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<font color='#009900'>// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
</font><font color='#009900'>/*
This is an example illustrating the use of the threaded_object
from the dlib C++ Library.
This is a very simple example. It creates a single thread that
just prints messages to the screen.
*/</font>
<font color='#0000FF'>#include</font> <font color='#5555FF'><</font>iostream<font color='#5555FF'>></font>
<font color='#0000FF'>#include</font> <font color='#5555FF'><</font>dlib<font color='#5555FF'>/</font>threads.h<font color='#5555FF'>></font>
<font color='#0000FF'>#include</font> <font color='#5555FF'><</font>dlib<font color='#5555FF'>/</font>misc_api.h<font color='#5555FF'>></font> <font color='#009900'>// for dlib::sleep
</font>
<font color='#0000FF'>using</font> <font color='#0000FF'>namespace</font> std;
<font color='#0000FF'>using</font> <font color='#0000FF'>namespace</font> dlib;
<font color='#0000FF'>class</font> <b><a name='my_object'></a>my_object</b> : <font color='#0000FF'>public</font> threaded_object
<b>{</b>
<font color='#0000FF'>public</font>:
<b><a name='my_object'></a>my_object</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>
<b>{</b>
<font color='#009900'>// Start our thread going in the thread() function
</font> <font color='#BB00BB'>start</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
<b>}</b>
~<b><a name='my_object'></a>my_object</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>
<b>{</b>
<font color='#009900'>// Tell the thread() function to stop. This will cause should_stop() to
</font> <font color='#009900'>// return true so the thread knows what to do.
</font> <font color='#BB00BB'>stop</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
<font color='#009900'>// Wait for the thread to stop before letting this object destruct itself.
</font> <font color='#009900'>// Also note, you are *required* to wait for the thread to end before
</font> <font color='#009900'>// letting this object destruct itself.
</font> <font color='#BB00BB'>wait</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
<b>}</b>
<font color='#0000FF'>private</font>:
<font color='#0000FF'><u>void</u></font> <b><a name='thread'></a>thread</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>
<b>{</b>
<font color='#009900'>// This is our thread. It will loop until it is told that it should terminate.
</font> <font color='#0000FF'>while</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>should_stop</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>false</font><font face='Lucida Console'>)</font>
<b>{</b>
cout <font color='#5555FF'><</font><font color='#5555FF'><</font> "<font color='#CC0000'>hurray threads!</font>" <font color='#5555FF'><</font><font color='#5555FF'><</font> endl;
dlib::<font color='#BB00BB'>sleep</font><font face='Lucida Console'>(</font><font color='#979000'>500</font><font face='Lucida Console'>)</font>;
<b>}</b>
<b>}</b>
<b>}</b>;
<font color='#0000FF'><u>int</u></font> <b><a name='main'></a>main</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>
<b>{</b>
<font color='#009900'>// Create an instance of our threaded object.
</font> my_object t;
dlib::<font color='#BB00BB'>sleep</font><font face='Lucida Console'>(</font><font color='#979000'>4000</font><font face='Lucida Console'>)</font>;
<font color='#009900'>// Tell the threaded object to pause its thread. This causes the
</font> <font color='#009900'>// thread to block on its next call to should_stop().
</font> t.<font color='#BB00BB'>pause</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
dlib::<font color='#BB00BB'>sleep</font><font face='Lucida Console'>(</font><font color='#979000'>3000</font><font face='Lucida Console'>)</font>;
cout <font color='#5555FF'><</font><font color='#5555FF'><</font> "<font color='#CC0000'>starting thread back up from paused state</font>" <font color='#5555FF'><</font><font color='#5555FF'><</font> endl;
<font color='#009900'>// Tell the thread to unpause itself. This causes should_stop() to unblock
</font> <font color='#009900'>// and to let the thread continue.
</font> t.<font color='#BB00BB'>start</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
dlib::<font color='#BB00BB'>sleep</font><font face='Lucida Console'>(</font><font color='#979000'>4000</font><font face='Lucida Console'>)</font>;
<font color='#009900'>// Let the program end. When t is destructed it will gracefully terminate your
</font> <font color='#009900'>// thread because we have set the destructor up to do so.
</font><b>}</b>
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