From 783c52edeb3c676937dbb97ed0d40958015050d6 Mon Sep 17 00:00:00 2001
From: Jonathan Hseu <jhseu@google.com>
Date: Tue, 23 Aug 2016 09:01:25 -0800
Subject: Initial version of the Go API. The API is subject to change.

Remaining work to do:
- Generated ops.
- Generated protocol buffers.
- A few calls requiring protocol buffers aren't in this change.
Change: 131066649
---
 tensorflow/go/operation.go | 82 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 tensorflow/go/operation.go

(limited to 'tensorflow/go/operation.go')

diff --git a/tensorflow/go/operation.go b/tensorflow/go/operation.go
new file mode 100644
index 0000000000..19eb1a5816
--- /dev/null
+++ b/tensorflow/go/operation.go
@@ -0,0 +1,82 @@
+// Copyright 2016 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
+
+// #include <stdlib.h>
+// #include "tensorflow/c/c_api.h"
+import "C"
+import "unsafe"
+
+// Operation that has been added to the graph.
+type Operation struct {
+	c *C.TF_Operation
+}
+
+// Port represents a specific input or output of an operation, e.g. to specify
+// the specific output to pass as an input to a new op.
+//
+// Note the difference in naming convention: Port corresponds to Tensor/Output
+// in the Python API.
+type Port struct {
+	Op    *Operation
+	Index int
+}
+
+func (p *Port) c() C.TF_Port {
+	return C.TF_Port{oper: p.Op.c, index: C.int(p.Index)}
+}
+
+// opBuilder is for use by the generated op code to create new Operations.
+// Build() must be called for any in-progress Operation, or else we leak.
+type opBuilder struct {
+	c *C.TF_OperationDescription
+}
+
+func newOpBuilder(g *Graph, typ string, name string) *opBuilder {
+	opType := C.CString(typ)
+	opName := C.CString(name)
+	b := &opBuilder{c: C.TF_NewOperation(g.c, opType, opName)}
+	C.free(unsafe.Pointer(opType))
+	C.free(unsafe.Pointer(opName))
+	return b
+}
+
+func (b *opBuilder) SetAttrTensor(name string, t *Tensor) error {
+	status := newStatus()
+	attrName := C.CString(name)
+	C.TF_SetAttrTensor(b.c, attrName, t.c(), status.c)
+	C.free(unsafe.Pointer(attrName))
+	return status.Err()
+}
+
+func (b *opBuilder) SetAttrType(name string, typ DataType) {
+	attrName := C.CString(name)
+	C.TF_SetAttrType(b.c, attrName, C.TF_DataType(typ))
+	C.free(unsafe.Pointer(attrName))
+}
+
+func (b *opBuilder) AddInput(port Port) {
+	C.TF_AddInput(b.c, port.c())
+}
+
+func (b *opBuilder) Build() (*Operation, error) {
+	status := newStatus()
+	op := &Operation{c: C.TF_FinishOperation(b.c, status.c)}
+	if err := status.Err(); err != nil {
+		return nil, err
+	}
+	b.c = nil
+	return op, nil
+}
-- 
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