dlpack.h

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#ifndef DLPACK_DLPACK_H_
#define DLPACK_DLPACK_H_

#ifdef __cplusplus
#define DLPACK_EXTERN_C extern "C"
#else
#define DLPACK_EXTERN_C
#endif

#define DLPACK_VERSION 010

#ifdef _WIN32
#ifdef DLPACK_EXPORTS
#define DLPACK_DLL __declspec(dllexport)
#else
#define DLPACK_DLL __declspec(dllimport)
#endif
#else
#define DLPACK_DLL
#endif

#include <stdint.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
  kDLCPU = 1,
  kDLGPU = 2,
  // kDLCPUPinned = kDLCPU | kDLGPU
  kDLCPUPinned = 3,
  kDLOpenCL = 4,
  kDLMetal = 8,
  kDLVPI = 9,
  kDLROCM = 10,
} DLDeviceType;

typedef struct {
  DLDeviceType device_type;
  int device_id;
} DLContext;

typedef enum {
  kDLInt = 0U,
  kDLUInt = 1U,
  kDLFloat = 2U,
} DLDataTypeCode;

typedef struct {
  uint8_t code;
  uint8_t bits;
  uint16_t lanes;
} DLDataType;

typedef struct {
  void* data;
  DLContext ctx;
  int ndim;
  DLDataType dtype;
  int64_t* shape;
  int64_t* strides;
  uint64_t byte_offset;
} DLTensor;

typedef struct DLManagedTensor {
  DLTensor dl_tensor;
  void * manager_ctx;
  void (*deleter)(struct DLManagedTensor * self);
} DLManagedTensor;
#ifdef __cplusplus
}  // DLPACK_EXTERN_C
#endif
#endif  // DLPACK_DLPACK_H_