Merge pull request #3289 from dzhwinter/fix_context

"change device context to pointer"

paddle/framework/operator.cc

@@ -22,14 +22,14 @@ namespace framework {
 template <>
 Eigen::DefaultDevice& ExecutionContext::GetEigenDevice<
     platform::CPUPlace, Eigen::DefaultDevice>() const {
-  return *device_context_.get_eigen_device<Eigen::DefaultDevice>();
+  return *device_context_->get_eigen_device<Eigen::DefaultDevice>();
 }
 
 #ifndef PADDLE_ONLY_CPU
 template <>
 Eigen::GpuDevice&
 ExecutionContext::GetEigenDevice<platform::GPUPlace, Eigen::GpuDevice>() const {
-  return *device_context_.get_eigen_device<Eigen::GpuDevice>();
+  return *device_context_->get_eigen_device<Eigen::GpuDevice>();
 }
 #endif
 

paddle/framework/operator.h

@@ -252,7 +252,7 @@ struct EigenDeviceConverter<platform::GPUPlace> {
 class ExecutionContext : public OperatorContext {
  public:
   ExecutionContext(const OperatorBase* op, const Scope& scope,
-                   const platform::DeviceContext& device_context)
+                   const platform::DeviceContext* device_context)
       : OperatorContext(op, scope), device_context_(device_context) {}
 
   template <typename PlaceType,
@@ -260,9 +260,9 @@ class ExecutionContext : public OperatorContext {
                 typename EigenDeviceConverter<PlaceType>::EigenDeviceType>
   DeviceType& GetEigenDevice() const;
 
-  platform::Place GetPlace() const { return device_context_.GetPlace(); }
+  platform::Place GetPlace() const { return device_context_->GetPlace(); }
 
-  const platform::DeviceContext& device_context_;
+  const platform::DeviceContext* device_context_;
 };
 
 class OpKernel {
@@ -311,7 +311,7 @@ class OperatorWithKernel : public OperatorBase {
   void Run(const Scope& scope,
            const platform::DeviceContext& dev_ctx) const final {
     auto& opKernel = AllOpKernels().at(type_).at(OpKernelKey(dev_ctx));
-    opKernel->Compute(ExecutionContext(this, scope, dev_ctx));
+    opKernel->Compute(ExecutionContext(this, scope, &dev_ctx));
   }
 
   static std::unordered_map<std::string /* op_type */, OpKernelMap>&