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// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
/*
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.
*/
#include <iostream>
#include <dlib/threads.h>
#include <dlib/misc_api.h> // for dlib::sleep
using namespace std;
using namespace dlib;
class my_object : public threaded_object
{
public:
my_object()
{
// Start our thread going in the thread() function
start();
}
~my_object()
{
// Tell the thread() function to stop. This will cause should_stop() to
// return true so the thread knows what to do.
stop();
// Wait for the thread to stop before letting this object destruct itself.
// Also note, you are *required* to wait for the thread to end before
// letting this object destruct itself.
wait();
}
private:
void thread()
{
// This is our thread. It will loop until it is told that it should terminate.
while (should_stop() == false)
{
cout << "hurray threads!" << endl;
dlib::sleep(500);
}
}
};
int main()
{
// Create an instance of our threaded object.
my_object t;
dlib::sleep(4000);
// Tell the threaded object to pause its thread. This causes the
// thread to block on its next call to should_stop().
t.pause();
dlib::sleep(3000);
cout << "starting thread back up from paused state" << endl;
// Tell the thread to unpause itself. This causes should_stop() to unblock
// and to let the thread continue.
t.start();
dlib::sleep(4000);
// Let the program end. When t is destructed it will gracefully terminate your
// thread because we have set the destructor up to do so.
}
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