Edit

AcxStreamAddConnections function (acxstreams.h)

  • Article

The AcxStreamAddConnections function adds explicit connections to a new ACX stream during EvtAcxCircuitCreateStream

Syntax

NTSTATUS AcxStreamAddConnections(
  ACXSTREAM       Stream,
  PACX_CONNECTION Connections,
  ULONG           ConnectionsCount
);

Parameters

Stream

An existing ACXSTREAM stream object. For more information, see ACX - Summary of ACX Objects.

Connections

An ACX_CONNECTION structure that contains information about the connections to add the stream.

ConnectionsCount

The number of connections that are in the stream. This is a 1 based count.

Return value

Returns STATUS_SUCCESS if the call was successful. Otherwise, it returns an appropriate error code. For more information, see Using NTSTATUS Values.

Remarks

If the driver does not call AcxStreamAddConnections during EvtAcxCircuitCreateStream, the ACX framework will automatically assign connections between any ACXELEMENT objects that were added to the ACXSTREAM.

Example

Example usage is shown below.

    //
    // Explicitly connect the elements of the stream. Note that the driver doesn't 
    // need to perform this step when elements are connected in the same order
    // as they were added to the stream.
    //

    const int numElements = 2;
    const int numConnections = numElements + 1;

    ACXSTREAM                      Stream;

    ACX_CONNECTION connections[numConnections];
    ACX_CONNECTION_INIT(&connections[0], Stream, Elements[ElementCount - 2]);
    ACX_CONNECTION_INIT(&connections[1], Elements[ElementCount - 2], Elements[ElementCount - 1]);
    ACX_CONNECTION_INIT(&connections[2], Elements[ElementCount - 1], Stream);

    //
    // Add the connections linking stream to elements.
    //
    status = AcxStreamAddConnections(Stream, connections, SIZEOF_ARRAY(connections));

ACX requirements

Minimum ACX version: 1.0

For more information about ACX versions, see ACX version overview.

Requirements

Requirement Value
Header acxstreams.h
IRQL PASSIVE_LEVEL

See also