Does MemoryBlock clear memory automatically somewhere?

DaveH · July 1, 2019, 9:21am

It feels like a silly question, so I do apologise if I’ve been getting far too much Sun lately, and it’s boiled my brains…
I just spotted this:-

MemoryBlock::~MemoryBlock() noexcept
{
}

Which doesn’t call ‘reset()’ at all, so why haven’t I been getting Memory Leak errors on shutdown?
Thanks.
Dave H.

daniel · July 1, 2019, 10:10am

It owns a HeapBlock as member, so when the member stack is unrolled, it triggers a free:

github.com

WeAreROLI/JUCE/blob/master/modules/juce_core/memory/juce_HeapBlock.h#L136


                                           : std::malloc (static_cast<size_t> (numElements) * sizeof (ElementType))))

{

    throwOnAllocationFailure();

}



/** Destructor.

    This will free the data, if any has been allocated.

*/

~HeapBlock()

{

    std::free (data);

}



/** Move constructor */

HeapBlock (HeapBlock&& other) noexcept

    : data (other.data)

{

    other.data = nullptr;

}



/** Move assignment operator */

DaveH · July 1, 2019, 10:31am

Excellent, thanks for the detailed reply. That’s great news.

DaveH · July 1, 2019, 10:44am

Hmm, putting breakpoint on that free tells me it gets called all the time from ‘internalProcessReplacing’ in the VST wrapper although it always seems to be null,

Also in ‘getCurrentDisplayFromScaleFactor’ which is always valid data which I think is part of an Array display list.

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Does MemoryBlock clear memory automatically somewhere?

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