1/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#ifndef TENSORFLOW_CORE_KERNELS_FUNCTION_OPS_H_
17#define TENSORFLOW_CORE_KERNELS_FUNCTION_OPS_H_
18
19#include "tensorflow/core/framework/full_type_util.h"
20#include "tensorflow/core/framework/function.h"
21#include "tensorflow/core/framework/op_kernel.h"
22
23namespace tensorflow {
24
25static const char* const kArgOp = FunctionLibraryDefinition::kArgOp;
26static const char* const kDeviceArgOp = FunctionLibraryDefinition::kDeviceArgOp;
27static const char* const kRetOp = FunctionLibraryDefinition::kRetOp;
28static const char* const kDeviceRetOp = FunctionLibraryDefinition::kDeviceRetOp;
29
30class ArgOp : public OpKernel {
31 public:
32 explicit ArgOp(OpKernelConstruction* ctx);
33
34 void Compute(OpKernelContext* ctx) override;
35
36 bool IsExpensive() override { return false; }
37
38 private:
39 int index_;
40 DataType dtype_;
41
42 TF_DISALLOW_COPY_AND_ASSIGN(ArgOp);
43};
44
45class RetvalOp : public OpKernel {
46 public:
47 explicit RetvalOp(OpKernelConstruction* ctx);
48
49 void Compute(OpKernelContext* ctx) override;
50
51 bool IsExpensive() override { return false; }
52
53 private:
54 int index_;
55 DataType dtype_;
56
57 TF_DISALLOW_COPY_AND_ASSIGN(RetvalOp);
58};
59
60class RemoteCallOp : public AsyncOpKernel {
61 public:
62 explicit RemoteCallOp(OpKernelConstruction* ctx);
63
64 ~RemoteCallOp() override {}
65
66 void ComputeAsync(OpKernelContext* ctx, DoneCallback done) override;
67
68 string TraceString(const OpKernelContext& ctx, bool verbose) const override;
69
70 private:
71 NameAttrList func_;
72 DataTypeVector input_dtypes_;
73 DataTypeVector output_dtypes_;
74 // Note that in the future if all RemoteCall ops have full type
75 // information, the kernel will not need access to the "Tout" Attr and
76 // return_type_ will replace output_dtypes_.
77 FullTypeDef return_type_;
78
79 mutex mu_;
80 typedef std::pair<string, FunctionLibraryRuntime*> FunctionTarget;
81 std::map<FunctionTarget, FunctionLibraryRuntime::Handle> handle_cache_
82 TF_GUARDED_BY(mu_);
83
84 TF_DISALLOW_COPY_AND_ASSIGN(RemoteCallOp);
85};
86
87} // namespace tensorflow
88#endif // TENSORFLOW_CORE_KERNELS_FUNCTION_OPS_H_
89