rem: retcode = pthread_create(th_ecasound_cqueue, th_attr, start_normal, (void*)param);
add: retcode = pthread_create(th_ecasound_cqueue, th_attr, start_normal, (void*)session);
context: void start_normal_thread(ECA_SESSION* param, int retcode, pthread_t*			 th_ecasound_cqueue, pthread_attr_t* th_attr) {  retcode = pthread_create(th_ecasound_cqueue, th_attr, start_normal, (void*)param);  if (retcode != 0)    throw(new ECA_ERROR("ECA-CONTROLLER", "Unable to create a new thread (start_normal)."));}