如何使用 edk2 创建多进程？

问题描述

我已经创建了一个这样的定时器，它可以工作，但是当我想创建两个定时器一起工作时，只有一个定时器的回调函数可以工作，请帮忙，谢谢：

EFI_STATUS TimerInit()
{
    EFI_STATUS  Status;
    EFI_HANDLE  TimerOne    = NULL;
    //BOOLEAN       ExitMark    = FALSE;
    static const UINTN SecondsToNanoSeconds = 1000000;

    Status = gBS->CreateEvent(
                                EVT_NOTIFY_SIGNAL | EVT_TIMER,TPL_CALLBACK,TimeoutSelf,NULL,&TimerOne
                                );

    if ( EFI_ERROR( Status ) )
    {
        Print( L"Create Event Error! \r\n" );
        return(1);
    }

    Status = gBS->SetTimer(
        TimerOne,TimerPeriodic,MultU64x32( SecondsToNanoSeconds,1)
        );

    if ( EFI_ERROR( Status ) )
    {
        Print( L"Set Timer Error! \r\n" );
        return(2);
    }

    while (1 )
    {       
        // do something
    }
    
    // cancel timer
    gBS->SetTimer( TimerOne,TimerCancel,0 );
    gBS->CloseEvent( TimerOne );    

    return EFI_SUCCESS;
}

如果我创建两个计时器，我将创建另一个 TimeoutSelf 函数。

解决方法

//this is timer:
EFI_STATUS SystemTimeIntervalInit()
{
    EFI_STATUS  Status;
    EFI_HANDLE  TimerOne    = NULL;
    static const UINTN SecondsToNanoSeconds = 1000000;

    Status = gBS->CreateEvent(
                                EVT_NOTIFY_SIGNAL | EVT_TIMER,TPL_CALLBACK,TimeSlice,NULL,&TimerOne
                                );

    Status = gBS->SetTimer(
        TimerOne,TimerPeriodic,MultU64x32( SecondsToNanoSeconds,1)
        );

    while (1)
    {       
    }
    
    gBS->SetTimer( TimerOne,TimerCancel,0 );
    gBS->CloseEvent( TimerOne );    

    return EFI_SUCCESS;
}

//this is signal event 
VOID EFIAPI TimeSlice(IN EFI_EVENT Event,IN VOID  *Context)
{    
    DEBUG ((EFI_D_INFO,"System time slice Loop ...\n"));
    gBS->SignalEvent (MultiTaskTriggerEvent);

    return;
}

//this is three events:
EFI_STATUS MultiProcessInit ()
{
    UINT8 i;
    EFI_GUID gMultiProcessGuid  = { 0x0579257E,0x1843,0x45FB,{ 0x83,0x9D,0x6B,0x79,0x09,0x38,0x29,0xA9 } };
    
    EFI_EVENT_NOTIFY TaskProcesses[] = {DisplaySystemDateTime,HandleKeyboardEvent,HandleMouseEvent};

    for (i = 0; i < sizeof(TaskProcesses) /sizeof(EFI_EVENT_NOTIFY); i++)
    {
        gBS->CreateEventEx(
                          EVT_NOTIFY_SIGNAL,TPL_NOTIFY,TaskProcesses[i],&gMultiProcessGuid,&MultiTaskTriggerEvent
                          );
    }    

    return EFI_SUCCESS;
}
@MiSimon,I have use one timer and three events to realize it at finally. 
thanks a lot.