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<h1 class="settitle" align="center">CFFI-SYS Interface Specification</h1>






<a name="SEC_Contents"></a>
<h2 class="contents-heading">Table of Contents</h2>

<div class="contents">

<ul class="no-bullet">
  <li><a name="toc-Introduction-1" href="#Introduction">1 Introduction</a></li>
  <li><a name="toc-Built_002dIn-Foreign-Types-1" href="#Built_002dIn-Foreign-Types">2 Built-In Foreign Types</a></li>
  <li><a name="toc-Operations-on-Built_002din-Foreign-Types" href="#Operations-on-Foreign-Types">3 Operations on Built-in Foreign Types</a></li>
  <li><a name="toc-Basic-Pointer-Operations-1" href="#Basic-Pointer-Operations">4 Basic Pointer Operations</a></li>
  <li><a name="toc-Foreign-Memory-Allocation-1" href="#Foreign-Memory-Allocation">5 Foreign Memory Allocation</a></li>
  <li><a name="toc-Memory-Access-1" href="#Memory-Access">6 Memory Access</a></li>
  <li><a name="toc-Foreign-Function-Calling-1" href="#Foreign-Function-Calling">7 Foreign Function Calling</a></li>
  <li><a name="toc-Loading-Foreign-Libraries-1" href="#Loading-Foreign-Libraries">8 Loading Foreign Libraries</a></li>
  <li><a name="toc-Foreign-Globals-1" href="#Foreign-Globals">9 Foreign Globals</a></li>
  <li><a name="toc-Symbol-Index-1" href="#Symbol-Index">Symbol Index</a></li>
</ul>
</div>


<a name="Top"></a>
<div class="header">
<p>
Next: <a href="#Introduction" accesskey="n" rel="next">Introduction</a>, Up: <a href="dir.html#Top" accesskey="u" rel="up">(dir)</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="cffi_002dsys"></a>
<h1 class="top">cffi-sys</h1>
<p>Copyright &copy; 2005-2006, James Bielman  &lt;jamesjb at jamesjb.com&gt;
</p>
<blockquote>
<p>Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the &ldquo;Software&rdquo;), to deal in the Software without
restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
</p>
<p>The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
</p>
<p><small>THE SOFTWARE IS PROVIDED &ldquo;AS IS&rdquo;, WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.</small>
</p></blockquote>


<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="#Introduction" accesskey="1">Introduction</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="#Built_002dIn-Foreign-Types" accesskey="2">Built-In Foreign Types</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="#Operations-on-Foreign-Types" accesskey="3">Operations on Foreign Types</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="#Basic-Pointer-Operations" accesskey="4">Basic Pointer Operations</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="#Foreign-Memory-Allocation" accesskey="5">Foreign Memory Allocation</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="#Memory-Access" accesskey="6">Memory Access</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="#Foreign-Function-Calling" accesskey="7">Foreign Function Calling</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="#Loading-Foreign-Libraries" accesskey="8">Loading Foreign Libraries</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="#Foreign-Globals" accesskey="9">Foreign Globals</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="#Symbol-Index">Symbol Index</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>

<hr>
<a name="Introduction"></a>
<div class="header">
<p>
Next: <a href="#Built_002dIn-Foreign-Types" accesskey="n" rel="next">Built-In Foreign Types</a>, Previous: <a href="#Top" accesskey="p" rel="prev">Top</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Introduction-1"></a>
<h2 class="chapter">1 Introduction</h2>

<p><acronym>CFFI</acronym>, the Common Foreign Function Interface, purports to be
a portable foreign function interface for Common Lisp.
</p>
<p>This specification defines a set of low-level primitives that must be
defined for each Lisp implementation supported by <acronym>CFFI</acronym>.
These operators are defined in the <code>CFFI-SYS</code> package.
</p>
<p>The <code>CFFI</code> package uses the <code>CFFI-SYS</code> interface
to implement an extensible foreign type system with support for
typedefs, structures, and unions, a declarative interface for
defining foreign function calls, and automatic conversion of
foreign function arguments to/from Lisp types.
</p>
<p>Please note the following conventions that apply to everything in
<code>CFFI-SYS</code>:
</p>
<ul>
<li> Functions in <code>CFFI-SYS</code> that are low-level versions of functions
exported from the <code>CFFI</code> package begin with a leading
percent-sign (eg. <code>%mem-ref</code>).

</li><li> Where &ldquo;foreign type&rdquo; is mentioned as the kind of an argument, the
meaning is restricted to that subset of all foreign types defined in
<a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a>.  Support for higher-level types is
always defined in terms of those lower-level types in <code>CFFI</code>
proper.
</li></ul>


<hr>
<a name="Built_002dIn-Foreign-Types"></a>
<div class="header">
<p>
Next: <a href="#Operations-on-Foreign-Types" accesskey="n" rel="next">Operations on Foreign Types</a>, Previous: <a href="#Introduction" accesskey="p" rel="prev">Introduction</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Built_002dIn-Foreign-Types-1"></a>
<h2 class="chapter">2 Built-In Foreign Types</h2>

<dl>
<dt><a name="index-_003achar"></a>Foreign Type: <strong>:char</strong></dt>
<dt><a name="index-_003aunsigned_002dchar"></a>Foreign Type: <strong>:unsigned-char</strong></dt>
<dt><a name="index-_003ashort"></a>Foreign Type: <strong>:short</strong></dt>
<dt><a name="index-_003aunsigned_002dshort"></a>Foreign Type: <strong>:unsigned-short</strong></dt>
<dt><a name="index-_003aint"></a>Foreign Type: <strong>:int</strong></dt>
<dt><a name="index-_003aunsigned_002dint"></a>Foreign Type: <strong>:unsigned-int</strong></dt>
<dt><a name="index-_003along"></a>Foreign Type: <strong>:long</strong></dt>
<dt><a name="index-_003aunsigned_002dlong"></a>Foreign Type: <strong>:unsigned-long</strong></dt>
<dt><a name="index-_003along_002dlong"></a>Foreign Type: <strong>:long-long</strong></dt>
<dt><a name="index-_003aunsigned_002dlong_002dlong"></a>Foreign Type: <strong>:unsigned-long-long</strong></dt>
<dd><p>These types correspond to the native C integer types according to the
ABI of the system the Lisp implementation is compiled against.
</p></dd></dl>

<dl>
<dt><a name="index-_003aint8"></a>Foreign Type: <strong>:int8</strong></dt>
<dt><a name="index-_003auint8"></a>Foreign Type: <strong>:uint8</strong></dt>
<dt><a name="index-_003aint16"></a>Foreign Type: <strong>:int16</strong></dt>
<dt><a name="index-_003auint16"></a>Foreign Type: <strong>:uint16</strong></dt>
<dt><a name="index-_003aint32"></a>Foreign Type: <strong>:int32</strong></dt>
<dt><a name="index-_003auint32"></a>Foreign Type: <strong>:uint32</strong></dt>
<dt><a name="index-_003aint64"></a>Foreign Type: <strong>:int64</strong></dt>
<dt><a name="index-_003auint64"></a>Foreign Type: <strong>:uint64</strong></dt>
<dd><p>Foreign integer types of specific sizes, corresponding to the C types
defined in <code>stdint.h</code>.
</p></dd></dl>

<dl>
<dt><a name="index-_003asize"></a>Foreign Type: <strong>:size</strong></dt>
<dt><a name="index-_003assize"></a>Foreign Type: <strong>:ssize</strong></dt>
<dt><a name="index-_003aptrdiff"></a>Foreign Type: <strong>:ptrdiff</strong></dt>
<dt><a name="index-_003atime"></a>Foreign Type: <strong>:time</strong></dt>
<dd><p>Foreign integer types corresponding to the standard C types (without
the <code>_t</code> suffix).
</p></dd></dl>

<p><em>Implementor&rsquo;s note: I&rsquo;m sure there are more of these that could be useful, let&rsquo;s
add any types that can&rsquo;t be defined portably to this list as
necessary.</em>
</p>
<dl>
<dt><a name="index-_003afloat"></a>Foreign Type: <strong>:float</strong></dt>
<dt><a name="index-_003adouble"></a>Foreign Type: <strong>:double</strong></dt>
<dd><p>The <code>:float</code> type represents a C <code>float</code> and a Lisp
<code>single-float</code>. <code>:double</code> represents a C <code>double</code> and a
Lisp <code>double-float</code>.
</p></dd></dl>

<dl>
<dt><a name="index-_003apointer"></a>Foreign Type: <strong>:pointer</strong></dt>
<dd><p>A foreign pointer to an object of any type, corresponding to
<code>void *</code>.
</p></dd></dl>

<dl>
<dt><a name="index-_003avoid"></a>Foreign Type: <strong>:void</strong></dt>
<dd><p>No type at all. Only valid as the return type of a function.
</p></dd></dl>


<hr>
<a name="Operations-on-Foreign-Types"></a>
<div class="header">
<p>
Next: <a href="#Basic-Pointer-Operations" accesskey="n" rel="next">Basic Pointer Operations</a>, Previous: <a href="#Built_002dIn-Foreign-Types" accesskey="p" rel="prev">Built-In Foreign Types</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Operations-on-Built_002din-Foreign-Types"></a>
<h2 class="chapter">3 Operations on Built-in Foreign Types</h2>

<dl>
<dt><a name="index-_0025foreign_002dtype_002dsize"></a>Function: <strong>%foreign-type-size</strong> <em>type &rArr; size</em></dt>
<dd><p>Return the <var>size</var>, in bytes, of objects having foreign type
<var>type</var>. An error is signalled if <var>type</var> is not a known
built-in foreign type.
</p></dd></dl>

<dl>
<dt><a name="index-_0025foreign_002dtype_002dalignment"></a>Function: <strong>%foreign-type-alignment</strong> <em>type &rArr; alignment</em></dt>
<dd><p>Return the default alignment in bytes for structure members of foreign
type <var>type</var>. An error is signalled if <var>type</var> is not a known
built-in foreign type.
</p>
<p><em>Implementor&rsquo;s note: Maybe this should take an optional keyword argument specifying an
alternate alignment system, eg. :mac68k for 68000-compatible alignment
on Darwin.</em>
</p></dd></dl>


<hr>
<a name="Basic-Pointer-Operations"></a>
<div class="header">
<p>
Next: <a href="#Foreign-Memory-Allocation" accesskey="n" rel="next">Foreign Memory Allocation</a>, Previous: <a href="#Operations-on-Foreign-Types" accesskey="p" rel="prev">Operations on Foreign Types</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Basic-Pointer-Operations-1"></a>
<h2 class="chapter">4 Basic Pointer Operations</h2>

<dl>
<dt><a name="index-pointerp"></a>Function: <strong>pointerp</strong> <em>ptr &rArr; boolean</em></dt>
<dd><p>Return true if <var>ptr</var> is a foreign pointer.
</p></dd></dl>

<dl>
<dt><a name="index-null_002dpointer"></a>Function: <strong>null-pointer</strong> <em>&rArr; pointer</em></dt>
<dd><p>Return a null foreign pointer.
</p></dd></dl>

<dl>
<dt><a name="index-null_002dpointer_002dp"></a>Function: <strong>null-pointer-p</strong> <em>ptr &rArr; boolean</em></dt>
<dd><p>Return true if <var>ptr</var> is a null foreign pointer.
</p></dd></dl>

<dl>
<dt><a name="index-make_002dpointer"></a>Function: <strong>make-pointer</strong> <em>address &rArr; pointer</em></dt>
<dd><p>Return a pointer corresponding to the numeric integer <var>address</var>.
</p></dd></dl>

<dl>
<dt><a name="index-inc_002dpointer"></a>Function: <strong>inc-pointer</strong> <em>ptr offset &rArr; pointer</em></dt>
<dd><p>Return the result of numerically incrementing <var>ptr</var> by <var>offset</var>.
</p></dd></dl>


<hr>
<a name="Foreign-Memory-Allocation"></a>
<div class="header">
<p>
Next: <a href="#Memory-Access" accesskey="n" rel="next">Memory Access</a>, Previous: <a href="#Basic-Pointer-Operations" accesskey="p" rel="prev">Basic Pointer Operations</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Foreign-Memory-Allocation-1"></a>
<h2 class="chapter">5 Foreign Memory Allocation</h2>

<dl>
<dt><a name="index-foreign_002dalloc"></a>Function: <strong>foreign-alloc</strong> <em>size &rArr; pointer</em></dt>
<dd><p>Allocate <var>size</var> bytes of foreign-addressable memory and return
a <var>pointer</var> to the allocated block. An implementation-specific
error is signalled if the memory cannot be allocated.
</p></dd></dl>

<dl>
<dt><a name="index-foreign_002dfree"></a>Function: <strong>foreign-free</strong> <em>ptr &rArr; unspecified</em></dt>
<dd><p>Free a pointer <var>ptr</var> allocated by <code>foreign-alloc</code>. The
results are undefined if <var>ptr</var> is used after being freed.
</p></dd></dl>

<dl>
<dt><a name="index-with_002dforeign_002dpointer"></a>Macro: <strong>with-foreign-pointer</strong> <em>(var size &amp;optional size-var) &amp;body body</em></dt>
<dd><p>Bind <var>var</var> to a pointer to <var>size</var> bytes of
foreign-accessible memory during <var>body</var>.  Both <var>ptr</var> and the
memory block it points to have dynamic extent and may be stack
allocated if supported by the implementation. If <var>size-var</var> is
supplied, it will be bound to <var>size</var> during <var>body</var>.
</p></dd></dl>


<hr>
<a name="Memory-Access"></a>
<div class="header">
<p>
Next: <a href="#Foreign-Function-Calling" accesskey="n" rel="next">Foreign Function Calling</a>, Previous: <a href="#Foreign-Memory-Allocation" accesskey="p" rel="prev">Foreign Memory Allocation</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Memory-Access-1"></a>
<h2 class="chapter">6 Memory Access</h2>

<dl>
<dt><a name="index-_0025mem_002dref"></a>Accessor: <strong>%mem-ref</strong> <em>ptr type &amp;optional offset</em></dt>
<dd><p>Dereference a pointer <var>offset</var> bytes from <var>ptr</var> to an object
for reading (or writing when used with <code>setf</code>) of built-in type
<var>type</var>.
</p></dd></dl>

<a name="Example"></a>
<h3 class="heading">Example</h3>

<div class="lisp">
<pre class="lisp">  <span class="comment">;; An impractical example, since time returns the time as well,
  </span><span class="comment">;; but it demonstrates %MEM-REF. Better (simple) examples wanted!
  </span><span class="paren1">(<span class="lisp-bg"><i><span class="symbol">with-foreign-pointer</span></i> <span class="paren2">(<span class="lisp-bg">p <span class="paren3">(<span class="lisp-bg">foreign-type-size <span class="keyword">:time</span></span>)</span></span>)</span>
    <span class="paren2">(<span class="lisp-bg">foreign-funcall <span class="string">&quot;time&quot;</span> <span class="keyword">:pointer</span> p <span class="keyword">:time</span></span>)</span>
    <span class="paren2">(<span class="lisp-bg">%mem-ref p <span class="keyword">:time</span></span>)</span></span>)</span>
</pre></div>


<hr>
<a name="Foreign-Function-Calling"></a>
<div class="header">
<p>
Next: <a href="#Loading-Foreign-Libraries" accesskey="n" rel="next">Loading Foreign Libraries</a>, Previous: <a href="#Memory-Access" accesskey="p" rel="prev">Memory Access</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Foreign-Function-Calling-1"></a>
<h2 class="chapter">7 Foreign Function Calling</h2>

<dl>
<dt><a name="index-_0025foreign_002dfuncall"></a>Macro: <strong>%foreign-funcall</strong> <em>name {arg-type arg}* &amp;optional result-type &rArr; object</em></dt>
<dt><a name="index-_0025foreign_002dfuncall_002dpointer"></a>Macro: <strong>%foreign-funcall-pointer</strong> <em>ptr {arg-type arg}* &amp;optional result-type &rArr; object</em></dt>
<dd><p>Invoke a foreign function called <var>name</var> in the foreign source code.
</p>
<p>Each <var>arg-type</var> is a foreign type specifier, followed by
<var>arg</var>, Lisp data to be converted to foreign data of type
<var>arg-type</var>.  <var>result-type</var> is the foreign type of the
function&rsquo;s return value, and is assumed to be <code>:void</code> if not
supplied.
</p>
<p><code>%foreign-funcall-pointer</code> takes a pointer <var>ptr</var> to the
function, as returned by <code>foreign-symbol-pointer</code>, rather than a
string <var>name</var>.
</p></dd></dl>

<a name="Examples"></a>
<h3 class="heading">Examples</h3>

<div class="lisp">
<pre class="lisp">  <span class="comment">;; Calling a standard C library function:
  </span><span class="paren1">(<span class="lisp-bg">%foreign-funcall <span class="string">&quot;sqrtf&quot;</span> <span class="keyword">:float</span> 16.0 <span class="keyword">:float</span></span>)</span> &rArr; 4.0
</pre></div>

<div class="lisp">
<pre class="lisp">  <span class="comment">;; Dynamic allocation of a buffer and passing to a function:
  </span><span class="paren1">(<span class="lisp-bg"><i><span class="symbol">with-foreign-ptr</span></i> <span class="paren2">(<span class="lisp-bg">buf 255 buf-size</span>)</span>
    <span class="paren2">(<span class="lisp-bg">%foreign-funcall <span class="string">&quot;gethostname&quot;</span> <span class="keyword">:pointer</span> buf <span class="keyword">:size</span> buf-size <span class="keyword">:int</span></span>)</span>
    <span class="comment">;; Convert buf to a Lisp string using MAKE-STRING and %MEM-REF or
  </span>  <span class="comment">;; a portable CFFI function such as CFFI:FOREIGN-STRING-TO-LISP.
  </span>  </span>)</span>
</pre></div>


<hr>
<a name="Loading-Foreign-Libraries"></a>
<div class="header">
<p>
Next: <a href="#Foreign-Globals" accesskey="n" rel="next">Foreign Globals</a>, Previous: <a href="#Foreign-Function-Calling" accesskey="p" rel="prev">Foreign Function Calling</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Loading-Foreign-Libraries-1"></a>
<h2 class="chapter">8 Loading Foreign Libraries</h2>

<dl>
<dt><a name="index-_0025load_002dforeign_002dlibrary"></a>Function: <strong>%load-foreign-library</strong> <em>name &rArr; unspecified</em></dt>
<dd><p>Load the foreign shared library <var>name</var>.
</p>
<p><em>Implementor&rsquo;s note: There is a lot of behavior to decide here.  Currently I lean
toward not requiring NAME to be a full path to the library so
we can search the system library directories (maybe even get
LD_LIBRARY_PATH from the environment) as necessary.</em>
</p></dd></dl>


<hr>
<a name="Foreign-Globals"></a>
<div class="header">
<p>
Next: <a href="#Symbol-Index" accesskey="n" rel="next">Symbol Index</a>, Previous: <a href="#Loading-Foreign-Libraries" accesskey="p" rel="prev">Loading Foreign Libraries</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Foreign-Globals-1"></a>
<h2 class="chapter">9 Foreign Globals</h2>

<dl>
<dt><a name="index-foreign_002dsymbol_002dpointer"></a>Function: <strong>foreign-symbol-pointer</strong> <em>name &rArr; pointer</em></dt>
<dd><p>Return a pointer to a foreign symbol <var>name</var>.
</p></dd></dl>

<hr>
<a name="Symbol-Index"></a>
<div class="header">
<p>
Previous: <a href="#Foreign-Globals" accesskey="p" rel="prev">Foreign Globals</a>, Up: <a href="#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="#Symbol-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Symbol-Index-1"></a>
<h2 class="unnumbered">Symbol Index</h2>
<table><tr><th valign="top">Jump to: &nbsp; </th><td><a class="summary-letter" href="#Symbol-Index_fn_symbol-1"><b>%</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_symbol-2"><b>:</b></a>
 &nbsp; 
<br>
<a class="summary-letter" href="#Symbol-Index_fn_letter-F"><b>F</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-I"><b>I</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-M"><b>M</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-N"><b>N</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-P"><b>P</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-W"><b>W</b></a>
 &nbsp; 
</td></tr></table>
<table class="index-fn" border="0">
<tr><td></td><th align="left">Index Entry</th><td>&nbsp;</td><th align="left"> Section</th></tr>
<tr><td colspan="4"> <hr></td></tr>
<tr><th><a name="Symbol-Index_fn_symbol-1">%</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#index-_0025foreign_002dfuncall"><code>%foreign-funcall</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Foreign-Function-Calling">Foreign Function Calling</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_0025foreign_002dfuncall_002dpointer"><code>%foreign-funcall-pointer</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Foreign-Function-Calling">Foreign Function Calling</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_0025foreign_002dtype_002dalignment"><code>%foreign-type-alignment</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Operations-on-Foreign-Types">Operations on Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_0025foreign_002dtype_002dsize"><code>%foreign-type-size</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Operations-on-Foreign-Types">Operations on Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_0025load_002dforeign_002dlibrary"><code>%load-foreign-library</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Loading-Foreign-Libraries">Loading Foreign Libraries</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_0025mem_002dref"><code>%mem-ref</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Memory-Access">Memory Access</a></td></tr>
<tr><td colspan="4"> <hr></td></tr>
<tr><th><a name="Symbol-Index_fn_symbol-2">:</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003achar">:char</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003adouble">:double</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003afloat">:float</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aint">:int</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aint16">:int16</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aint32">:int32</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aint64">:int64</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aint8">:int8</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003along">:long</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003along_002dlong">:long-long</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003apointer">:pointer</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aptrdiff">:ptrdiff</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003ashort">:short</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003asize">:size</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003assize">:ssize</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003atime">:time</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003auint16">:uint16</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003auint32">:uint32</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003auint64">:uint64</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003auint8">:uint8</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aunsigned_002dchar">:unsigned-char</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aunsigned_002dint">:unsigned-int</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aunsigned_002dlong">:unsigned-long</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aunsigned_002dlong_002dlong">:unsigned-long-long</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003aunsigned_002dshort">:unsigned-short</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-_003avoid">:void</a>:</td><td>&nbsp;</td><td valign="top"><a href="#Built_002dIn-Foreign-Types">Built-In Foreign Types</a></td></tr>
<tr><td colspan="4"> <hr></td></tr>
<tr><th><a name="Symbol-Index_fn_letter-F">F</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#index-foreign_002dalloc"><code>foreign-alloc</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Foreign-Memory-Allocation">Foreign Memory Allocation</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-foreign_002dfree"><code>foreign-free</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Foreign-Memory-Allocation">Foreign Memory Allocation</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-foreign_002dsymbol_002dpointer"><code>foreign-symbol-pointer</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Foreign-Globals">Foreign Globals</a></td></tr>
<tr><td colspan="4"> <hr></td></tr>
<tr><th><a name="Symbol-Index_fn_letter-I">I</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#index-inc_002dpointer"><code>inc-pointer</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Basic-Pointer-Operations">Basic Pointer Operations</a></td></tr>
<tr><td colspan="4"> <hr></td></tr>
<tr><th><a name="Symbol-Index_fn_letter-M">M</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#index-make_002dpointer"><code>make-pointer</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Basic-Pointer-Operations">Basic Pointer Operations</a></td></tr>
<tr><td colspan="4"> <hr></td></tr>
<tr><th><a name="Symbol-Index_fn_letter-N">N</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#index-null_002dpointer"><code>null-pointer</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Basic-Pointer-Operations">Basic Pointer Operations</a></td></tr>
<tr><td></td><td valign="top"><a href="#index-null_002dpointer_002dp"><code>null-pointer-p</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Basic-Pointer-Operations">Basic Pointer Operations</a></td></tr>
<tr><td colspan="4"> <hr></td></tr>
<tr><th><a name="Symbol-Index_fn_letter-P">P</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#index-pointerp"><code>pointerp</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Basic-Pointer-Operations">Basic Pointer Operations</a></td></tr>
<tr><td colspan="4"> <hr></td></tr>
<tr><th><a name="Symbol-Index_fn_letter-W">W</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#index-with_002dforeign_002dpointer"><code>with-foreign-pointer</code></a>:</td><td>&nbsp;</td><td valign="top"><a href="#Foreign-Memory-Allocation">Foreign Memory Allocation</a></td></tr>
<tr><td colspan="4"> <hr></td></tr>
</table>
<table><tr><th valign="top">Jump to: &nbsp; </th><td><a class="summary-letter" href="#Symbol-Index_fn_symbol-1"><b>%</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_symbol-2"><b>:</b></a>
 &nbsp; 
<br>
<a class="summary-letter" href="#Symbol-Index_fn_letter-F"><b>F</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-I"><b>I</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-M"><b>M</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-N"><b>N</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-P"><b>P</b></a>
 &nbsp; 
<a class="summary-letter" href="#Symbol-Index_fn_letter-W"><b>W</b></a>
 &nbsp; 
</td></tr></table>

<hr>



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cl-cffi 1:0.19.0-1 / usr / share / doc / cl-cffi / cffi-sys-spec.html
