text: #include "conv_op_shared.h"
  #include "caffe2/core/context.h"
  #include "caffe2/core/flags.h"
  #include "caffe2/core/workspace.h"
  
  C10_DEFINE_bool(
      caffe2_force_shared_col_buffer,
      false,
      "Always use the shared col buffer");
  
  namespace caffe2 {
  
  template <>
  void createSharedBuffer<CPUContext>(Workspace* ws) {
    auto* mutexPtr = ws->CreateBlob("__CAFFE2_SHARED_CONV_BUFFER_CPU_MUTEX__")
                         ->GetMutable<std::unique_ptr<std::mutex>>();
    // NOLINTNEXTLINE(modernize-make-unique)
    mutexPtr->reset(new std::mutex());
    ws->CreateBlob("__CAFFE2_SHARED_CONV_BUFFER_CPU__");
  }
  
  template <>
  void runWithSharedBuffer<CPUContext>(
      Workspace* ws,
      std::function<void(Tensor* buffer)> f) {
    auto* mutexBlob = ws->GetBlob("__CAFFE2_SHARED_CONV_BUFFER_CPU_MUTEX__");
    CAFFE_ENFORCE(mutexBlob, "Must call createSharedBuffer() first");
  
    auto* mutexPtr = mutexBlob->GetMutable<std::unique_ptr<std::mutex>>();
    std::lock_guard<std::mutex> g(**mutexPtr);
    auto* buffer = BlobGetMutableTensor(
        ws->GetBlob("__CAFFE2_SHARED_CONV_BUFFER_CPU__"), CPU);
    f(buffer);
  }
  }
  