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<title>JACK-AUDIO-CONNECTION-KIT: Creating and managing client threads</title>
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<a href="#typedef-members">Typedefs</a> |
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<div class="title">Creating and managing client threads</div> </div>
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<div class="contents">
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:ga1d8128f256f279a2815eae4693752f56"><td class="memItemLeft" align="right" valign="top">typedef int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ClientThreads.html#ga1d8128f256f279a2815eae4693752f56">jack_thread_creator_t</a>) (jack_native_thread_t *, const pthread_attr_t *, void *(*function) (void *), void *arg) <a class="el" href="weakmacros_8h.html#adf1bde0dd996bbf61a44311165014dd1">JACK_OPTIONAL_WEAK_EXPORT</a></td></tr>
<tr class="separator:ga1d8128f256f279a2815eae4693752f56"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga4ee2fcbb266618d66a2cf354d8c54359"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ClientThreads.html#ga4ee2fcbb266618d66a2cf354d8c54359">jack_client_real_time_priority</a> (<a class="el" href="types_8h.html#a96cf103940d2ee71b141d4b9d0c116bf">jack_client_t</a> *) <a class="el" href="weakmacros_8h.html#adf1bde0dd996bbf61a44311165014dd1">JACK_OPTIONAL_WEAK_EXPORT</a></td></tr>
<tr class="separator:ga4ee2fcbb266618d66a2cf354d8c54359"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaa266166c958e1b745ce48ef7ca89890f"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ClientThreads.html#gaa266166c958e1b745ce48ef7ca89890f">jack_client_max_real_time_priority</a> (<a class="el" href="types_8h.html#a96cf103940d2ee71b141d4b9d0c116bf">jack_client_t</a> *) <a class="el" href="weakmacros_8h.html#adf1bde0dd996bbf61a44311165014dd1">JACK_OPTIONAL_WEAK_EXPORT</a></td></tr>
<tr class="separator:gaa266166c958e1b745ce48ef7ca89890f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaec301b7cb1dcd39d7fc88fa9f769dab8"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ClientThreads.html#gaec301b7cb1dcd39d7fc88fa9f769dab8">jack_acquire_real_time_scheduling</a> (jack_native_thread_t thread, int priority) <a class="el" href="weakmacros_8h.html#adf1bde0dd996bbf61a44311165014dd1">JACK_OPTIONAL_WEAK_EXPORT</a></td></tr>
<tr class="separator:gaec301b7cb1dcd39d7fc88fa9f769dab8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga522094adfc39ec4770d8e82bd601e365"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ClientThreads.html#ga522094adfc39ec4770d8e82bd601e365">jack_client_create_thread</a> (<a class="el" href="types_8h.html#a96cf103940d2ee71b141d4b9d0c116bf">jack_client_t</a> *client, jack_native_thread_t *thread, int priority, int realtime, void *(*start_routine)(void *), void *arg) <a class="el" href="weakmacros_8h.html#adf1bde0dd996bbf61a44311165014dd1">JACK_OPTIONAL_WEAK_EXPORT</a></td></tr>
<tr class="separator:ga522094adfc39ec4770d8e82bd601e365"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga0d75ca78f4088f515f1befc108f3f2e7"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ClientThreads.html#ga0d75ca78f4088f515f1befc108f3f2e7">jack_drop_real_time_scheduling</a> (jack_native_thread_t thread) <a class="el" href="weakmacros_8h.html#adf1bde0dd996bbf61a44311165014dd1">JACK_OPTIONAL_WEAK_EXPORT</a></td></tr>
<tr class="separator:ga0d75ca78f4088f515f1befc108f3f2e7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga157ab0ade60e266ffd26ddffdb5545af"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ClientThreads.html#ga157ab0ade60e266ffd26ddffdb5545af">jack_set_thread_creator</a> (<a class="el" href="group__ClientThreads.html#ga1d8128f256f279a2815eae4693752f56">jack_thread_creator_t</a> creator) <a class="el" href="weakmacros_8h.html#adf1bde0dd996bbf61a44311165014dd1">JACK_OPTIONAL_WEAK_EXPORT</a></td></tr>
<tr class="separator:ga157ab0ade60e266ffd26ddffdb5545af"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<h2 class="groupheader">Typedef Documentation</h2>
<a id="ga1d8128f256f279a2815eae4693752f56"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga1d8128f256f279a2815eae4693752f56">◆ </a></span>jack_thread_creator_t</h2>
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<td class="memname">typedef int(* jack_thread_creator_t) (jack_native_thread_t *, const pthread_attr_t *, void *(*function)(void *), void *arg) <a class="el" href="weakmacros_8h.html#adf1bde0dd996bbf61a44311165014dd1">JACK_OPTIONAL_WEAK_EXPORT</a></td>
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</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="gaec301b7cb1dcd39d7fc88fa9f769dab8"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaec301b7cb1dcd39d7fc88fa9f769dab8">◆ </a></span>jack_acquire_real_time_scheduling()</h2>
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<td class="memname">int jack_acquire_real_time_scheduling </td>
<td>(</td>
<td class="paramtype">jack_native_thread_t </td>
<td class="paramname"><em>thread</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>priority</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Attempt to enable realtime scheduling for a thread. On some systems that may require special privileges.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">thread</td><td>POSIX thread ID. </td></tr>
<tr><td class="paramname">priority</td><td>requested thread priority.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0, if successful; EPERM, if the calling process lacks required realtime privileges; otherwise some other error number. </dd></dl>
</div>
</div>
<a id="ga522094adfc39ec4770d8e82bd601e365"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga522094adfc39ec4770d8e82bd601e365">◆ </a></span>jack_client_create_thread()</h2>
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<td class="memname">int jack_client_create_thread </td>
<td>(</td>
<td class="paramtype"><a class="el" href="types_8h.html#a96cf103940d2ee71b141d4b9d0c116bf">jack_client_t</a> * </td>
<td class="paramname"><em>client</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">jack_native_thread_t * </td>
<td class="paramname"><em>thread</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>priority</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>realtime</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">void *(*)(void *) </td>
<td class="paramname"><em>start_routine</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"><em>arg</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Create a thread for JACK or one of its clients. The thread is created executing <em>start_routine</em> with <em>arg</em> as its sole argument.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">client</td><td>the JACK client for whom the thread is being created. May be NULL if the client is being created within the JACK server. </td></tr>
<tr><td class="paramname">thread</td><td>place to return POSIX thread ID. </td></tr>
<tr><td class="paramname">priority</td><td>thread priority, if realtime. </td></tr>
<tr><td class="paramname">realtime</td><td>true for the thread to use realtime scheduling. On some systems that may require special privileges. </td></tr>
<tr><td class="paramname">start_routine</td><td>function the thread calls when it starts. </td></tr>
<tr><td class="paramname">arg</td><td>parameter passed to the <em>start_routine</em>.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0, if successful; otherwise some error number. </dd></dl>
</div>
</div>
<a id="gaa266166c958e1b745ce48ef7ca89890f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaa266166c958e1b745ce48ef7ca89890f">◆ </a></span>jack_client_max_real_time_priority()</h2>
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<td class="memname">int jack_client_max_real_time_priority </td>
<td>(</td>
<td class="paramtype"><a class="el" href="types_8h.html#a96cf103940d2ee71b141d4b9d0c116bf">jack_client_t</a> * </td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<dl class="section return"><dt>Returns</dt><dd>if JACK is running with realtime scheduling, this returns the maximum priority that a JACK client thread should use if the thread is subject to realtime scheduling. Otherwise returns -1. </dd></dl>
</div>
</div>
<a id="ga4ee2fcbb266618d66a2cf354d8c54359"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga4ee2fcbb266618d66a2cf354d8c54359">◆ </a></span>jack_client_real_time_priority()</h2>
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<td class="memname">int jack_client_real_time_priority </td>
<td>(</td>
<td class="paramtype"><a class="el" href="types_8h.html#a96cf103940d2ee71b141d4b9d0c116bf">jack_client_t</a> * </td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
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<dl class="section return"><dt>Returns</dt><dd>if JACK is running with realtime scheduling, this returns the priority that any JACK-created client threads will run at. Otherwise returns -1. </dd></dl>
</div>
</div>
<a id="ga0d75ca78f4088f515f1befc108f3f2e7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga0d75ca78f4088f515f1befc108f3f2e7">◆ </a></span>jack_drop_real_time_scheduling()</h2>
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<td class="memname">int jack_drop_real_time_scheduling </td>
<td>(</td>
<td class="paramtype">jack_native_thread_t </td>
<td class="paramname"><em>thread</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Drop realtime scheduling for a thread.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">thread</td><td>POSIX thread ID.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0, if successful; otherwise an error number. </dd></dl>
</div>
</div>
<a id="ga157ab0ade60e266ffd26ddffdb5545af"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga157ab0ade60e266ffd26ddffdb5545af">◆ </a></span>jack_set_thread_creator()</h2>
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<td class="memname">void jack_set_thread_creator </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__ClientThreads.html#ga1d8128f256f279a2815eae4693752f56">jack_thread_creator_t</a> </td>
<td class="paramname"><em>creator</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>This function can be used in very very specialized cases where it is necessary that client threads created by JACK are created by something other than pthread_create(). After it is used, any threads that JACK needs for the client will will be created by calling the function passed to this function.</p>
<p>No normal application/client should consider calling this. The specific case for which it was created involves running win32/x86 plugins under Wine on Linux, where it is necessary that all threads that might call win32 functions are known to Wine.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">creator</td><td>a function that creates a new thread </td></tr>
</table>
</dd>
</dl>
</div>
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