// Struct to be filled in to define a custom device tensor handle. Fields are
// required except where indicated.
typedef struct TFE_CustomDeviceTensorHandleMethods {
  int version = TFE_CUSTOM_DEVICE_VERSION;

  // Computes the rank of the tensor handle.
  //
  // Shapes are specified via callbacks because retrieving the shape of a tensor

        // ensure file is open
        if ( this.handle == null || !this.handle.isValid() ) {
            // one extra acquire to keep this open till the stream is released
            this.handle = this.file.openUnshared(this.openFlags, this.access, this.sharing, SmbConstants.ATTR_NORMAL, this.options).acquire();
            return this.handle;
        }
        return this.handle.acquire();
    }


    /**

        public int getOpnum() { return 0x01; }

        public int retval;
        public rpc.policy_handle handle;

        public SamrCloseHandle(rpc.policy_handle handle) {
            this.handle = handle;
        }

        public void encode_in(NdrBuffer _dst) throws NdrException {
            handle.encode(_dst);
        }
        public void decode_out(NdrBuffer _src) throws NdrException {

            return 0x01;
        }

        public int retval;
        public rpc.policy_handle handle;


        public SamrCloseHandle ( rpc.policy_handle handle ) {
            this.handle = handle;
        }


        @Override
        public void encode_in ( NdrBuffer _dst ) throws NdrException {
            this.handle.encode(_dst);
        }


        @Override

It helps a lot during **development**, but you **shouldn't** use it in **production**.

///

## Deployment Concepts

These examples run the server program (e.g Uvicorn), starting **a single process**, listening on all the IPs (`0.0.0.0`) on a predefined port (e.g. `80`).

This is the basic idea. But you will probably want to take care of some additional things, like:

* Security - HTTPS
* Running on startup

  dltensor_in->strides = strides.data();
  TFE_TensorHandle* handle = TFE_HandleFromDLPack(&dlm_in, status, ctx);
  ASSERT_NE(handle, nullptr)
      << TF_Message(status) << " (shape=[" << absl::StrJoin(shape, ",")
      << "], strides=[" << absl::StrJoin(strides, ",") << "])";

  auto* dlm_out =
      static_cast<DLManagedTensor*>(TFE_HandleToDLPack(handle, status));
  ASSERT_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);

	[op(0x01)]
	int SamrCloseHandle([in] policy_handle *handle);

	[op(0x39)]
	int SamrConnect2([in,string,unique] wchar_t *system_name,
			[in] uint32_t access_mask,
			[out] policy_handle *handle);

	[op(0x3e)]
	int SamrConnect4([in,string,unique] wchar_t *system_name,
			[in] uint32_t unknown,
			[in] uint32_t access_mask,
			[out] policy_handle *handle);

	[op(0x07)]
	int SamrOpenDomain([in] policy_handle *handle,

    private final DcerpcHandle handle;
    private boolean opened;


    public SamrAliasHandle ( DcerpcHandle handle, SamrDomainHandle domainHandle, int access, int rid ) throws IOException {
        this.handle = handle;
        MsrpcSamrOpenAlias rpc = new MsrpcSamrOpenAlias(domainHandle, access, rid, this);
        handle.sendrecv(rpc);
        if ( rpc.retval != 0 ) {

    private final DcerpcHandle handle;
    private boolean opened;


    public LsaPolicyHandle ( DcerpcHandle handle, String server, int access ) throws IOException {
        this.handle = handle;
        if ( server == null ) {
            server = "\\\\";
        }
        MsrpcLsarOpenPolicy2 rpc = new MsrpcLsarOpenPolicy2(server, access, this);
        handle.sendrecv(rpc);
        if ( rpc.retval != 0 ) {

import jcifs.smb1.dcerpc.*;

public class MsrpcSamrOpenAlias extends samr.SamrOpenAlias {

    public MsrpcSamrOpenAlias(SamrDomainHandle handle,
                    int access,
                    int rid,
                    SamrAliasHandle aliasHandle) {
        super(handle, access, rid, aliasHandle);
        ptype = 0;
        flags = DCERPC_FIRST_FRAG | DCERPC_LAST_FRAG;
    }