1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
<html lang="en">
<head>
<title>Mex-Files - Untitled</title>
<meta http-equiv="Content-Type" content="text/html">
<meta name="description" content="Untitled">
<meta name="generator" content="makeinfo 4.11">
<link title="Top" rel="start" href="index.html#Top">
<link rel="up" href="Dynamically-Linked-Functions.html#Dynamically-Linked-Functions" title="Dynamically Linked Functions">
<link rel="prev" href="Oct_002dFiles.html#Oct_002dFiles" title="Oct-Files">
<link rel="next" href="Standalone-Programs.html#Standalone-Programs" title="Standalone Programs">
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
<meta http-equiv="Content-Style-Type" content="text/css">
<style type="text/css"><!--
pre.display { font-family:inherit }
pre.format { font-family:inherit }
pre.smalldisplay { font-family:inherit; font-size:smaller }
pre.smallformat { font-family:inherit; font-size:smaller }
pre.smallexample { font-size:smaller }
pre.smalllisp { font-size:smaller }
span.sc { font-variant:small-caps }
span.roman { font-family:serif; font-weight:normal; }
span.sansserif { font-family:sans-serif; font-weight:normal; }
--></style>
</head>
<body>
<div class="node">
<p>
<a name="Mex-Files"></a>
<a name="Mex_002dFiles"></a>
Next: <a rel="next" accesskey="n" href="Standalone-Programs.html#Standalone-Programs">Standalone Programs</a>,
Previous: <a rel="previous" accesskey="p" href="Oct_002dFiles.html#Oct_002dFiles">Oct-Files</a>,
Up: <a rel="up" accesskey="u" href="Dynamically-Linked-Functions.html#Dynamically-Linked-Functions">Dynamically Linked Functions</a>
<hr>
</div>
<h3 class="section">A.2 Mex-Files</h3>
<p><a name="index-mex_002dfiles-2480"></a><a name="index-mex-2481"></a>
Octave includes an interface to allow legacy mex-files to be compiled
and used with Octave. This interface can also be used to share code
between Octave and non Octave users. However, as mex-files expose the
internal API of an alternative product to Octave, and the internal
structure of Octave is different to this product, a mex-file can never
have the same performance in Octave as the equivalent oct-file. In
particular to support the manner in which mex-files access the variables
passed to mex functions, there are a significant number of additional
copies of memory when calling or returning from a mex function. For
this reason, new code should be written using the oct-file interface
discussed above if possible.
<ul class="menu">
<li><a accesskey="1" href="Getting-Started-with-Mex_002dFiles.html#Getting-Started-with-Mex_002dFiles">Getting Started with Mex-Files</a>
<li><a accesskey="2" href="Working-with-Matrices-and-Arrays-in-Mex_002dFiles.html#Working-with-Matrices-and-Arrays-in-Mex_002dFiles">Working with Matrices and Arrays in Mex-Files</a>
<li><a accesskey="3" href="Character-Strings-in-Mex_002dFiles.html#Character-Strings-in-Mex_002dFiles">Character Strings in Mex-Files</a>
<li><a accesskey="4" href="Cell-Arrays-with-Mex_002dFiles.html#Cell-Arrays-with-Mex_002dFiles">Cell Arrays with Mex-Files</a>
<li><a accesskey="5" href="Structures-with-Mex_002dFiles.html#Structures-with-Mex_002dFiles">Structures with Mex-Files</a>
<li><a accesskey="6" href="Sparse-Matrices-with-Mex_002dFiles.html#Sparse-Matrices-with-Mex_002dFiles">Sparse Matrices with Mex-Files</a>
<li><a accesskey="7" href="Calling-Other-Functions-in-Mex_002dFiles.html#Calling-Other-Functions-in-Mex_002dFiles">Calling Other Functions in Mex-Files</a>
<!-- * Application Programming Interface for Mex-Files:: -->
</ul>
</body></html>
|
