/// Stops the current thread
void StopThread(Handle handle, const char* reason) {
Thread* thread = g_object_pool.GetFast<Thread>(handle);
_assert_msg_(KERNEL, (thread != nullptr), "called, but thread is nullptr!");
ChangeReadyState(thread, false);
thread->status = THREADSTATUS_DORMANT;
for (size_t i = 0; i < thread->waiting_threads.size(); ++i) {
const Handle waiting_thread = thread->waiting_threads[i];
if (VerifyWait(waiting_thread, WAITTYPE_THREADEND, handle)) {
ResumeThreadFromWait(waiting_thread);
}
}
thread->waiting_threads.clear();
// Stopped threads are never waiting.
thread->wait_type = WAITTYPE_NONE;
thread->wait_handle = 0;
}
/// Reschedules to the next available thread (call after current thread is suspended)
void Reschedule() {
Thread* prev = GetCurrentThread();
Thread* next = NextThread();
HLE::g_reschedule = false;
if (next > 0) {
INFO_LOG(KERNEL, "context switch 0x%08X -> 0x%08X", prev->GetHandle(), next->GetHandle());
SwitchContext(next);
// Hack - There is no mechanism yet to waken the primary thread if it has been put to sleep
// by a simulated VBLANK thread switch. So, we'll just immediately set it to "ready" again.
// This results in the current thread yielding on a VBLANK once, and then it will be
// immediately placed back in the queue for execution.
if (prev->wait_type == WAITTYPE_VBLANK) {
ResumeThreadFromWait(prev->GetHandle());
}
}
}
/**
* Signals an event
* @param handle Handle to event to signal
* @return Result of operation, 0 on success, otherwise error code
*/
Result SignalEvent(const Handle handle) {
Event* evt = g_object_pool.GetFast<Event>(handle);
_assert_msg_(KERNEL, (evt != nullptr), "called, but event is nullptr!");
// Resume threads waiting for event to signal
bool event_caught = false;
for (size_t i = 0; i < evt->waiting_threads.size(); ++i) {
ResumeThreadFromWait( evt->waiting_threads[i]);
// If any thread is signalled awake by this event, assume the event was "caught" and reset
// the event. This will result in the next thread waiting on the event to block. Otherwise,
// the event will not be reset, and the next thread to call WaitSynchronization on it will
// not block. Not sure if this is correct behavior, but it seems to work.
event_caught = true;
}
evt->waiting_threads.clear();
if (!evt->permanent_locked) {
evt->locked = event_caught;
}
return 0;
}
