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<concept id="GUID-63C60154-2A50-5A39-A188-515A607F498B" xml:lang="en"><title>Array

of same length elements, flat buffer</title><shortdesc>Describes how elements are organised within the array buffer.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>This can be either an <codeph>RArray&lt;class T&gt;</codeph> or a <codeph>CArrayFixFlat&lt;class T&gt;</codeph> object.</p>

<p>In both arrays, all elements:</p>

<ul>

<li id="GUID-9A6138C3-BBB5-5D8E-B0CB-9E51E1B2C59C"><p>have the same length.</p> </li>

<li id="GUID-A68AD60D-1077-5425-869C-619EDC70F4DF"><p>are physically contiguous

within a flat array buffer. The length of an element is the size of the template

class.</p> </li>

</ul>

<p>A flat buffer always occupies a single cell allocated from the heap and

is always extended by the process of reallocation.</p>

<p>The following diagram illustrates how elements are organised within the

array buffer:</p>

<fig id="GUID-7E9AF455-9CC4-5814-A746-36A94585488F">

<image href="GUID-516D2E22-F5C0-56FE-ABDA-948F01CD50DB_d0e215568_href.png" placement="inline"/>

</fig>

<p>This kind of array is suitable for a small number of elements or for a

moderately large but fixed maximum number of elements. It is not suitable

for large arrays with a high turnover of elements.</p>

<p>The <codeph>RArray&lt;class T&gt;</codeph> array has the simpler and

more efficient implementation but the length of an element is limited to 640

bytes. This array can also be constructed on te program stack.</p>

<p>The <codeph>CArrayFixFlat&lt;class T&gt;</codeph> array is more general

and is allocated on the heap. This class is immediately derived from the abstract

templated base class <codeph>CArrayFix&lt;class T&gt;</codeph> which is

itself derived from the abstract non-template base class <codeph>CArrayFixBase</codeph>.

Its array buffer is implemented using a <codeph>CBufFlat</codeph> object.</p>

<section id="GUID-AED136DE-81CB-4247-ADF7-283C6061D4D9"><title>See also</title> <p><xref href="GUID-112AAFA5-B4C9-5B62-A106-FB5097C13A0E.dita">Using

Dynamic Buffers </xref>.</p> </section>