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<h2><span class="refentrytitle">Writing GLib Applications</span></h2>
<p>Writing GLib Applications — 
General considerations when programming with GLib
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<a name="id-1.2.5.3"></a><h2>Writing GLib Applications</h2>
<div class="refsect2">
<a name="id-1.2.5.3.2"></a><h3>Threads</h3>
<p>
The general policy of GLib is that all functions are invisibly threadsafe
with the exception of data structure manipulation functions, where, if
you have two threads manipulating the <span class="emphasis"><em>same</em></span> data
structure, they must use a lock to synchronize their operation.
</p>
<p>
GLib creates a worker thread for its own purposes so GLib applications
will always have at least 2 threads.
</p>
<p>
See the sections on <a class="link" href="glib-Threads.html" title="Threads">threads</a> and
<a class="link" href="glib-Thread-Pools.html" title="Thread Pools">threadpools</a> for GLib APIs that
support multithreaded applications.
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<div class="refsect2">
<a name="id-1.2.5.3.3"></a><h3>Security</h3>
<p>
When writing code that runs with elevated privileges, it is important
to follow some basic rules of secure programming. David Wheeler has an
excellent book on this topic,
<a class="ulink" href="http://www.dwheeler.com/secure-programs/Secure-Programs-HOWTO/index.html" target="_top">Secure Programming for Linux and Unix HOWTO</a>.
</p>
<p>
When it comes to GLib and its associated libraries, GLib and
GObject are generally fine to use in code that runs with elevated
privileges; they don't load modules (executable code in shared objects)
or run other programs 'behind your back'. GIO has to be used
carefully in privileged programs, see the <a class="ulink" href="http://developer.gnome.org/gio/stable/ch02.html" target="_top">GIO documentation</a> for details.
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