void
SetPortValue::execute(ProcessContext& context)
{
Event::execute(context);
assert(_time >= context.start() && _time <= context.end());
if (_port && _port->context() == Context::MESSAGE)
return;
apply(context);
_engine.control_bindings()->port_value_changed(context, _port);
}
unsigned
PreProcessor::process(ProcessContext& context, PostProcessor& dest, size_t limit)
{
Event* const head = _head.load();
if (!head) {
return 0;
}
size_t n_processed = 0;
Event* ev = head;
Event* last = ev;
while (ev && ev->is_prepared() && ev->time() < context.end()) {
if (ev->time() < context.start()) {
// Didn't get around to executing in time, oh well...
ev->set_time(context.start());
}
ev->execute(context);
last = ev;
ev = ev->next();
++n_processed;
if (limit && n_processed >= limit) {
break;
}
}
if (n_processed > 0) {
Event* next = (Event*)last->next();
last->next(NULL);
dest.append(context, head, last);
// Since _head was not NULL, we know it hasn't been changed since
_head = next;
/* If next is NULL, then _tail may now be invalid. However, it would cause
a race to reset _tail here. Instead, append() checks only _head for
emptiness, and resets the tail appropriately. */
}
return n_processed;
}
/** Signal the end of a cycle that has produced messages.
* AUDIO THREAD ONLY.
*/
inline void signal(ProcessContext& context) {
ThreadManager::assert_thread(THREAD_PROCESS);
const Request cycle_end_request(context.end(), NULL);
_requests.write(sizeof(Request), &cycle_end_request);
_sem.post();
}