Function BOOST_COMPUTE_CL_CALLBACK callback

test/test_event.cpp:36–42

static bool callback_invoked = false;

static void BOOST_COMPUTE_CL_CALLBACK
callback(cl_event event, cl_int status, void *user_data)
{
    std::lock_guard<std::mutex> lock(callback_mutex);
    callback_invoked = true;
    callback_condition_variable.notify_one();
}

BOOST_AUTO_TEST_CASE(event_callback)
{