add scope

paddle/framework/CMakeLists.txt

@@ -44,5 +44,5 @@ 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)
+cc_library(executor SRCS executor.cc DEPS device_context scope framework_proto)
 cc_test(executor_test SRCS executor_test.cc DEPS executor)

paddle/framework/executor.cc

@@ -14,6 +14,7 @@ limitations under the License. */
 
 #include "paddle/framework/executor.h"
 #include <memory>
+#include "paddle/framework/scope.h"
 #include "paddle/platform/device_context.h"
 
 namespace paddle {
@@ -58,9 +59,10 @@ void GraphView::Initialize(const ProgramDesc*) {
 
 class ExecutorImpl : public Executor {
  public:
-  ExecutorImpl(const platform::DeviceContext* ctx, const ProgramDesc* pdesc,
-               bool is_linear)
-      : device_context_(ctx),
+  ExecutorImpl(Scope* scope, const platform::DeviceContext* ctx,
+               const ProgramDesc* pdesc, bool is_linear)
+      : scope_(scope),
+        device_context_(ctx),
         program_desc_(pdesc),
         view_(ProgramDescView::Create(is_linear)) {}
 
@@ -73,6 +75,7 @@ class ExecutorImpl : public Executor {
   void Initialize();
 
  private:
+  Scope* scope_;
   const platform::DeviceContext* device_context_;
   const ProgramDesc* program_desc_;
   ProgramDescView* view_;
@@ -97,6 +100,12 @@ platform::CUDADeviceContext* GetCUDADeviceContext() {
 }
 #endif
 
+framework::Scope* GetScope() {
+  static std::unique_ptr<framework::Scope> g_scope =
+      make_unique<framework::Scope>();
+  return g_scope.get();
+}
+
 Executor* NewLocalExecutor(const platform::Place& place,
                            const ProgramDesc& pdesc, bool is_linear) {
   platform::DeviceContext* device_context = nullptr;
@@ -110,11 +119,12 @@ Executor* NewLocalExecutor(const platform::Place& place,
     PADDLE_THROW("'GPUPlace' is not supported in CPU only device.");
   }
 #endif
-  return new ExecutorImpl(device_context, &pdesc, is_linear);
+  return new ExecutorImpl(GetScope(), device_context, &pdesc, is_linear);
 }
 
 void ExecutorImpl::Run() {
   // operators running
+  scope_->NewVar();
   device_context_->Wait();
 }