RxCreateRxContext function (rxcontx.h)

Artikel
10/21/2021

RxCreateRxContext allocates a new RX_CONTEXT structure and initializes the data structure.

Syntax

PRX_CONTEXT RxCreateRxContext(
  [in, optional] IN PIRP                 Irp,
  [in]           IN PRDBSS_DEVICE_OBJECT RxDeviceObject,
  [in]           IN ULONG                InitialContextFlags
);

Parameters

[in, optional] Irp

A pointer to the IRP to be encapsulated by this RX_CONTEXT structure.

[in] RxDeviceObject

A pointer to the device object to which this RX_CONTEXT and IRP apply.

[in] InitialContextFlags

The set of initial values for the Flags member of the RX_CONTEXT data structure to be stored in the RX_CONTEXT structure. These initial values can be any combination of the following enumerations:

RX_CONTEXT_FLAG_WAIT

When this value is set, the IRP should be not be posted for later execution by the file system process, but should be waited on to complete.

RX_CONTEXT_FLAG_MUST_SUCCEED

When this value is set, the operation must succeed. This value is not currently used by RDBSS, but it may be used by network mini-redirector drivers.

RX_CONTEXT_FLAG_MUST_SUCCEED_NONBLOCKING

When this value is set, the operation must succeed for non-blocking operations. This value is not currently used by RDBSS, but it may be used by network mini-redirector drivers.

Return value

RxCreateRxContext returns a pointer to an allocated RX_CONTEXT data structure on success or a NULL pointer on failure.

Remarks

RxCreateRxContext calls RxInitializeContext to initialize the newly created RX_CONTEXT structure before returning.

RxCreateRxContext allocates non-paged pool memory when creating a new RX_CONTEXT data structure and sets the following value in the Flags member of the RX_CONTEXT:

When this value is set, the RX_CONTEXT structure was allocated from non-paged pool memory.

Requirements

Requirement	Value
Target Platform	Desktop
Header	rxcontx.h (include Rxprocs.h rxcontx.h)
IRQL	<= APC_LEVEL

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