| Server IP : 85.214.239.14 / Your IP : 18.227.24.198 Web Server : Apache/2.4.62 (Debian) System : Linux h2886529.stratoserver.net 4.9.0 #1 SMP Tue Jan 9 19:45:01 MSK 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.18 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : OFF | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : OFF Directory : /usr/share/doc/libffi8/html/ |
Upload File : |
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Created by GNU Texinfo 6.8, https://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<!--
This manual is for libffi, a portable foreign function interface
library.
Copyright (C) 2008-2019, 2021, 2022 Anthony Green and Red Hat, Inc.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), 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:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", 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.
-->
<title>Thread Safety (libffi: the portable foreign function interface library)</title>
<meta name="description" content="Thread Safety (libffi: the portable foreign function interface library)">
<meta name="keywords" content="Thread Safety (libffi: the portable foreign function interface library)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta name="viewport" content="width=device-width,initial-scale=1">
<link href="index.html" rel="start" title="Top">
<link href="Index.html" rel="index" title="Index">
<link href="Using-libffi.html" rel="up" title="Using libffi">
<link href="Closure-Example.html" rel="prev" title="Closure Example">
<style type="text/css">
<!--
a.copiable-anchor {visibility: hidden; text-decoration: none; line-height: 0em}
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
span:hover a.copiable-anchor {visibility: visible}
ul.no-bullet {list-style: none}
-->
</style>
</head>
<body lang="en">
<div class="section" id="Thread-Safety">
<div class="header">
<p>
Previous: <a href="Closure-Example.html" accesskey="p" rel="prev">Closure Example</a>, Up: <a href="Using-libffi.html" accesskey="u" rel="up">Using libffi</a> [<a href="Index.html" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<span id="Thread-Safety-1"></span><h3 class="section">2.7 Thread Safety</h3>
<p><code>libffi</code> is not completely thread-safe. However, many parts are,
and if you follow some simple rules, you can use it safely in a
multi-threaded program.
</p>
<ul>
<li> <code>ffi_prep_cif</code> may modify the <code>ffi_type</code> objects passed to
it. It is best to ensure that only a single thread prepares a given
<code>ffi_cif</code> at a time.
</li><li> On some platforms, <code>ffi_prep_cif</code> may modify the size and
alignment of some types, depending on the chosen ABI. On these
platforms, if you switch between ABIs, you must ensure that there is
only one call to <code>ffi_prep_cif</code> at a time.
<p>Currently the only affected platform is PowerPC and the only affected
type is <code>long double</code>.
</p></li></ul>
</div>
</body>
</html>