Function SelectThread

src/dolphin/src/os/OSThread.c:263–335

}

static OSThread* SelectThread(BOOL yield)
{
    OSContext* currentContext;
    OSThread* currentThread;
    OSThread* nextThread;
    OSPriority priority;
    OSThreadQueue* queue;

    if (0 < Reschedule)
    {
        return 0;
    }

    currentContext = OSGetCurrentContext();
    currentThread = OSGetCurrentThread();
    if (currentContext != &currentThread->context)
    {
        return 0;
    }

    if (currentThread)
    {
        if (currentThread->state == OS_THREAD_STATE_RUNNING)
        {
            if (!yield)
            {
                priority = __cntlzw(RunQueueBits);
                if (currentThread->priority <= priority)
                {
                    return 0;
                }
            }
            currentThread->state = OS_THREAD_STATE_READY;
            SetRun(currentThread);
        }

        if (!(currentThread->context.state & OS_CONTEXT_STATE_EXC) &&
            OSSaveContext(&currentThread->context))
        {
            return 0;
        }
    }

    if (RunQueueBits == 0)
    {
        SwitchThreadCallback(__OSCurrentThread, NULL);
        __OSCurrentThread = NULL;
        OSSetCurrentContext(&IdleContext);
        do
        {
            OSEnableInterrupts();
            while (RunQueueBits == 0)
                ;
            OSDisableInterrupts();
        } while (RunQueueBits == 0);

        OSClearContext(&IdleContext);
    }