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<a href="#camel-camel-lock.description" class="shortcut">Description</a>
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<div class="refentry">
<a name="camel-camel-lock"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="camel-camel-lock.top_of_page"></a>camel-lock</span></h2>
<p>camel-lock</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="camel-camel-lock.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">#define <a class="link" href="camel-camel-lock.html#CAMEL-LOCK-DOT-RETRY:CAPS" title="CAMEL_LOCK_DOT_RETRY">CAMEL_LOCK_DOT_RETRY</a>
#define <a class="link" href="camel-camel-lock.html#CAMEL-LOCK-DOT-DELAY:CAPS" title="CAMEL_LOCK_DOT_DELAY">CAMEL_LOCK_DOT_DELAY</a>
#define <a class="link" href="camel-camel-lock.html#CAMEL-LOCK-DOT-STALE:CAPS" title="CAMEL_LOCK_DOT_STALE">CAMEL_LOCK_DOT_STALE</a>
#define <a class="link" href="camel-camel-lock.html#CAMEL-LOCK-RETRY:CAPS" title="CAMEL_LOCK_RETRY">CAMEL_LOCK_RETRY</a>
#define <a class="link" href="camel-camel-lock.html#CAMEL-LOCK-DELAY:CAPS" title="CAMEL_LOCK_DELAY">CAMEL_LOCK_DELAY</a>
enum <a class="link" href="camel-camel-lock.html#CamelLockType" title="enum CamelLockType">CamelLockType</a>;
<span class="returnvalue">gint</span> <a class="link" href="camel-camel-lock.html#camel-lock-dot" title="camel_lock_dot ()">camel_lock_dot</a> (<em class="parameter"><code>const <span class="type">gchar</span> *path</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);
<span class="returnvalue">gint</span> <a class="link" href="camel-camel-lock.html#camel-lock-fcntl" title="camel_lock_fcntl ()">camel_lock_fcntl</a> (<em class="parameter"><code><span class="type">gint</span> fd</code></em>,
<em class="parameter"><code><a class="link" href="camel-camel-lock.html#CamelLockType" title="enum CamelLockType"><span class="type">CamelLockType</span></a> type</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);
<span class="returnvalue">gint</span> <a class="link" href="camel-camel-lock.html#camel-lock-flock" title="camel_lock_flock ()">camel_lock_flock</a> (<em class="parameter"><code><span class="type">gint</span> fd</code></em>,
<em class="parameter"><code><a class="link" href="camel-camel-lock.html#CamelLockType" title="enum CamelLockType"><span class="type">CamelLockType</span></a> type</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);
<span class="returnvalue">void</span> <a class="link" href="camel-camel-lock.html#camel-unlock-dot" title="camel_unlock_dot ()">camel_unlock_dot</a> (<em class="parameter"><code>const <span class="type">gchar</span> *path</code></em>);
<span class="returnvalue">void</span> <a class="link" href="camel-camel-lock.html#camel-unlock-fcntl" title="camel_unlock_fcntl ()">camel_unlock_fcntl</a> (<em class="parameter"><code><span class="type">gint</span> fd</code></em>);
<span class="returnvalue">void</span> <a class="link" href="camel-camel-lock.html#camel-unlock-flock" title="camel_unlock_flock ()">camel_unlock_flock</a> (<em class="parameter"><code><span class="type">gint</span> fd</code></em>);
<span class="returnvalue">gint</span> <a class="link" href="camel-camel-lock.html#camel-lock-folder" title="camel_lock_folder ()">camel_lock_folder</a> (<em class="parameter"><code>const <span class="type">gchar</span> *path</code></em>,
<em class="parameter"><code><span class="type">gint</span> fd</code></em>,
<em class="parameter"><code><a class="link" href="camel-camel-lock.html#CamelLockType" title="enum CamelLockType"><span class="type">CamelLockType</span></a> type</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);
<span class="returnvalue">void</span> <a class="link" href="camel-camel-lock.html#camel-unlock-folder" title="camel_unlock_folder ()">camel_unlock_folder</a> (<em class="parameter"><code>const <span class="type">gchar</span> *path</code></em>,
<em class="parameter"><code><span class="type">gint</span> fd</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="camel-camel-lock.description"></a><h2>Description</h2>
<p>
</p>
</div>
<div class="refsect1">
<a name="camel-camel-lock.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="CAMEL-LOCK-DOT-RETRY:CAPS"></a><h3>CAMEL_LOCK_DOT_RETRY</h3>
<pre class="programlisting">#define CAMEL_LOCK_DOT_RETRY (5) /* number of times to retry lock */
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="CAMEL-LOCK-DOT-DELAY:CAPS"></a><h3>CAMEL_LOCK_DOT_DELAY</h3>
<pre class="programlisting">#define CAMEL_LOCK_DOT_DELAY (2) /* delay between locking retries */
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="CAMEL-LOCK-DOT-STALE:CAPS"></a><h3>CAMEL_LOCK_DOT_STALE</h3>
<pre class="programlisting">#define CAMEL_LOCK_DOT_STALE (60) /* seconds before a lock becomes stale */
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="CAMEL-LOCK-RETRY:CAPS"></a><h3>CAMEL_LOCK_RETRY</h3>
<pre class="programlisting">#define CAMEL_LOCK_RETRY (5) /* number of times to retry lock */
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="CAMEL-LOCK-DELAY:CAPS"></a><h3>CAMEL_LOCK_DELAY</h3>
<pre class="programlisting">#define CAMEL_LOCK_DELAY (2) /* delay between locking retries */
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="CamelLockType"></a><h3>enum CamelLockType</h3>
<pre class="programlisting">typedef enum {
CAMEL_LOCK_READ,
CAMEL_LOCK_WRITE
} CamelLockType;
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="camel-lock-dot"></a><h3>camel_lock_dot ()</h3>
<pre class="programlisting"><span class="returnvalue">gint</span> camel_lock_dot (<em class="parameter"><code>const <span class="type">gchar</span> *path</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
Create an exclusive lock using .lock semantics.
All locks are equivalent to write locks (exclusive).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>return location for a <span class="type">GError</span>, or <code class="literal">NULL</code>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>-1 on error, sets <em class="parameter"><code>ex</code></em> appropriately.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="camel-lock-fcntl"></a><h3>camel_lock_fcntl ()</h3>
<pre class="programlisting"><span class="returnvalue">gint</span> camel_lock_fcntl (<em class="parameter"><code><span class="type">gint</span> fd</code></em>,
<em class="parameter"><code><a class="link" href="camel-camel-lock.html#CamelLockType" title="enum CamelLockType"><span class="type">CamelLockType</span></a> type</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
Create a lock using fcntl(2).
</p>
<p>
<em class="parameter"><code>type</code></em> is CAMEL_LOCK_WRITE or CAMEL_LOCK_READ,
to create exclusive or shared read locks
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>return location for a <span class="type">GError</span>, or <code class="literal">NULL</code>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>-1 on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="camel-lock-flock"></a><h3>camel_lock_flock ()</h3>
<pre class="programlisting"><span class="returnvalue">gint</span> camel_lock_flock (<em class="parameter"><code><span class="type">gint</span> fd</code></em>,
<em class="parameter"><code><a class="link" href="camel-camel-lock.html#CamelLockType" title="enum CamelLockType"><span class="type">CamelLockType</span></a> type</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
Create a lock using flock(2).
</p>
<p>
<em class="parameter"><code>type</code></em> is CAMEL_LOCK_WRITE or CAMEL_LOCK_READ,
to create exclusive or shared read locks
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>return location for a <span class="type">GError</span>, or <code class="literal">NULL</code>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>-1 on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="camel-unlock-dot"></a><h3>camel_unlock_dot ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> camel_unlock_dot (<em class="parameter"><code>const <span class="type">gchar</span> *path</code></em>);</pre>
<p>
Attempt to unlock a .lock lock.
</p>
</div>
<hr>
<div class="refsect2">
<a name="camel-unlock-fcntl"></a><h3>camel_unlock_fcntl ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> camel_unlock_fcntl (<em class="parameter"><code><span class="type">gint</span> fd</code></em>);</pre>
<p>
Unlock an fcntl lock.
</p>
</div>
<hr>
<div class="refsect2">
<a name="camel-unlock-flock"></a><h3>camel_unlock_flock ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> camel_unlock_flock (<em class="parameter"><code><span class="type">gint</span> fd</code></em>);</pre>
<p>
Unlock an flock lock.
</p>
</div>
<hr>
<div class="refsect2">
<a name="camel-lock-folder"></a><h3>camel_lock_folder ()</h3>
<pre class="programlisting"><span class="returnvalue">gint</span> camel_lock_folder (<em class="parameter"><code>const <span class="type">gchar</span> *path</code></em>,
<em class="parameter"><code><span class="type">gint</span> fd</code></em>,
<em class="parameter"><code><a class="link" href="camel-camel-lock.html#CamelLockType" title="enum CamelLockType"><span class="type">CamelLockType</span></a> type</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
Attempt to lock a folder, multiple attempts will be made using all
locking strategies available.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>path</code></em> :</span></p></td>
<td>Path to the file to lock (used for .locking only).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>fd</code></em> :</span></p></td>
<td>Open file descriptor of the right type to lock.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>type</code></em> :</span></p></td>
<td>Type of lock, CAMEL_LOCK_READ or CAMEL_LOCK_WRITE.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>return location for a <span class="type">GError</span>, or <code class="literal">NULL</code>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>-1 on error, <em class="parameter"><code>ex</code></em> will describe the locking system that failed.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="camel-unlock-folder"></a><h3>camel_unlock_folder ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> camel_unlock_folder (<em class="parameter"><code>const <span class="type">gchar</span> *path</code></em>,
<em class="parameter"><code><span class="type">gint</span> fd</code></em>);</pre>
<p>
Free a lock on a folder.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>path</code></em> :</span></p></td>
<td>Filename of folder.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>fd</code></em> :</span></p></td>
<td>Open descrptor on which locks were placed.</td>
</tr>
</tbody>
</table></div>
</div>
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