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NS:parallel._PARALLEL_PORT_INFORMATION

_PARALLEL_PORT_INFORMATION (parallel.h)

The PARALLEL_PORT_INFORMATION structure specifies information about the resources assigned to a parallel port, the capabilities of the parallel port, and pointers to callback routines that a kernel-mode driver can use to operate the parallel port.

parports\parallel_port_information.htm

parports

02/15/2018

PARALLEL_PORT_INFORMATION structure

*PPARALLEL_PORT_INFORMATION, PARALLEL_PORT_INFORMATION, PARALLEL_PORT_INFORMATION structure [Parallel Ports], PPARALLEL_PORT_INFORMATION, PPARALLEL_PORT_INFORMATION structure pointer [Parallel Ports], _PARALLEL_PORT_INFORMATION, cisspd_ca857237-0c57-46e9-aedf-f6d40a25dbf8.xml, parallel/PARALLEL_PORT_INFORMATION, parallel/PPARALLEL_PORT_INFORMATION, parports.parallel_port_information

parallel.h

Parallel.h

Windows

PARALLEL_PORT_INFORMATION, *PPARALLEL_PORT_INFORMATION

_PARALLEL_PORT_INFORMATION

parallel/_PARALLEL_PORT_INFORMATION

PPARALLEL_PORT_INFORMATION

parallel/PPARALLEL_PORT_INFORMATION

PARALLEL_PORT_INFORMATION

parallel/PARALLEL_PORT_INFORMATION

APIRef

kbSyntax

HeaderDef

parallel.h

_PARALLEL_PORT_INFORMATION

PPARALLEL_PORT_INFORMATION

PARALLEL_PORT_INFORMATION

_PARALLEL_PORT_INFORMATION structure

-description

The PARALLEL_PORT_INFORMATION structure specifies information about the resources assigned to a parallel port, the capabilities of the parallel port, and pointers to callback routines that a kernel-mode driver can use to operate the parallel port.

-struct-fields

-field OriginalController

Specifies the bus relative base I/O address of the parallel port registers.

-field Controller

Pointer to the system-mapped base I/O location of the parallel port registers.

-field SpanOfController

Specifies the size, in bytes, of the I/O space, allocated to the parallel port.

-field TryAllocatePort

Pointer to the system-supplied PPARALLEL_TRY_ALLOCATE_ROUTINE callback that a kernel-mode driver can use to attempt to allocate the parallel port.

-field FreePort

Pointer to the system-supplied PPARALLEL_FREE_ROUTINE callback that a kernel-mode driver can use to free the parallel port.

-field QueryNumWaiters

Pointer to the system-supplied PPARALLEL_QUERY_WAITERS_ROUTINE callback that a kernel-mode driver can use to determine the number of requests on the work queue of the parallel port.

-field Context

Pointer to the device extension of parallel port.

-syntax

typedef struct _PARALLEL_PORT_INFORMATION {
  PHYSICAL_ADDRESS                OriginalController;
  PUCHAR                          Controller;
  ULONG                           SpanOfController;
  PPARALLEL_TRY_ALLOCATE_ROUTINE  TryAllocatePort;
  PPARALLEL_FREE_ROUTINE          FreePort;
  PPARALLEL_QUERY_WAITERS_ROUTINE QueryNumWaiters;
  PVOID                           Context;
} PARALLEL_PORT_INFORMATION, *PPARALLEL_PORT_INFORMATION;

-remarks

An IRP_MN_START_DEVICE request from the Plug and Play manager passes a translated resource list that contains the port information in a PARALLEL_PORT_INFORMATION structure. The system-supplied function driver for parallel ports saves the information in the extension of the parallel port and returns the information in response to an IOCTL_INTERNAL_GET_PARALLEL_PORT_INFO request.