[ECOS] cyg_thread_delay problem?

[=?big5?b?IldhbmcsIEFsdmluICik/al22XkgVEFPKSI=?= <Wang dot Alvin at inventec dot com>]

 Hi to all,
 
 I use cyg_thread_delay function but it doesn't work. It returns immediately.
 I trace the function and find that when execute Cyg_Scheduler::unlock()
it can't swith to another thread. 

void
Cyg_Thread::delay( cyg_tick_count delay)
{
    CYG_REPORT_FUNCTION();

#ifdef CYGFUN_KERNEL_THREADS_TIMER

    CYG_INSTRUMENT_THREAD(DELAY,this,delay);

    // Prevent preemption
    Cyg_Scheduler::lock();
    
    sleep();

    set_timer( Cyg_Clock::real_time_clock->current_value()+delay, DELAY );

    // Unlock the scheduler and maybe switch threads
    Cyg_Scheduler::unlock();

    // Clear the timeout. It is irrelevant whether the alarm has
    // actually gone off or not.
    clear_timer();

    // and deal with anything else we must do when we return
    switch( wake_reason ) {
    case DESTRUCT:
    case EXIT:            
        exit();
        break;
        
    default:
        break;
    }
#endif
    CYG_REPORT_RETURN();
}


 The cyg_current_time() function works correcttly, so the
 real time clock also works. So could you tell me what is wrong?
 And what should I do?
 
 Thank you very much.
 
 Best Regards,
 Alvin Wang  ¤ý©vÙy
 Software Design Dept. Inventec (TAO) 
 
 

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