/**
* Suspend all running threads.
*
* This is called by PDMR3Suspend() and PDMR3PowerOff() after all the devices
* and drivers have been notified about the suspend / power off.
*
* @return VBox status code.
* @param pVM Pointer to the VM.
*/
int pdmR3ThreadSuspendAll(PVM pVM)
{
PUVM pUVM = pVM->pUVM;
RTCritSectEnter(&pUVM->pdm.s.ListCritSect); /* This may cause deadlocks later... */
for (PPDMTHREAD pThread = pUVM->pdm.s.pThreads; pThread; pThread = pThread->Internal.s.pNext)
switch (pThread->enmState)
{
case PDMTHREADSTATE_RUNNING:
{
int rc = PDMR3ThreadSuspend(pThread);
AssertRCReturn(rc, rc);
break;
}
/* suspend -> power off; voluntary suspend. */
case PDMTHREADSTATE_SUSPENDED:
break;
default:
AssertMsgFailed(("pThread=%p enmState=%d\n", pThread, pThread->enmState));
break;
}
RTCritSectLeave(&pUVM->pdm.s.ListCritSect);
return VINF_SUCCESS;
}
/**
* Callback employed by drvscsiSuspend and drvscsiPowerOff.
*
* @returns true if we've quiesced, false if we're still working.
* @param pDrvIns The driver instance.
*/
static DECLCALLBACK(bool) drvscsiIsAsyncSuspendOrPowerOffDone(PPDMDRVINS pDrvIns)
{
PDRVSCSI pThis = PDMINS_2_DATA(pDrvIns, PDRVSCSI);
if (pThis->pDrvBlockAsync)
{
if (pThis->StatIoDepth > 0)
return false;
else
return true;
}
else
{
if (!drvscsiAsyncIOLoopNoPendingDummy(pThis, 0 /*ms*/))
return false;
ASMAtomicWriteBool(&pThis->fDummySignal, false);
PDMR3ThreadSuspend(pThis->pAsyncIOThread);
return true;
}
}
