1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
// Copyright 2017 The TensorFlow Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tensorflow
import (
"runtime"
"unsafe"
)
// #include <stdlib.h>
// #include "tensorflow/c/c_api.h"
import "C"
// SavedModel represents the contents of loaded SavedModel.
// TODO(jhseu): Add and document metagraphdef when we pregenerate protobufs.
type SavedModel struct {
Session *Session
Graph *Graph
}
// LoadSavedModel creates a new SavedModel from a model previously
// exported to a directory on disk.
//
// Exported models contain a set of graphs and, optionally, variable values.
// Tags in the model identify a single graph. LoadSavedModel initializes a
// session with the identified graph and with variables initialized to from the
// checkpoints on disk.
//
// The tensorflow package currently does not have the ability to export a model
// to a directory from Go. This function thus currently targets loading models
// exported in other languages, such as using tf.saved_model.builder in Python.
// See:
// https://www.tensorflow.org/code/tensorflow/python/saved_model/
func LoadSavedModel(exportDir string, tags []string, options *SessionOptions) (*SavedModel, error) {
status := newStatus()
cOpt, doneOpt, err := options.c()
defer doneOpt()
if err != nil {
return nil, err
}
cExportDir := C.CString(exportDir)
cTags := make([]*C.char, len(tags))
for i := range tags {
cTags[i] = C.CString(tags[i])
}
graph := NewGraph()
// TODO(jhseu): Add support for run_options and meta_graph_def.
cSess := C.TF_LoadSessionFromSavedModel(cOpt, nil, cExportDir, (**C.char)(unsafe.Pointer(&cTags[0])), C.int(len(cTags)), graph.c, nil, status.c)
for i := range cTags {
C.free(unsafe.Pointer(cTags[i]))
}
C.free(unsafe.Pointer(cExportDir))
if err := status.Err(); err != nil {
return nil, err
}
s := &Session{c: cSess}
runtime.SetFinalizer(s, func(s *Session) { s.Close() })
return &SavedModel{Session: s, Graph: graph}, nil
}
|
