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