Async Services

Call OPC UA Services asynchronously with a callback. The (optional) requestId output can be used to cancel the service while it is still pending.

typedef void
(*UA_ClientAsyncReadCallback)(
    UA_Client *client, void *userdata,
    UA_UInt32 requestId, UA_ReadResponse *rr);

static UA_INLINE UA_THREADSAFE UA_StatusCode
UA_Client_sendAsyncReadRequest(
    UA_Client *client, UA_ReadRequest *request,
    UA_ClientAsyncReadCallback readCallback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_AsyncService(
        client, request, &UA_TYPES[UA_TYPES_READREQUEST],
        (UA_ClientAsyncServiceCallback)readCallback,
        &UA_TYPES[UA_TYPES_READRESPONSE], userdata, reqId);
}

typedef void
(*UA_ClientAsyncWriteCallback)(
    UA_Client *client, void *userdata,
    UA_UInt32 requestId, UA_WriteResponse *wr);

static UA_INLINE UA_THREADSAFE UA_StatusCode
UA_Client_sendAsyncWriteRequest(
    UA_Client *client, UA_WriteRequest *request,
    UA_ClientAsyncWriteCallback writeCallback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_AsyncService(
        client, request, &UA_TYPES[UA_TYPES_WRITEREQUEST],
        (UA_ClientAsyncServiceCallback)writeCallback,
        &UA_TYPES[UA_TYPES_WRITERESPONSE], userdata, reqId);
}

typedef void
(*UA_ClientAsyncBrowseCallback)(
    UA_Client *client, void *userdata,
    UA_UInt32 requestId, UA_BrowseResponse *wr);

static UA_INLINE UA_THREADSAFE UA_StatusCode
UA_Client_sendAsyncBrowseRequest(
    UA_Client *client, UA_BrowseRequest *request,
    UA_ClientAsyncBrowseCallback browseCallback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_AsyncService(
        client, request, &UA_TYPES[UA_TYPES_BROWSEREQUEST],
        (UA_ClientAsyncServiceCallback)browseCallback,
        &UA_TYPES[UA_TYPES_BROWSERESPONSE], userdata, reqId);
}

typedef void
(*UA_ClientAsyncBrowseNextCallback)(
    UA_Client *client, void *userdata,
    UA_UInt32 requestId, UA_BrowseNextResponse *wr);

static UA_INLINE UA_THREADSAFE UA_StatusCode
UA_Client_sendAsyncBrowseNextRequest(
    UA_Client *client, UA_BrowseNextRequest *request,
    UA_ClientAsyncBrowseNextCallback browseNextCallback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_AsyncService(
        client, request, &UA_TYPES[UA_TYPES_BROWSENEXTREQUEST],
        (UA_ClientAsyncServiceCallback)browseNextCallback,
        &UA_TYPES[UA_TYPES_BROWSENEXTRESPONSE], userdata, reqId);
}

Asynchronous Operations

Many Services can be called with an array of operations. For example, a request to the Read Service contains an array of ReadValueId, each corresponding to a single read operation. For convenience, wrappers are provided to call single operations for the most common Services.

All async operations have a callback of the following structure: The returned StatusCode is split in two parts. The status indicates the overall success of the request and the operation. The result argument is non-NULL only if the status is no good.

typedef void
(*UA_ClientAsyncOperationCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, void *result);

Read Attribute

Asynchronously read a single attribute. The attribute is unpacked from the response as the datatype of the attribute is known ahead of time. Value attributes are variants.

Note that the last argument (value pointer) of the callbacks can be NULL if the status of the operation is not good.

/* Reading a single attribute */
typedef void
(*UA_ClientAsyncReadAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_DataValue *attribute);

UA_StatusCode
UA_Client_readAttribute_async(
    UA_Client *client, const UA_ReadValueId *rvi,
    UA_TimestampsToReturn timestampsToReturn,
    UA_ClientAsyncReadAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single Value attribute */
typedef void
(*UA_ClientAsyncReadValueAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_DataValue *value);

UA_StatusCode
UA_Client_readValueAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadValueAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single DataType attribute */
typedef void
(*UA_ClientAsyncReadDataTypeAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_NodeId *dataType);

UA_StatusCode
UA_Client_readDataTypeAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadDataTypeAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single ArrayDimensions attribute. If the status is good, the variant
 * carries an UInt32 array. */
typedef void
(*UA_ClientReadArrayDimensionsAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_Variant *arrayDimensions);

UA_StatusCode
UA_Client_readArrayDimensionsAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientReadArrayDimensionsAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single NodeClass attribute */
typedef void
(*UA_ClientAsyncReadNodeClassAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_NodeClass *nodeClass);

UA_StatusCode
UA_Client_readNodeClassAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadNodeClassAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single BrowseName attribute */
typedef void
(*UA_ClientAsyncReadBrowseNameAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_QualifiedName *browseName);

UA_StatusCode
UA_Client_readBrowseNameAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadBrowseNameAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single DisplayName attribute */
typedef void
(*UA_ClientAsyncReadDisplayNameAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_LocalizedText *displayName);

UA_StatusCode
UA_Client_readDisplayNameAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadDisplayNameAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single Description attribute */
typedef void
(*UA_ClientAsyncReadDescriptionAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_LocalizedText *description);

UA_StatusCode
UA_Client_readDescriptionAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadDescriptionAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single WriteMask attribute */
typedef void
(*UA_ClientAsyncReadWriteMaskAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_UInt32 *writeMask);

UA_StatusCode
UA_Client_readWriteMaskAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadWriteMaskAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single UserWriteMask attribute */
typedef void
(*UA_ClientAsyncReadUserWriteMaskAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_UInt32 *writeMask);

UA_StatusCode
UA_Client_readUserWriteMaskAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadUserWriteMaskAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single IsAbstract attribute */
typedef void
(*UA_ClientAsyncReadIsAbstractAttributeCallback)(
      UA_Client *client, void *userdata, UA_UInt32 requestId,
      UA_StatusCode status, UA_Boolean *isAbstract);

UA_StatusCode
UA_Client_readIsAbstractAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadIsAbstractAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single Symmetric attribute */
typedef void
(*UA_ClientAsyncReadSymmetricAttributeCallback)(
      UA_Client *client, void *userdata, UA_UInt32 requestId,
      UA_StatusCode status, UA_Boolean *symmetric);

UA_StatusCode
UA_Client_readSymmetricAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadSymmetricAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single InverseName attribute */
typedef void
(*UA_ClientAsyncReadInverseNameAttributeCallback)(
      UA_Client *client, void *userdata, UA_UInt32 requestId,
      UA_StatusCode status, UA_LocalizedText *inverseName);

UA_StatusCode
UA_Client_readInverseNameAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadInverseNameAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single ContainsNoLoops attribute */
typedef void
(*UA_ClientAsyncReadContainsNoLoopsAttributeCallback)(
      UA_Client *client, void *userdata, UA_UInt32 requestId,
      UA_StatusCode status, UA_Boolean *containsNoLoops);

UA_StatusCode
UA_Client_readContainsNoLoopsAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadContainsNoLoopsAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single EventNotifier attribute */
typedef void
(*UA_ClientAsyncReadEventNotifierAttributeCallback)(
      UA_Client *client, void *userdata, UA_UInt32 requestId,
      UA_StatusCode status, UA_Byte *eventNotifier);

UA_StatusCode
UA_Client_readEventNotifierAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadEventNotifierAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single ValueRank attribute */
typedef void
(*UA_ClientAsyncReadValueRankAttributeCallback)(
      UA_Client *client, void *userdata, UA_UInt32 requestId,
      UA_StatusCode status, UA_Int32 *valueRank);

UA_StatusCode
UA_Client_readValueRankAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadValueRankAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single AccessLevel attribute */
typedef void
(*UA_ClientAsyncReadAccessLevelAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_Byte *accessLevel);

UA_StatusCode
UA_Client_readAccessLevelAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadAccessLevelAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single AccessLevelEx attribute */
typedef void
(*UA_ClientAsyncReadAccessLevelExAttributeCallback)(
      UA_Client *client, void *userdata, UA_UInt32 requestId,
      UA_StatusCode status, UA_UInt32 *accessLevelEx);

UA_StatusCode
UA_Client_readAccessLevelExAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadAccessLevelExAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single UserAccessLevel attribute */
typedef void
(*UA_ClientAsyncReadUserAccessLevelAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_Byte *userAccessLevel);

UA_StatusCode
UA_Client_readUserAccessLevelAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadUserAccessLevelAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single MinimumSamplingInterval attribute */
typedef void
(*UA_ClientAsyncReadMinimumSamplingIntervalAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_Double *minimumSamplingInterval);

UA_StatusCode
UA_Client_readMinimumSamplingIntervalAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadMinimumSamplingIntervalAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single Historizing attribute */
typedef void
(*UA_ClientAsyncReadHistorizingAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_Boolean *historizing);

UA_StatusCode
UA_Client_readHistorizingAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadHistorizingAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single Executable attribute */
typedef void
(*UA_ClientAsyncReadExecutableAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_Boolean *executable);

UA_StatusCode
UA_Client_readExecutableAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadExecutableAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

/* Read a single UserExecutable attribute */
typedef void
(*UA_ClientAsyncReadUserExecutableAttributeCallback)(
    UA_Client *client, void *userdata, UA_UInt32 requestId,
    UA_StatusCode status, UA_Boolean *userExecutable);

UA_StatusCode
UA_Client_readUserExecutableAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    UA_ClientAsyncReadUserExecutableAttributeCallback callback,
    void *userdata, UA_UInt32 *requestId);

Write Attribute

UA_StatusCode
__UA_Client_writeAttribute_async(
    UA_Client *client, const UA_NodeId *nodeId,
    UA_AttributeId attributeId, const void *in,
    const UA_DataType *inDataType,
    UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId);

static UA_INLINE UA_StatusCode
UA_Client_writeValueAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Variant *attr, UA_ClientAsyncWriteCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_VALUE, attr,
        &UA_TYPES[UA_TYPES_VARIANT],
        (UA_ClientAsyncServiceCallback)callback,
        userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeNodeIdAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_NodeId *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_NODEID, attr,
        &UA_TYPES[UA_TYPES_NODEID], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeNodeClassAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_NodeClass *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_NODECLASS, attr,
        &UA_TYPES[UA_TYPES_NODECLASS], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeBrowseNameAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_QualifiedName *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_BROWSENAME, attr,
        &UA_TYPES[UA_TYPES_QUALIFIEDNAME], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeDisplayNameAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_LocalizedText *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_DISPLAYNAME, attr,
        &UA_TYPES[UA_TYPES_LOCALIZEDTEXT], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeDescriptionAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_LocalizedText *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_DESCRIPTION, attr,
        &UA_TYPES[UA_TYPES_LOCALIZEDTEXT], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeWriteMaskAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_UInt32 *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_WRITEMASK, attr,
        &UA_TYPES[UA_TYPES_UINT32], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeUserWriteMaskAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_UInt32 *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_USERWRITEMASK, attr,
        &UA_TYPES[UA_TYPES_UINT32], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeIsAbstractAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Boolean *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_ISABSTRACT, attr,
        &UA_TYPES[UA_TYPES_BOOLEAN], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeSymmetricAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Boolean *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_SYMMETRIC, attr,
        &UA_TYPES[UA_TYPES_BOOLEAN], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeInverseNameAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_LocalizedText *attr,
    UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_INVERSENAME, attr,
        &UA_TYPES[UA_TYPES_LOCALIZEDTEXT], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeContainsNoLoopsAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Boolean *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_CONTAINSNOLOOPS, attr,
        &UA_TYPES[UA_TYPES_BOOLEAN], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeEventNotifierAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Byte *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_EVENTNOTIFIER, attr,
        &UA_TYPES[UA_TYPES_BYTE], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeDataTypeAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_NodeId *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_DATATYPE, attr,
        &UA_TYPES[UA_TYPES_NODEID], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeValueRankAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Int32 *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_VALUERANK, attr,
        &UA_TYPES[UA_TYPES_INT32], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeAccessLevelAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Byte *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_ACCESSLEVEL, attr,
        &UA_TYPES[UA_TYPES_BYTE], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeAccessLevelExAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_UInt32 *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_ACCESSLEVELEX, attr,
        &UA_TYPES[UA_TYPES_UINT32], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeUserAccessLevelAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Byte *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_USERACCESSLEVEL, attr,
        &UA_TYPES[UA_TYPES_BYTE], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeMinimumSamplingIntervalAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Double *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_MINIMUMSAMPLINGINTERVAL,
        attr, &UA_TYPES[UA_TYPES_DOUBLE], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeHistorizingAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Boolean *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_HISTORIZING, attr,
        &UA_TYPES[UA_TYPES_BOOLEAN], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeExecutableAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Boolean *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_EXECUTABLE, attr,
        &UA_TYPES[UA_TYPES_BOOLEAN], callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_writeUserExecutableAttribute_async(
    UA_Client *client, const UA_NodeId nodeId,
    const UA_Boolean *attr, UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_writeAttribute_async(
        client, &nodeId, UA_ATTRIBUTEID_USEREXECUTABLE, attr,
        &UA_TYPES[UA_TYPES_BOOLEAN], callback, userdata, reqId);
}

Method Calling

UA_StatusCode
__UA_Client_call_async(
    UA_Client *client,
    const UA_NodeId objectId, const UA_NodeId methodId,
    size_t inputSize, const UA_Variant *input,
    UA_ClientAsyncServiceCallback callback,
    void *userdata, UA_UInt32 *reqId);

typedef void
(*UA_ClientAsyncCallCallback)(
    UA_Client *client, void *userdata,
    UA_UInt32 requestId, UA_CallResponse *cr);

static UA_INLINE UA_StatusCode
UA_Client_call_async(
    UA_Client *client,
    const UA_NodeId objectId, const UA_NodeId methodId,
    size_t inputSize, const UA_Variant *input,
    UA_ClientAsyncCallCallback callback, void *userdata,
    UA_UInt32 *reqId) {
    return __UA_Client_call_async(
        client, objectId, methodId, inputSize, input,
        (UA_ClientAsyncServiceCallback)callback, userdata, reqId);
}

Node Management

typedef void
(*UA_ClientAsyncAddNodesCallback)(
    UA_Client *client, void *userdata,
    UA_UInt32 requestId, UA_AddNodesResponse *ar);

UA_StatusCode
__UA_Client_addNode_async(
    UA_Client *client, const UA_NodeClass nodeClass,
    const UA_NodeId requestedNewNodeId, const UA_NodeId parentNodeId,
    const UA_NodeId referenceTypeId, const UA_QualifiedName browseName,
    const UA_NodeId typeDefinition, const UA_NodeAttributes *attr,
    const UA_DataType *attributeType, UA_NodeId *outNewNodeId,
    UA_ClientAsyncServiceCallback callback, void *userdata,
    UA_UInt32 *reqId);

static UA_INLINE UA_StatusCode
UA_Client_addVariableNode_async(
    UA_Client *client, const UA_NodeId requestedNewNodeId,
    const UA_NodeId parentNodeId, const UA_NodeId referenceTypeId,
    const UA_QualifiedName browseName, const UA_NodeId typeDefinition,
    const UA_VariableAttributes attr, UA_NodeId *outNewNodeId,
    UA_ClientAsyncAddNodesCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_addNode_async(
        client, UA_NODECLASS_VARIABLE, requestedNewNodeId,
        parentNodeId, referenceTypeId, browseName,
        typeDefinition, (const UA_NodeAttributes *)&attr,
        &UA_TYPES[UA_TYPES_VARIABLEATTRIBUTES], outNewNodeId,
        (UA_ClientAsyncServiceCallback)callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_addVariableTypeNode_async(
    UA_Client *client, const UA_NodeId requestedNewNodeId,
    const UA_NodeId parentNodeId, const UA_NodeId referenceTypeId,
    const UA_QualifiedName browseName,
    const UA_VariableTypeAttributes attr,
    UA_NodeId *outNewNodeId, UA_ClientAsyncAddNodesCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_addNode_async(
        client, UA_NODECLASS_VARIABLETYPE,
        requestedNewNodeId, parentNodeId,
        referenceTypeId, browseName, UA_NODEID_NULL,
        (const UA_NodeAttributes *)&attr,
        &UA_TYPES[UA_TYPES_VARIABLETYPEATTRIBUTES],
        outNewNodeId, (UA_ClientAsyncServiceCallback)callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_addObjectNode_async(
    UA_Client *client, const UA_NodeId requestedNewNodeId,
    const UA_NodeId parentNodeId, const UA_NodeId referenceTypeId,
    const UA_QualifiedName browseName, const UA_NodeId typeDefinition,
    const UA_ObjectAttributes attr, UA_NodeId *outNewNodeId,
    UA_ClientAsyncAddNodesCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_addNode_async(
        client, UA_NODECLASS_OBJECT, requestedNewNodeId,
        parentNodeId, referenceTypeId,
        browseName, typeDefinition, (const UA_NodeAttributes *)&attr,
        &UA_TYPES[UA_TYPES_OBJECTATTRIBUTES], outNewNodeId,
        (UA_ClientAsyncServiceCallback)callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_addObjectTypeNode_async(
    UA_Client *client, const UA_NodeId requestedNewNodeId,
    const UA_NodeId parentNodeId, const UA_NodeId referenceTypeId,
    const UA_QualifiedName browseName,
    const UA_ObjectTypeAttributes attr,
    UA_NodeId *outNewNodeId, UA_ClientAsyncAddNodesCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_addNode_async(
        client, UA_NODECLASS_OBJECTTYPE, requestedNewNodeId, parentNodeId,
        referenceTypeId, browseName, UA_NODEID_NULL,
        (const UA_NodeAttributes *)&attr,
        &UA_TYPES[UA_TYPES_OBJECTTYPEATTRIBUTES], outNewNodeId,
        (UA_ClientAsyncServiceCallback)callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_addViewNode_async(
    UA_Client *client, const UA_NodeId requestedNewNodeId,
    const UA_NodeId parentNodeId, const UA_NodeId referenceTypeId,
    const UA_QualifiedName browseName, const UA_ViewAttributes attr,
    UA_NodeId *outNewNodeId, UA_ClientAsyncAddNodesCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_addNode_async(
        client, UA_NODECLASS_VIEW, requestedNewNodeId,
        parentNodeId, referenceTypeId,
        browseName, UA_NODEID_NULL, (const UA_NodeAttributes *)&attr,
        &UA_TYPES[UA_TYPES_VIEWATTRIBUTES], outNewNodeId,
        (UA_ClientAsyncServiceCallback)callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_addReferenceTypeNode_async(
    UA_Client *client, const UA_NodeId requestedNewNodeId,
    const UA_NodeId parentNodeId, const UA_NodeId referenceTypeId,
    const UA_QualifiedName browseName,
    const UA_ReferenceTypeAttributes attr,
    UA_NodeId *outNewNodeId, UA_ClientAsyncAddNodesCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_addNode_async(
        client, UA_NODECLASS_REFERENCETYPE, requestedNewNodeId, parentNodeId,
        referenceTypeId, browseName, UA_NODEID_NULL,
        (const UA_NodeAttributes *)&attr,
        &UA_TYPES[UA_TYPES_REFERENCETYPEATTRIBUTES], outNewNodeId,
        (UA_ClientAsyncServiceCallback)callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_addDataTypeNode_async(
    UA_Client *client, const UA_NodeId requestedNewNodeId,
    const UA_NodeId parentNodeId, const UA_NodeId referenceTypeId,
    const UA_QualifiedName browseName, const UA_DataTypeAttributes attr,
    UA_NodeId *outNewNodeId, UA_ClientAsyncAddNodesCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_addNode_async(
        client, UA_NODECLASS_DATATYPE, requestedNewNodeId,
        parentNodeId, referenceTypeId, browseName,
        UA_NODEID_NULL, (const UA_NodeAttributes *)&attr,
        &UA_TYPES[UA_TYPES_DATATYPEATTRIBUTES], outNewNodeId,
        (UA_ClientAsyncServiceCallback)callback, userdata, reqId);
}

static UA_INLINE UA_StatusCode
UA_Client_addMethodNode_async(
    UA_Client *client, const UA_NodeId requestedNewNodeId,
    const UA_NodeId parentNodeId, const UA_NodeId referenceTypeId,
    const UA_QualifiedName browseName, const UA_MethodAttributes attr,
    UA_NodeId *outNewNodeId, UA_ClientAsyncAddNodesCallback callback,
    void *userdata, UA_UInt32 *reqId) {
    return __UA_Client_addNode_async(
        client, UA_NODECLASS_METHOD, requestedNewNodeId, parentNodeId,
        referenceTypeId, browseName, UA_NODEID_NULL,
        (const UA_NodeAttributes *)&attr,
        &UA_TYPES[UA_TYPES_METHODATTRIBUTES], outNewNodeId,
        (UA_ClientAsyncServiceCallback)callback, userdata, reqId);
}