add executor class and interface

paddle/framework/CMakeLists.txt

@@ -43,3 +43,5 @@ add_custom_command(TARGET framework_py_proto POST_BUILD
 
 cc_library(backward SRCS backward.cc DEPS net_op)
 cc_test(backward_test SRCS backward_test.cc DEPS backward recurrent_op device_context)
+
+cc_library(executor SRCS executor.cc DEPS device_context framework_proto)

paddle/framework/executor.cc

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+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. */
+
+#include "paddle/framework/executor.h"
+
+#include "paddle/platform/device_context.h"
+
+namespace paddle {
+namespace framework {
+
+class LinearListView;
+class GraphView;
+
+// Immutable view of a ProgramDesc organized for efficient execution.
+class ProgramDescView {
+ public:
+  virtual ~ProgramDescView() {}
+  virtual void Initialize(const ProgramDesc*) = 0;
+  static ProgramDescView* Create(bool is_linear);
+};
+
+class LinearListView : public ProgramDescView {
+ public:
+  void Initialize(const ProgramDesc*) override;
+};
+
+class GraphView : public ProgramDescView {
+ public:
+  void Initialize(const ProgramDesc*) override;
+};
+
+static ProgramDescView* Create(bool is_linear) {
+  if (is_linear) {
+    return new LinearListView();
+  } else {
+    return new GraphView();
+  }
+}
+
+void LinearListView::Initialize(const ProgramDesc*) {
+  // get a LinearView of ProgramDesc
+}
+
+void GraphView::Initialize(const ProgramDesc*) {
+  // get a GraphView of ProgramDesc
+}
+
+class ExecutorImpl : public Executor {
+ public:
+  ExecutorImpl(const platform::DeviceContext* ctx, const ProgramDesc* pdesc,
+               bool is_linear)
+      : device_context_(ctx),
+        program_desc_(pdesc),
+        view_(ProgramDescView::Create(is_linear)) {}
+
+  virtual ~ExecutorImpl() {
+    if (view_) delete view_;
+  }
+
+  void Run() override;
+
+  void Initialize();
+
+ private:
+  const platform::DeviceContext* device_context_;
+  const ProgramDesc* program_desc_;
+  ProgramDescView* view_;
+};
+
+static Executor* NewLocalExecutor(const platform::Place& place,
+                                  const ProgramDesc& pdesc, bool is_linear) {
+  platform::DeviceContext* device_context = nullptr;
+  if (platform::is_cpu_place(place)) {
+    device_context =
+        new platform::CPUDeviceContext(boost::get<platform::CPUPlace>(place));
+  }
+#ifndef PADDLE_ONLY_CPU
+  else if {
+    device_context =
+        new platform::CUDADeviceContext(boost::get<platform::GPUPlace>(place));
+  }
+#endif
+  return new ExecutorImpl(device_context, &pdesc, is_linear);
+}
+
+void ExecutorImpl::Run() {
+  // operators running
+  device_context_->Wait();
+}
+
+void ExecutorImpl::Initialize() {
+  // Initialize the ProgramDescView
+  view_->Initialize(program_desc_);
+}
+
+}  // namespace framework
+}  // namespace paddle

paddle/framework/executor.h

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+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. */
+
+#pragma once
+
+#include "paddle/framework/framework.pb.h"
+#include "paddle/platform/place.h"
+
+namespace paddle {
+namespace framework {
+
+class Executor {
+ public:
+  virtual ~Executor() {}
+  virtual void Run() = 0;
+};
+
+static Executor* NewLocalExecutor(const platform::Place&, const ProgramDesc&);
+
+}  // namespace framework
+}  // namespace paddle

paddle/framework/executor_test.cc

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+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. */
+
+#include "paddle/framework/executor.h"
+#include "gtest/gtest.h"
+
+TEST(Executor, Init) {}
\ No newline at end of file