, and you must discontinue the installation or download
process and cease use of the JUCE framework.
JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
JUCE Privacy Policy: https://juce.com/juce-privacy-policy
JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
Or:
You may also use this code under the terms of the AGPLv3:
https://www.gnu.org/licenses/agpl-3.0.en.html
THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
==============================================================================
*/
namespace juce
{
//==============================================================================
/**
Implements some basic array storage allocation functions.
This class isn't really for public use - it used to be part of the
container classes but has since been superseded by ArrayBase. Eventually
it will be removed from the API.
@tags{Core}
*/
template <class ElementType, class TypeOfCriticalSectionToUse>
class ArrayAllocationBase : public TypeOfCriticalSectionToUse
{
public:
//==============================================================================
/** Creates an empty array. */
ArrayAllocationBase() = default;
/** Destructor. */
~ArrayAllocationBase() = default;
ArrayAllocationBase (ArrayAllocationBase&& other) noexcept
: elements (std::move (other.elements)),
numAllocated (other.numAllocated)
{
}
ArrayAllocationBase& operator= (ArrayAllocationBase&& other) noexcept
{
elements = std::move (other.elements);
numAllocated = other.numAllocated;
return *this;
}
//==============================================================================
/** Changes the amount of storage allocated.
This will retain any data currently held in the array, and either add or
remove extra space at the end.
@param numElements the number of elements that are needed
*/
void setAllocatedSize (int numElements)
{
if (numAllocated != numElements)
{
if (numElements > 0)
elements.realloc ((size_t) numElements);
else
elements.free();
numAllocated = numElements;
}
}
/** Increases the amount of storage allocated if it is less than a given amount.
This will retain any data currently held in the array, but will add
extra space at the end to make sure there it's at least as big as the size
passed in. If it's already bigger, no action is taken.
@param minNumElements the minimum number of elements that are needed
*/
void ensureAllocatedSize (int minNumElements)
{
if (minNumElements > numAllocated)
setAllocatedSize ((minNumElements + minNumElements / 2 + 8) & ~7);
jassert (numAllocated <= 0 || elements != nullptr);
}
/** Minimises the amount of storage allocated so that it's no more than
the given number of elements.
*/
void shrinkToNoMoreThan (int maxNumElements)
{
if (maxNumElements < numAllocated)
setAllocatedSize (maxNumElements);
}
/** Swap the contents of two objects. */
void swapWith (ArrayAllocationBase& other) noexcept
{
elements.swapWith (other.elements);
std::swap (numAllocated, other.numAllocated);
}
//==============================================================================
HeapBlock<ElementType> elements;
int numAllocated = 0;
private:
JUCE_DECLARE_NON_COPYABLE (ArrayAllocationBase)
};
} // namespace juce
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