TensorFlow DLL for Windows (64 bits)

[Antonio Linares]

http://ci.tensorflow.org/view/Nightly/job/nightly-libtensorflow-windows/

http://ci.tensorflow.org/view/Nightly/job/nightly-libtensorflow-windows/lastSuccessfulBuild/artifact/lib_package/libtensorflow-cpu-windows-x86_64.zip

Using tensorflow.dll from a FWH 64 bits app:

tf.prg

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#include "FiveWin.ch"

function Main()

   MsgInfo( TF_Version() )

return nil

DLL FUNCTION TF_Version() AS LPSTR LIB "tensorflow.dll"

TensorFlow documentation:
https://tensorflow.github.io/rust/tensorflow_sys/index.html

[Antonio Linares]

I have asked them for a 32 bits tensorflow.dll version:

https://github.com/migueldeicaza/TensorFlowSharp/issues/49

[Antonio Linares]

Starting to use TensorFlow:

tf.prg

Code: Select all  Expand view

#include "FiveWin.ch"

static hDLL

function Main()

   local hSession, hStatus

   hDLL = LoadLibrary( "tensorflow.dll" )

   MsgInfo( TF_Version() )

   hSession = TF_NewSessionOptions()
   hStatus = TF_NewStatus()

   MsgInfo( hSession )
   MsgInfo( hStatus )

   FreeLibrary( hDLL )

return nil

DLL FUNCTION TF_Version() AS LPSTR LIB hDLL

DLL FUNCTION TF_NewSessionOptions() AS LONG LIB hDLL

DLL FUNCTION TF_NewStatus() AS LONG LIB hDLL

Using this example as a tutorial:
https://docs.rs/crate/tensorflow-sys/0.3.1/source/examples/workflow.rs

[Antonio Linares]

Creating our first TF session:

tf.prg

Code: Select all  Expand view

#include "FiveWin.ch"

static hDLL

function Main()

   local hGraph, hOptions, hStatus, hSession

   hDLL = LoadLibrary( "tensorflow.dll" )

   MsgInfo( TF_Version() )

   hGraph = TF_NewGraph()
   hOptions = TF_NewSessionOptions()
   hStatus = TF_NewStatus()
   hSession = TF_NewSession( hGraph, hOptions, hStatus )

   MsgInfo( hSession )

   FreeLibrary( hDLL )

return nil

DLL FUNCTION TF_Version() AS LPSTR LIB hDLL

DLL FUNCTION TF_NewGraph() AS LONG LIB hDLL

DLL FUNCTION TF_NewSessionOptions() AS LONG LIB hDLL

DLL FUNCTION TF_NewStatus() AS LONG LIB hDLL

DLL FUNCTION TF_NewSession( hGraph AS LONG, hOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

[Antonio Linares]

Cleaning the created objetcs:

tf.prg

Code: Select all  Expand view

#include "FiveWin.ch"

static hDLL

function Main()

   local hGraph, hOptions, hStatus, hSession

   hDLL = LoadLibrary( "tensorflow.dll" )

   MsgInfo( TF_Version() )

   hGraph = TF_NewGraph()
   hOptions = TF_NewSessionOptions()
   hStatus = TF_NewStatus()
   hSession = TF_NewSession( hGraph, hOptions, hStatus )

   MsgInfo( hSession )

   TF_CloseSession( hSession, hStatus )
   TF_DeleteSession( hSession, hStatus )
   TF_DeleteStatus( hStatus )
   TF_DeleteSessionOptions( hOptions )

   FreeLibrary( hDLL )

return nil

DLL FUNCTION TF_Version() AS LPSTR LIB hDLL

DLL FUNCTION TF_NewGraph() AS LONG LIB hDLL

DLL FUNCTION TF_NewSessionOptions() AS LONG LIB hDLL

DLL FUNCTION TF_NewStatus() AS LONG LIB hDLL

DLL FUNCTION TF_NewSession( hGraph AS LONG, hOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_CloseSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteStatus( hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSessionOptions( hOptions AS LONG ) AS VOID LIB hDLL

[thefull]

Ohh fantástico!!!

[cnavarro]

Genial Antonio

[Antonio Linares]

Importing a TensorFlow Graph definition file:

Download the Graph definition file from here:
https://bitbucket.org/fivetech/fivewin-contributions/downloads/graph.pb
It has been created using this python code: https://docs.rs/crate/tensorflow-sys/0.3.1/source/examples/fixtures/graph.py

tf.prg

Code: Select all  Expand view

#include "FiveWin.ch"

static hDLL

function Main()

   local hGraph, hOptions, hStatus, hSession
   local hGraphDefOptions
   local cGraph := MemoRead( "graph.pb" )

   hDLL = LoadLibrary( "tensorflow.dll" )

   MsgInfo( TF_Version() )

   hGraph = TF_NewGraph()
   hOptions = TF_NewSessionOptions()
   hStatus = TF_NewStatus()
   hSession = TF_NewSession( hGraph, hOptions, hStatus )

   MsgInfo( hSession )
   
   hGraphDefOptions = TF_NewImportGraphDefOptions()
   
   TF_GraphImportGraphDef( hGraph, TF_NewBufferFromString( cGraph, Len( cGraph ) ), hGraphDefOptions, hStatus )

   MsgInfo( TF_GetCode( hStatus ), "zero means success" )

   TF_CloseSession( hSession, hStatus )
   TF_DeleteSession( hSession, hStatus )
   TF_DeleteStatus( hStatus )
   TF_DeleteSessionOptions( hOptions )
   TF_DeleteImportGraphDefOptions( hGraphDefOptions )

   FreeLibrary( hDLL )

return nil

DLL FUNCTION TF_Version() AS LPSTR LIB hDLL

DLL FUNCTION TF_NewGraph() AS LONG LIB hDLL

DLL FUNCTION TF_NewSessionOptions() AS LONG LIB hDLL

DLL FUNCTION TF_NewStatus() AS LONG LIB hDLL

DLL FUNCTION TF_NewSession( hGraph AS LONG, hOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_CloseSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteStatus( hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSessionOptions( hOptions AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_NewImportGraphDefOptions() AS LONG LIB hDLL

DLL FUNCTION TF_GraphImportGraphDef( hGraph AS LONG, hBuffer AS LONG, hGraphDefOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_NewBufferFromString( cString AS LPSTR, nLegth AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_GetCode( hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_DeleteImportGraphDefOptions( hGraphDefOptions AS LONG ) AS LONG LIB hDLL
 

[Antonio Linares]

Creating a Tensor from a string and also implementing a Class TensorFlow to simplify the code:

TensorFlow programs use a tensor data structure to represent all data. You can think of a TensorFlow tensor as an n-dimensional array or list. A tensor has a static type and dynamic dimensions. Only tensors may be passed between nodes in the computation graph.

https://www.tensorflow.org/programmers_guide/dims_types

tf.prg

Code: Select all  Expand view

#include "FiveWin.ch"

#define TF_STRING  6

static hDLL

function Main()

   local oTF := TensorFlow():New()

   MsgInfo( oTF:Version() )

   MsgInfo( oTF:TensorString( "Hello TensorFlow" ) )

   oTF:End()

return nil

CLASS TensorFlow

   DATA hGraph
   DATA hOptions
   DATA hStatus
   DATA hSession

   METHOD New()
   
   METHOD Version() INLINE TF_Version()

   METHOD TensorString( cString )

   METHOD End()

ENDCLASS

METHOD New() CLASS TensorFlow

   hDLL = LoadLibrary( "tensorflow.dll" )

   ::hGraph = TF_NewGraph()
   ::hOptions = TF_NewSessionOptions()
   ::hStatus = TF_NewStatus()
   ::hSession = TF_NewSession( ::hGraph, ::hOptions, ::hStatus )
     
return Self    

METHOD End() CLASS TensorFlow

   TF_CloseSession( ::hSession, ::hStatus )
   TF_DeleteSession( ::hSession, ::hStatus )
   TF_DeleteStatus( ::hStatus )
   TF_DeleteSessionOptions( ::hOptions )

   FreeLibrary( hDLL )

return nil

METHOD TensorString( cString ) CLASS TensorFlow

   local hTensor := TF_AllocateTensor( TF_STRING, 0, 0, 8 + TF_StringEncodedSize( Len( cString ) ) )
   local nError
   
   TF_StringEncode( cString, Len( cString ), 8 + TF_TensorData( hTensor ), TF_StringEncodedSize( Len( cString ) ), ::hStatus )

   if ( nError := TF_GetCode( ::hStatus ) ) != 0
      MsgAlert( nError, "Error creating a Tensor string" )
   endif
   
return hTensor  

DLL FUNCTION TF_Version() AS LPSTR LIB hDLL

DLL FUNCTION TF_NewGraph() AS LONG LIB hDLL

DLL FUNCTION TF_NewSessionOptions() AS LONG LIB hDLL

DLL FUNCTION TF_NewStatus() AS LONG LIB hDLL

DLL FUNCTION TF_NewSession( hGraph AS LONG, hOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_CloseSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteStatus( hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSessionOptions( hOptions AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_NewImportGraphDefOptions() AS LONG LIB hDLL

DLL FUNCTION TF_GraphImportGraphDef( hGraph AS LONG, hBuffer AS LONG, hGraphDefOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_NewBufferFromString( cString AS LPSTR, nLegth AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_GetCode( hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_DeleteImportGraphDefOptions( hGraphDefOptions AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_NewTensor( nType AS LONG, pDims AS LONG, nDims AS LONG, pData AS LONG, nLength AS LONG, pDeallocator AS LONG,;
                           pDeallocatorArgs AS LONG ) AS LONG LIB hDLL
                           
DLL FUNCTION TF_AllocateTensor( nType AS LONG, pDims AS LONG, nDims AS LONG, nLegth AS LONG ) AS LONG LIB hDLL
                           
DLL FUNCTION TF_StringEncodedSize( nLength AS LONG ) AS LONG LIB hDLL    

DLL FUNCTION TF_TensorData( hTensor AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_StringEncode( cString AS LPSTR, nLength AS LONG, pDest AS LONG, nDestLength AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_SessionRun( hSession AS LONG, hRunOptions AS LONG, hInputs AS LONG, hInputValues AS LONG, nInputs AS LONG,;
                            hOutputs AS LONG, hOutputValues AS LONG, nOutputs AS LONG, hTargetOperations AS LONG, nTargets AS LONG,;
                            hRunMetadata AS LONG, hStatus AS LONG ) AS VOID LIB hDLL
 

[Antonio Linares]

Implemented Method ImportGraph( cFileName )

Download the Graph definition file from here:
https://bitbucket.org/fivetech/fivewin-contributions/downloads/graph.pb

tf.prg

Code: Select all  Expand view

#include "FiveWin.ch"

#define TF_STRING  6

static hDLL

function Main()

   local oTF := TensorFlow():New()

   MsgInfo( oTF:Version() )

   MsgInfo( oTF:TensorString( "Hello TensorFlow" ) )

   oTF:ImportGraph( "graph.pb" )

   oTF:End()

return nil

CLASS TensorFlow

   DATA hGraph
   DATA hOptions
   DATA hStatus
   DATA hSession

   METHOD New()
   
   METHOD Version() INLINE TF_Version()

   METHOD ImportGraph( cFileName )

   METHOD TensorString( cString )

   METHOD End()

ENDCLASS

METHOD New() CLASS TensorFlow

   hDLL = LoadLibrary( "tensorflow.dll" )

   ::hGraph = TF_NewGraph()
   ::hOptions = TF_NewSessionOptions()
   ::hStatus = TF_NewStatus()
   ::hSession = TF_NewSession( ::hGraph, ::hOptions, ::hStatus )
     
return Self    

METHOD End() CLASS TensorFlow

   TF_CloseSession( ::hSession, ::hStatus )
   TF_DeleteSession( ::hSession, ::hStatus )
   TF_DeleteStatus( ::hStatus )
   TF_DeleteSessionOptions( ::hOptions )

   FreeLibrary( hDLL )

return nil

METHOD ImportGraph( cFileName ) CLASS TensorFlow

   local cGraph := MemoRead( cFileName )
   local hGraphDefOptions := TF_NewImportGraphDefOptions()
   
   TF_GraphImportGraphDef( ::hGraph, TF_NewBufferFromString( cGraph, Len( cGraph ) ), hGraphDefOptions, ::hStatus )
   
   if ( nError := TF_GetCode( ::hStatus ) ) != 0
      MsgAlert( nError, "Error importing a Graph file" )
   endif
   
   TF_DeleteImportGraphDefOptions( hGraphDefOptions )
   
return nil  

METHOD TensorString( cString ) CLASS TensorFlow

   local hTensor := TF_AllocateTensor( TF_STRING, 0, 0, 8 + TF_StringEncodedSize( Len( cString ) ) )
   local nError
   
   TF_StringEncode( cString, Len( cString ), 8 + TF_TensorData( hTensor ), TF_StringEncodedSize( Len( cString ) ), ::hStatus )

   if ( nError := TF_GetCode( ::hStatus ) ) != 0
      MsgAlert( nError, "Error creating a Tensor string" )
   endif
   
return hTensor  

DLL FUNCTION TF_Version() AS LPSTR LIB hDLL

DLL FUNCTION TF_NewGraph() AS LONG LIB hDLL

DLL FUNCTION TF_NewSessionOptions() AS LONG LIB hDLL

DLL FUNCTION TF_NewStatus() AS LONG LIB hDLL

DLL FUNCTION TF_NewSession( hGraph AS LONG, hOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_CloseSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteStatus( hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSessionOptions( hOptions AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_NewImportGraphDefOptions() AS LONG LIB hDLL

DLL FUNCTION TF_GraphImportGraphDef( hGraph AS LONG, hBuffer AS LONG, hGraphDefOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_NewBufferFromString( cString AS LPSTR, nLegth AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_GetCode( hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_DeleteImportGraphDefOptions( hGraphDefOptions AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_NewTensor( nType AS LONG, pDims AS LONG, nDims AS LONG, pData AS LONG, nLength AS LONG, pDeallocator AS LONG,;
                           pDeallocatorArgs AS LONG ) AS LONG LIB hDLL
                           
DLL FUNCTION TF_AllocateTensor( nType AS LONG, pDims AS LONG, nDims AS LONG, nLegth AS LONG ) AS LONG LIB hDLL
                           
DLL FUNCTION TF_StringEncodedSize( nLength AS LONG ) AS LONG LIB hDLL    

DLL FUNCTION TF_TensorData( hTensor AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_StringEncode( cString AS LPSTR, nLength AS LONG, pDest AS LONG, nDestLength AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_SessionRun( hSession AS LONG, hRunOptions AS LONG, hInputs AS LONG, hInputValues AS LONG, nInputs AS LONG,;
                            hOutputs AS LONG, hOutputValues AS LONG, nOutputs AS LONG, hTargetOperations AS LONG, nTargets AS LONG,;
                            hRunMetadata AS LONG, hStatus AS LONG ) AS VOID LIB hDLL
 

[Antonio Linares]

TensorFlow C API header file:

https://github.com/tensorflow/tensorflow/blob/master/tensorflow/c/c_api.h

https://github.com/tensorflow/tensorflow/blob/master/tensorflow/c/c_api_test.cc

Code: Select all  Expand view

TF_CAPI_EXPORT extern void TF_SessionRun(
    TF_Session* session,
    // RunOptions
    const TF_Buffer* run_options,
    // Input tensors
    const TF_Output* inputs, TF_Tensor* const* input_values, int ninputs,
    // Output tensors
    const TF_Output* outputs, TF_Tensor** output_values, int noutputs,
    // Target operations
    const TF_Operation* const* target_opers, int ntargets,
    // RunMetadata
    TF_Buffer* run_metadata,
    // Output status
    TF_Status*);

Code: Select all  Expand view

// Represents a specific output of an operation.
typedef struct TF_Output {
  TF_Operation* oper;
  int index;  // The index of the output within oper.
} TF_Output;

https://tensorflow.github.io/rust/tensorflow_sys/fn.TF_NewOperation.html

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pub unsafe extern fn TF_NewOperation(graph: *mut TF_Graph,
                                     op_type: *const c_char,
                                     operation_name: *const c_char)
                                     -> *mut TF_OperationDescription

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pub unsafe extern fn TF_FinishOperation(desc: *mut TF_OperationDescription,
                                        status: *mut TF_Status)
                                        -> *mut TF_Operation

[Antonio Linares]

Running our first TensorFlow session:

(not sure yet how to retrieve the result)

tf.prg

Code: Select all  Expand view

#include "FiveWin.ch"

#define TF_STRING  6

static hDLL

function Main()

   local oTF := TensorFlow():New()
   local hTensor, hOperationDescription, hOperation

   MsgInfo( oTF:Version() )

   hTensor = oTF:TensorString( "Hello TensorFlow" )
   hOperationDescription = TF_NewOperation( oTF:hGraph, "Const", "hello" )
   TF_SetAttrTensor( hOperationDescription, "value", hTensor, oTF:hStatus )
   TF_SetAttrType( hOperationDescription, "dtype", TF_TensorType( hTensor ) )
   hOperation = TF_FinishOperation( hOperationDescription, oTF:hStatus )


   TF_SessionRun( oTF:hSession, 0,;
                  0, 0, 0,;  // Inputs
                  TF_Output( hOperation ), hTensor, 1,;  // Outputs
                  hOperation, 1,;  // Operations
                  0, oTF:hStatus )
   
   MsgInfo( oTF:StatusCode(), "zero means ok" )

   oTF:End()

return nil

CLASS TensorFlow

   DATA hGraph
   DATA hOptions
   DATA hStatus
   DATA hSession

   METHOD New()
   
   METHOD Version() INLINE TF_Version()

   METHOD ImportGraph( cFileName )

   METHOD TensorString( cString )

   METHOD End()
   
   METHOD StatusCode() INLINE TF_GetCode( ::hStatus )

   METHOD Variable( cVarName, nDataType )

ENDCLASS

METHOD New() CLASS TensorFlow

   hDLL = LoadLibrary( "tensorflow.dll" )

   ::hGraph = TF_NewGraph()
   ::hOptions = TF_NewSessionOptions()
   ::hStatus = TF_NewStatus()
   ::hSession = TF_NewSession( ::hGraph, ::hOptions, ::hStatus )
     
return Self    

METHOD End() CLASS TensorFlow

   TF_CloseSession( ::hSession, ::hStatus )
   TF_DeleteSession( ::hSession, ::hStatus )
   TF_DeleteStatus( ::hStatus )
   TF_DeleteSessionOptions( ::hOptions )

   FreeLibrary( hDLL )

return nil

METHOD ImportGraph( cFileName ) CLASS TensorFlow

   local cGraph := MemoRead( cFileName )
   local hGraphDefOptions := TF_NewImportGraphDefOptions()
   
   TF_GraphImportGraphDef( ::hGraph, TF_NewBufferFromString( cGraph, Len( cGraph ) ), hGraphDefOptions, ::hStatus )
   
   if TF_GetCode( ::hStatus ) != 0
      MsgAlert( TF_Message( ::hStatus ), "Error importing a Graph file" )
   endif
   
   TF_DeleteImportGraphDefOptions( hGraphDefOptions )
   
return nil  

METHOD TensorString( cString ) CLASS TensorFlow

   local hTensor := TF_AllocateTensor( TF_STRING, 0, 0, 8 + TF_StringEncodedSize( Len( cString ) ) )
   
   TF_StringEncode( cString, Len( cString ), 8 + TF_TensorData( hTensor ), TF_StringEncodedSize( Len( cString ) ), ::hStatus )

   if TF_GetCode( ::hStatus ) != 0
      MsgAlert( TF_Message( ::hStatus ), "Error creating a Tensor string" )
   endif
   
return hTensor  

METHOD Variable( cVarName, nDataType ) CLASS TensorFlow

   local hOperationDescription := TF_NewOperation( ::hGraph, "Variable", cVarName )

   TF_SetAttrType( hOperationDescription, "dtype", nDataType )

return TF_FinishOperation( hOperationDescription, ::hStatus )

DLL FUNCTION TF_Version() AS LPSTR LIB hDLL

DLL FUNCTION TF_NewGraph() AS LONG LIB hDLL

DLL FUNCTION TF_NewSessionOptions() AS LONG LIB hDLL

DLL FUNCTION TF_NewStatus() AS LONG LIB hDLL

DLL FUNCTION TF_NewSession( hGraph AS LONG, hOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_CloseSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSession( hSession AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteStatus( hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_DeleteSessionOptions( hOptions AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_NewImportGraphDefOptions() AS LONG LIB hDLL

DLL FUNCTION TF_GraphImportGraphDef( hGraph AS LONG, hBuffer AS LONG, hGraphDefOptions AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_NewBufferFromString( cString AS LPSTR, nLegth AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_GetCode( hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_DeleteImportGraphDefOptions( hGraphDefOptions AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_NewTensor( nType AS LONG, pDims AS LONG, nDims AS LONG, pData AS LONG, nLength AS LONG, pDeallocator AS LONG,;
                           pDeallocatorArgs AS LONG ) AS LONG LIB hDLL
                           
DLL FUNCTION TF_AllocateTensor( nType AS LONG, pDims AS LONG, nDims AS LONG, nLegth AS LONG ) AS LONG LIB hDLL
                           
DLL FUNCTION TF_StringEncodedSize( nLength AS LONG ) AS LONG LIB hDLL    

DLL FUNCTION TF_TensorData( hTensor AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_StringEncode( cString AS LPSTR, nLength AS LONG, pDest AS LONG, nDestLength AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_SessionRun( hSession AS LONG, hRunOptions AS LONG, hInputs AS LONG, @hInputValues AS LONG, nInputs AS LONG,;
                            hOutputs AS LONG, @hOutputValues AS LONG, nOutputs AS LONG, @hTargetOperations AS LONG, nTargets AS LONG,;
                            hRunMetadata AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_Message( hStatus AS LONG ) AS LPSTR LIB hDLL

DLL FUNCTION TF_NewOperation( hGraph AS LONG, cOperationType AS LPSTR, cOperationName AS LPSTR ) AS LONG LIB hDLL

DLL FUNCTION TF_SetAttrTensor( hOperationDescription AS LONG, cAttributeName AS LPSTR, hTensor AS LONG, hStatus AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_TensorType( hTensor AS LONG ) AS LONG LIB hDLL

DLL FUNCTION TF_SetAttrType( hOperationDescription AS LONG, cAttributeName AS LPSTR, nDataType AS LONG ) AS VOID LIB hDLL

DLL FUNCTION TF_FinishOperation( hOperationDescription AS LONG, hStatus AS LONG ) AS LONG LIB hDLL

#pragma BEGINDUMP

#include <hbapi.h>

typedef struct TF_Output {
  void * oper;
  int index;
} TF_Output;

HB_FUNC( TF_OUTPUT )
{
   TF_Output * hOutput = ( TF_Output * ) hb_xgrab( sizeof( TF_Output ) );
   
   hOutput->oper = ( void * ) hb_parnll( 1 );
   hOutput->index = hb_parnl( 2 );
   
   hb_retnll( ( HB_LONGLONG ) hOutput );
}  

#pragma ENDDUMP

[Antonio Linares]

Building a C++ (using C_API) example:

c:\bcc7164\bin\bcc64 tf.cpp -Ic:\bcc7164\include\windows\crtl -Ic:\bcc7164\include\dinkumware64 -Ic:\bcc7164\include\dinkumware -Ic:\bcc7164\include\windows\sdk -Lc:\bcc7164\lib tensorflow.a

To build the TensorFlow import library do:
c:\bcc7164\bin\mkexp tensorflow.a tensorflow.dll

example copied from here:
https://github.com/tensorflow/tensorflow/issues/5106

tf.cpp

Code: Select all  Expand view

#include <string.h>
#include <iostream.h>
#include "c_api.h"

int main() {

  // creating a TF_Graph
  TF_Graph* graph = TF_NewGraph();

  // creating a "Variable" operation
  TF_OperationDescription* opDesc = TF_NewOperation(graph, "Variable", "w");
  const long long dims[2] = {2, 2};
  TF_SetAttrShape(opDesc, "shape", dims, 2);
  TF_SetAttrType(opDesc, "dtype", TF_DOUBLE);

  TF_Status* status = TF_NewStatus();
  TF_Operation* w = TF_FinishOperation(opDesc, status);
  std::string finish_message = std::string(TF_Message(status));

  TF_Output w_port = {w, 0};
  int w_num_dims = TF_GraphGetTensorNumDims(graph, w_port, status);
  std::string num_dims_message = std::string(TF_Message(status));

  // std::cout << finish_message << '\n';
  // std::cout << w_num_dims << '\n';
  // std::cout << num_dims_message << '\n';

  TF_DeleteGraph(graph);
  TF_DeleteStatus(status);

  return 0;
}

[Antonio Linares]

Asking for help on StackOverflow

https://stackoverflow.com/questions/44378764/hello-tensorflow-using-the-c-api

[Antonio Linares]

The help arrived and also a bug discovered and fixed

The C code is already working so we are ready to fix the Harbour implementation too