VOID
SerialCompleteImmediate(
IN WDFDPC Dpc
)
{
PSERIAL_DEVICE_EXTENSION Extension = NULL;
Extension = SerialGetDeviceExtension(WdfDpcGetParentObject(Dpc));
SerialDbgPrintEx(TRACE_LEVEL_INFORMATION, DBG_IOCTLS, ">SerialCompleteImmediate(%p)\n",
Extension);
SerialTryToCompleteCurrent(
Extension,
NULL,
STATUS_SUCCESS,
&Extension->CurrentImmediateRequest,
NULL,
NULL,
Extension->ImmediateTotalTimer,
NULL,
SerialGetNextImmediate,
SERIAL_REF_ISR
);
SerialDbgPrintEx(TRACE_LEVEL_INFORMATION, DBG_IOCTLS, "<SerialCompleteImmediate\n");
}
/*++
Routine Description:
This routine is merely used to truely complete an xoff counter request. It
assumes that the status and the information fields of the request are
already correctly filled in.
Arguments:
Dpc - Not Used.
DeferredContext - Really points to the device extension.
SystemContext1 - Not Used.
SystemContext2 - Not Used.
Return Value:
None.
--*/
_Use_decl_annotations_
VOID
SerialCompleteXoff(
WDFDPC Dpc
)
{
PSERIAL_DEVICE_EXTENSION extension = NULL;
extension = SerialGetDeviceExtension(WdfDpcGetParentObject(Dpc));
TraceEvents(TRACE_LEVEL_INFORMATION, DBG_WRITE, "++SerialCompleteXoff(%p)\r\n",
extension);
SerialTryToCompleteCurrent(extension,
NULL,
STATUS_SUCCESS,
&extension->CurrentXoffRequest,
NULL, NULL,
extension->XoffCountTimer,
NULL, NULL,
SERIAL_REF_ISR);
TraceEvents(TRACE_LEVEL_INFORMATION, DBG_WRITE, "--SerialCompleteXoff\r\n");
}
/*++
Routine Description:
This routine is merely used to complete any write. It
assumes that the status and the information fields of
the request are already correctly filled in.
Arguments:
Dpc - Not Used.
DeferredContext - Really points to the device extension.
SystemContext1 - Not Used.
SystemContext2 - Not Used.
Return Value:
None.
--*/
_Use_decl_annotations_
VOID
SerialCompleteWrite(
WDFDPC Dpc
)
{
PSERIAL_DEVICE_EXTENSION Extension = NULL;
Extension = SerialGetDeviceExtension(WdfDpcGetParentObject(Dpc));
TraceEvents(TRACE_LEVEL_INFORMATION, DBG_WRITE, "++SerialCompleteWrite(%p) DPC\r\n",
Extension);
SerialTryToCompleteCurrent(Extension,
NULL,
STATUS_SUCCESS,
&Extension->CurrentWriteRequest,
Extension->WriteQueue,
NULL,
Extension->WriteRequestTotalTimer,
SerialStartWrite,
SerialGetNextWrite,
SERIAL_REF_ISR);
TraceEvents(TRACE_LEVEL_INFORMATION, DBG_WRITE, "--SerialCompleteWrite DPC\r\n");
}
static VOID
XenVbd_EvtDpcEvent(WDFDPC dpc) {
WDFDEVICE device = WdfDpcGetParentObject(dpc);
PXENVBD_FILTER_DATA xvfd = GetXvfd(device);
for (;;) {
if (InterlockedCompareExchange(&xvfd->event_state, 1, 0) == 0) {
/* was no event outstanding, now there is */
XenVbd_SendEvent(device);
break;
}
if (InterlockedCompareExchange(&xvfd->event_state, 2, 1) != 0) {
//FUNCTION_MSG("event already in progress\n");
/* event was outstanding. either we set the need new event flag or it was already set */
break;
}
/* event_state changed while we were looking at it, go around again */
}
}
