EmptyTensor.h

#pragma once
#include <ATen/core/TensorBase.h>

namespace at {
namespace detail {

inline void check_size_nonnegative(IntArrayRef size) {
  for (auto x: size) {
    TORCH_CHECK(x >= 0, "Trying to create tensor with negative dimension ", x, ": ", size);
  }
}

TORCH_API size_t computeStorageNbytesContiguous(
    IntArrayRef sizes, size_t itemsize, size_t storage_offset=0);
TORCH_API size_t computeStorageNbytes(
    IntArrayRef sizes, IntArrayRef strides,
    size_t itemsize, size_t storage_offset=0);

TORCH_API TensorBase empty_generic(
    IntArrayRef size,
    c10::Allocator* allocator,
    c10::DispatchKeySet ks,
    ScalarType scalar_type,
    c10::optional<c10::MemoryFormat> memory_format_opt);

TORCH_API TensorBase empty_strided_generic(
    IntArrayRef size,
    IntArrayRef stride,
    c10::Allocator* allocator,
    c10::DispatchKeySet ks,
    ScalarType scalar_type);

TORCH_API TensorBase empty_cpu(
    IntArrayRef size,
    ScalarType dtype,
    bool pin_memory=false,
    c10::optional<c10::MemoryFormat> memory_format_opt=c10::nullopt);

TORCH_API TensorBase empty_cpu(
    IntArrayRef size,
    c10::optional<ScalarType> dtype_opt,
    c10::optional<Layout> layout_opt,
    c10::optional<Device> device_opt,
    c10::optional<bool> pin_memory_opt,
    c10::optional<c10::MemoryFormat> memory_format_opt);

TORCH_API TensorBase empty_cpu(
    IntArrayRef size,
    const TensorOptions &options);

TORCH_API TensorBase empty_strided_cpu(
    IntArrayRef size,
    IntArrayRef stride,
    ScalarType dtype,
    bool pin_memory=false);

TORCH_API TensorBase empty_strided_cpu(
    IntArrayRef size,
    IntArrayRef stride,
    c10::optional<ScalarType> dtype_opt,
    c10::optional<Layout> layout_opt,
    c10::optional<Device> device_opt,
    c10::optional<bool> pin_memory_opt);

TORCH_API TensorBase empty_strided_cpu(
    IntArrayRef size,
    IntArrayRef stride,
    const TensorOptions &options);

TORCH_API TensorBase empty_meta(
    IntArrayRef size,
    ScalarType dtype,
    c10::optional<c10::MemoryFormat> memory_format_opt=c10::nullopt);

TORCH_API TensorBase empty_meta(
    IntArrayRef size,
    c10::optional<ScalarType> dtype_opt,
    c10::optional<Layout> layout_opt,
    c10::optional<Device> device_opt,
    c10::optional<bool> pin_memory_opt,
    c10::optional<c10::MemoryFormat> memory_format_opt);

TORCH_API TensorBase empty_meta(
    IntArrayRef size,
    const TensorOptions &options);

TORCH_API TensorBase empty_strided_meta(
    IntArrayRef size, IntArrayRef stride, ScalarType dtype);

TORCH_API TensorBase empty_strided_meta(
    IntArrayRef size,
    IntArrayRef stride,
    c10::optional<ScalarType> dtype_opt,
    c10::optional<Layout> layout_opt,
    c10::optional<Device> device_opt,
    c10::optional<bool> pin_memory_opt);

TORCH_API TensorBase empty_strided_meta(
    IntArrayRef size,
    IntArrayRef stride,
    const TensorOptions &options);

}}  // namespace at::detail