PPARALLEL_IEEE_REV_TO_FWD - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// parallel.h
PPARALLEL_IEEE_REV_TO_FWD PparallelIeeeRevToFwd;
NTSTATUS PparallelIeeeRevToFwd(
[in] PVOID Context
)
{...}
View the official Windows Driver Kit DDI referenceNo description available.
The PPARALLEL_IEEE_REV_TO_FWD-typed callback routine changes the transfer mode from reverse to forward. The system-supplied bus driver for parallel ports supplies this routine.
Context [in]Pointer to a device extension of a parallel device's physical device object (PDO).
| Return code | Description |
|---|---|
| STATUS_SUCCESS | The transfer mode was changed from reverse to forward. |
| STATUS_*Xxx* | An internal operation resulted in an NTSTATUS error. |
typedef NTSTATUS ( *PPARALLEL_IEEE_REV_TO_FWD)(
_In_ PVOID Context
);
To obtain a pointer to the system-supplied PPARALLEL_IEEE_REV_TO_FWD callback, a kernel-mode driver uses an IOCTL_INTERNAL_PARCLASS_CONNECT request, which returns a PARCLASS_INFORMATION structure. The IeeeRevToFwdMode member of the PARCLASS_INFORMATION structure is a pointer to this callback.
If the device is connected and is in the forward mode, the PPARALLEL_IEEE_REV_TO_FWD callback returns without further processing. Otherwise, the PPARALLEL_IEEE_REV_TO_FWD callback puts a parallel device in the forward mode and connects a previously negotiated forward protocol. The PNEGOTIATE_IEEE_MODE callback can be used to negotiate a forward protocol.
The PPARALLEL_IEEE_REV_TO_FWD callback runs in the caller's thread at the IRQL of the caller.