(ed7d59c0a266bf578c3a9203c0107ab2ed29f067)

#include <QtCore/qarraydata.h>
#include <QtCore/private/qnumeric_p.h>
#include <QtCore/private/qtools_p.h>
#include <QtCore/qmath.h>
#include <QtCore/qbytearray.h>
#include <QtCore/qstring.h>
#include <stdlib.h>

Include dependency graph for qarraydata.cpp:

Go to the source code of this file.

Classes
struct	AlignedQArrayData

Functions
QT_BEGIN_NAMESPACE qsizetype	qCalculateBlockSize (qsizetype elementCount, qsizetype elementSize, qsizetype headerSize) noexcept

CalculateGrowingBlockSizeResult	qCalculateGrowingBlockSize (qsizetype elementCount, qsizetype elementSize, qsizetype headerSize) noexcept

static CalculateGrowingBlockSizeResult	calculateBlockSize (qsizetype capacity, qsizetype objectSize, qsizetype headerSize, QArrayData::AllocationOption option)

static AllocationResult	allocateHelper (qsizetype objectSize, qsizetype alignment, qsizetype capacity, QArrayData::AllocationOption option) noexcept

Function Documentation

◆ allocateHelper()

static AllocationResult allocateHelper	(	qsizetype	objectSize,
		qsizetype	alignment,
		qsizetype	capacity,
		QArrayData::AllocationOption	option )

inlinestaticnoexcept

Definition at line 146 of file qarraydata.cpp.

◆ calculateBlockSize()

static CalculateGrowingBlockSizeResult calculateBlockSize	(	qsizetype	capacity,
		qsizetype	objectSize,
		qsizetype	headerSize,
		QArrayData::AllocationOption	option )

inlinestatic

Definition at line 119 of file qarraydata.cpp.

◆ qCalculateBlockSize()

QT_BEGIN_NAMESPACE qsizetype qCalculateBlockSize	(	qsizetype	elementCount,
		qsizetype	elementSize,
		qsizetype	headerSize )

noexcept

Since: 5.7

Returns the memory block size for a container containing elementCount elements, each of elementSize bytes, plus a header of headerSize bytes. That is, this function returns {elementCount * elementSize + headerSize}

but unlike the simple calculation, it checks for overflows during the multiplication and the addition.

Both elementCount and headerSize can be zero, but elementSize cannot.

This function returns -1 on overflow or if the memory block size would not fit a qsizetype.

Definition at line 52 of file qarraydata.cpp.

◆ qCalculateGrowingBlockSize()

CalculateGrowingBlockSizeResult qCalculateGrowingBlockSize	(	qsizetype	elementCount,
		qsizetype	elementSize,
		qsizetype	headerSize )

noexcept

Since: 5.7

Returns the memory block size and the number of elements that will fit in that block for a container containing elementCount elements, each of elementSize bytes, plus a header of headerSize bytes. This function assumes the container will grow and pre-allocates a growth factor.