add namespace to all C code

Reviewed By: rbgirshick

Differential Revision: D17917015

fbshipit-source-id: a5faa5c534f16c3f5b155064e9df48ad27c21f69

Author: ppwwyyxx

detectron2/layers/csrc/ROIAlign/ROIAlign.h

@@ -2,6 +2,8 @@
 #pragma once
 #include <torch/extension.h>
 
+namespace detectron2 {
+
 at::Tensor ROIAlign_forward_cpu(
     const at::Tensor& input,
     const at::Tensor& rois,
@@ -124,3 +126,5 @@ inline at::Tensor ROIAlign_backward(
       sampling_ratio,
       aligned);
 }
+
+} // namespace detectron2

detectron2/layers/csrc/ROIAlign/ROIAlign_cpu.cpp

@@ -2,6 +2,8 @@
 #include <ATen/TensorUtils.h>
 #include "ROIAlign.h"
 
+namespace {
+
 // implementation taken from Caffe2
 template <typename T>
 struct PreCalc {
@@ -391,6 +393,10 @@ void ROIAlignBackward(
   } // for
 } // ROIAlignBackward
 
+} // namespace
+
+namespace detectron2 {
+
 at::Tensor ROIAlign_forward_cpu(
     const at::Tensor& input,
     const at::Tensor& rois,
@@ -493,3 +499,5 @@ at::Tensor ROIAlign_backward_cpu(
   });
   return grad_input;
 }
+
+} // namespace detectron2

detectron2/layers/csrc/ROIAlign/ROIAlign_cuda.cu

@@ -305,6 +305,8 @@ __global__ void RoIAlignBackwardFeature(
   } // CUDA_1D_KERNEL_LOOP
 } // RoIAlignBackward
 
+namespace detectron2 {
+
 at::Tensor ROIAlign_forward_cuda(
     const at::Tensor& input,
     const at::Tensor& rois,
@@ -416,3 +418,5 @@ at::Tensor ROIAlign_backward_cuda(
   AT_CUDA_CHECK(cudaGetLastError());
   return grad_input;
 }
+
+} // namespace detectron2

detectron2/layers/csrc/box_iou_rotated/box_iou_rotated_utils.h

@@ -308,6 +308,8 @@ HOST_DEVICE_INLINE T rotated_boxes_intersection(
   return polygon_area<T>(orderedPts, num_convex);
 }
 
+} // namespace
+
 template <typename T>
 HOST_DEVICE_INLINE T
 single_box_iou_rotated(T const* const box1_raw, T const* const box2_raw) {
@@ -337,6 +339,4 @@ single_box_iou_rotated(T const* const box1_raw, T const* const box2_raw) {
   return iou;
 }
 
-} // namespace
-
 } // namespace detectron2

detectron2/layers/csrc/deformable/deform_conv.h

@@ -2,6 +2,8 @@
 #pragma once
 #include <torch/extension.h>
 
+namespace detectron2 {
+
 #ifdef WITH_CUDA
 int deform_conv_forward_cuda(
     at::Tensor input,
@@ -371,3 +373,5 @@ inline void modulated_deform_conv_backward(
   }
   AT_ERROR("Not implemented on the CPU");
 }
+
+} // namespace detectron2

detectron2/layers/csrc/deformable/deform_conv_cuda.cu

@@ -15,6 +15,8 @@
 #include <cmath>
 #include <vector>
 
+namespace detectron2 {
+
 void deformable_im2col(
     const at::Tensor data_im,
     const at::Tensor data_offset,
@@ -1124,3 +1126,5 @@ void modulated_deform_conv_cuda_backward(
                                   grad_output.size(3),
                                   grad_output.size(4)});
 }
+
+} // namespace detectron2