File content as of revision 20:34e8d1b03de2:

#include "mbed.h"
#include "Thread.h"
#include "Callback.h"

DigitalOut led1(LED1);

#define mySignal 0x01
class MyTest 
{
    public:
    osThreadId _id;
    Thread _thread;
        
    void myWorker(void const* arge)
    {
        MyTest* t = (MyTest*)arge;
        int i;
        i++;
        osSignalSet(t->_id, mySignal);
    }
     
    MyTest(osThreadId id) :
    _id(id),
    _thread()
    {
       osStatus status =  _thread.start(this, &MyTest::myWorker);  
  //   osStatus status =  _thread.start(mbed::Callback<void()>((MyTest*)this, &MyTest::myWorker));  
    }
        
};

// main() runs in its own thread in the OS
// (note the calls to Thread::wait below for delays)
int main() {
    osThreadId id = Thread::gettid();
    MyTest* test = new MyTest(id);
    while (true) {
        led1 = !led1;
        Thread::wait(500);
    }
}