[REFACTOR][FFI] Make more clear naming for C API Type codes.

This PR introduces more clear naming prefix for C API type codes
to avoid conflict with other packages.

We also removed TVMArray and TVMType to directly use DLTensor and DLDataType.

apps/extension/src/tvm_ext.cc

@@ -156,7 +156,7 @@ TVM_REGISTER_GLOBAL("tvm_ext.nd_create")
 .set_body([](TVMArgs args, TVMRetValue *rv) {
   int additional_info = args[0];
   *rv = NDSubClass(additional_info);
-  CHECK_EQ(rv->type_code(), kNDArrayContainer);
+  CHECK_EQ(rv->type_code(), kTVMNDArrayHandle);
 
 });
 

golang/src/ndarray.go

@@ -47,7 +47,7 @@ func (parray Array) nativeCPtr() (retVal uintptr) {
 }
 
 func (parray Array) nativeCopyFrom(data unsafe.Pointer, datalen int) (err error) {
-    ret := C.TVMArrayCopyFromBytes((*C.TVMArray)(unsafe.Pointer(parray.nativeCPtr())),
+    ret := C.TVMArrayCopyFromBytes((*C.DLTensor)(unsafe.Pointer(parray.nativeCPtr())),
                                    data,
                                    C.ulong(datalen))
     if ret != 0 {
@@ -65,7 +65,7 @@ func (parray Array) nativeCopyFrom(data unsafe.Pointer, datalen int) (err error)
 func (parray Array) CopyFrom(val interface{}) (err error) {
     var data unsafe.Pointer
     var datalen int
-    dtype := ((*C.TVMArray)(unsafe.Pointer(parray))).dtype
+    dtype := ((*C.DLTensor)(unsafe.Pointer(parray))).dtype
 
     switch val.(type) {
         case []int8:
@@ -126,7 +126,7 @@ func (parray Array) CopyFrom(val interface{}) (err error) {
 }
 
 func (parray Array) nativeCopyTo (data unsafe.Pointer, datalen int) (err error){
-    ret := C.TVMArrayCopyToBytes((*C.TVMArray)(unsafe.Pointer(parray.nativeCPtr())),
+    ret := C.TVMArrayCopyToBytes((*C.DLTensor)(unsafe.Pointer(parray.nativeCPtr())),
                                   unsafe.Pointer(data),
                                   C.ulong(datalen))
 
@@ -149,7 +149,7 @@ func (parray Array) AsSlice() (retVal interface{}, err error) {
     for ii := range shape {
         size *= shape[ii]
     }
-    dtype := ((*C.TVMArray)(unsafe.Pointer(parray))).dtype
+    dtype := ((*C.DLTensor)(unsafe.Pointer(parray))).dtype
 
     switch parray.GetDType() {
         case "int8":
@@ -221,13 +221,13 @@ func (parray Array) AsSlice() (retVal interface{}, err error) {
 
 // GetNdim returns the number of dimentions in Array
 func (parray Array) GetNdim() (retVal int32) {
-    retVal = int32(((*C.TVMArray)(unsafe.Pointer(parray))).ndim)
+    retVal = int32(((*C.DLTensor)(unsafe.Pointer(parray))).ndim)
     return
 }
 
 // GetShape returns the number of dimentions in Array
 func (parray Array) GetShape() (retVal []int64) {
-    shapePtr := (*C.int64_t)(((*C.TVMArray)(unsafe.Pointer(parray))).shape)
+    shapePtr := (*C.int64_t)(((*C.DLTensor)(unsafe.Pointer(parray))).shape)
     ndim := parray.GetNdim()
 
     shapeSlice := (*[1<<31] int64)(unsafe.Pointer(shapePtr))[:ndim:ndim]
@@ -238,14 +238,14 @@ func (parray Array) GetShape() (retVal []int64) {
 
 // GetDType returns the number of dimentions in Array
 func (parray Array) GetDType() (retVal string) {
-    ret := ((*C.TVMArray)(unsafe.Pointer(parray))).dtype
+    ret := ((*C.DLTensor)(unsafe.Pointer(parray))).dtype
     retVal, _ = dtypeFromTVMType(*(*pTVMType)(unsafe.Pointer(&ret)))
     return
 }
 
 // GetCtx returns the number of dimentions in Array
 func (parray Array) GetCtx() (retVal Context) {
-    ret := ((*C.TVMArray)(unsafe.Pointer(parray))).ctx
+    ret := ((*C.DLTensor)(unsafe.Pointer(parray))).ctx
     retVal = *(*Context)(unsafe.Pointer(&ret))
     return
 }
@@ -342,6 +342,6 @@ func Empty(shape []int64, args ...interface{}) (parray *Array, err error) {
 //
 // `ret` indicates the status of this api execution.
 func nativeTVMArrayFree(parray Array) (retVal int32) {
-    retVal = (int32)(C.TVMArrayFree((*C.TVMArray)(unsafe.Pointer(parray.nativeCPtr()))))
+    retVal = (int32)(C.TVMArrayFree((*C.DLTensor)(unsafe.Pointer(parray.nativeCPtr()))))
     return
 }

golang/src/value.go

@@ -33,38 +33,38 @@ import (
     "unsafe"
 )
 
-// KHandle is golang type code for TVM enum kHandle.
-var KHandle                 = int32(C.kHandle)
-// KNull is golang type code for TVM kNull.
-var KNull                   = int32(C.kNull)
-// KTVMType is golang type code for TVM kTVMType.
-var KTVMType                = int32(C.kTVMType)
+// KHandle is golang type code for TVM enum kTVMOpaqueHandle.
+var KHandle                 = int32(C.kTVMOpaqueHandle)
+// KNull is golang type code for TVM kTVMNullptr.
+var KNull                   = int32(C.kTVMNullptr)
+// KTVMType is golang type code for TVM kTVMDataType.
+var KTVMType                = int32(C.kTVMDataType)
 // KTVMContext is golang type code for TVM kTVMContext.
 var KTVMContext             = int32(C.kTVMContext)
-// KArrayHandle is golang type code for TVM kArrayHandle.
-var KArrayHandle            = int32(C.kArrayHandle)
-// KObjectHandle is golang type code for TVM kObjectHandle.
-var KObjectHandle             = int32(C.kObjectHandle)
-// KModuleHandle is gonag type code for TVM kModuleHandle.
-var KModuleHandle           = int32(C.kModuleHandle)
-// KFuncHandle is gonalg type code for TVM kFuncHandle.
-var KFuncHandle             = int32(C.kFuncHandle)
-// KStr is golang type code for TVM kStr.
-var KStr                    = int32(C.kStr)
-// KBytes is golang type code for TVM kBytes.
-var KBytes                  = int32(C.kBytes)
-// KNDArrayContainer is golang typecode for kNDArrayContainer.
-var KNDArrayContainer       = int32(C.kNDArrayContainer)
-// KExtBegin is golang enum corresponding to TVM kExtBegin.
-var KExtBegin               = int32(C.kExtBegin)
+// KArrayHandle is golang type code for TVM kTVMDLTensorHandle.
+var KArrayHandle            = int32(C.kTVMDLTensorHandle)
+// KObjectHandle is golang type code for TVM kTVMObjectHandle.
+var KObjectHandle             = int32(C.kTVMObjectHandle)
+// KModuleHandle is gonag type code for TVM kTVMModuleHandle.
+var KModuleHandle           = int32(C.kTVMModuleHandle)
+// KFuncHandle is gonalg type code for TVM kTVMPackedFuncHandle.
+var KFuncHandle             = int32(C.kTVMPackedFuncHandle)
+// KStr is golang type code for TVM kTVMStr.
+var KStr                    = int32(C.kTVMStr)
+// KBytes is golang type code for TVM kTVMBytes.
+var KBytes                  = int32(C.kTVMBytes)
+// KNDArrayContainer is golang typecode for kTVMNDArrayHandle.
+var KNDArrayContainer       = int32(C.kTVMNDArrayHandle)
+// KExtBegin is golang enum corresponding to TVM kTVMExtBegin.
+var KExtBegin               = int32(C.kTVMExtBegin)
 // KNNVMFirst is golang enum corresponding to TVM kNNVMFirst.
-var KNNVMFirst              = int32(C.kNNVMFirst)
+var KNNVMFirst              = int32(C.kTVMNNVMFirst)
 // KNNVMLast is golang enum corresponding to TVM kNNVMLast.
-var KNNVMLast               = int32(C.kNNVMLast)
+var KNNVMLast               = int32(C.kTVMNNVMLast)
 // KExtReserveEnd is golang enum corresponding to TVM kExtReserveEnd.
-var KExtReserveEnd          = int32(C.kExtReserveEnd)
+var KExtReserveEnd          = int32(C.kTVMExtReserveEnd)
 // KExtEnd is golang enum corresponding to TVM kExtEnd.
-var KExtEnd                 = int32(C.kExtEnd)
+var KExtEnd                 = int32(C.kTVMExtEnd)
 // KDLInt is golang type code for TVM kDLInt.
 var KDLInt                  = int32(C.kDLInt)
 // KDLUInt is golang type code for TVM kDLUInt.

include/tvm/expr_operator.h

@@ -682,7 +682,7 @@ inline PrimExpr MakeConstScalar(DataType t, ValueType value) {
   // datatypes lowering pass, we will lower the value to its true representation in the format
   // specified by the datatype.
   // TODO(gus) when do we need to start worrying about doubles not being precise enough?
-  if (static_cast<uint8_t>(t.code()) >= static_cast<uint8_t>(kCustomBegin)) {
+  if (static_cast<uint8_t>(t.code()) >= static_cast<uint8_t>(kTVMCustomBegin)) {
     return FloatImm(t, static_cast<double>(value));
   }
   LOG(FATAL) << "cannot make const for type " << t;

include/tvm/ir/attrs.h

@@ -88,7 +88,7 @@ inline TObjectRef NullValue() {
 
 template<>
 inline DataType NullValue<DataType>() {
-  return DataType(kHandle, 0, 0);
+  return DataType(DataType::kHandle, 0, 0);
 }
 
 /*! \brief Error thrown during attribute checking. */
@@ -492,7 +492,7 @@ inline void SetIntValue(T* ptr, const TVMArgValue& val) {
 
 template<>
 inline void SetValue<std::string>(std::string* ptr, const TVMArgValue& val) {
-  if (val.type_code() == kStr) {
+  if (val.type_code() == kTVMStr) {
     *ptr = val.operator std::string();
   } else {
     LOG(FATAL) << "Expect str";
@@ -762,7 +762,7 @@ class AttrsNode : public BaseAttrsNode {
       // linear search.
       auto ffind = [&args](const char* key, runtime::TVMArgValue* val) {
         for (int i = 0; i < args.size(); i += 2) {
-          CHECK_EQ(args.type_codes[i], kStr);
+          CHECK_EQ(args.type_codes[i], kTVMStr);
           if (!std::strcmp(key, args.values[i].v_str)) {
             *val = args[i + 1];
             return true;
@@ -777,7 +777,7 @@ class AttrsNode : public BaseAttrsNode {
       // construct a map then do lookup.
       std::unordered_map<std::string, runtime::TVMArgValue> kwargs;
       for (int i = 0; i < args.size(); i += 2) {
-        CHECK_EQ(args.type_codes[i], kStr);
+        CHECK_EQ(args.type_codes[i], kTVMStr);
         kwargs[args[i].operator std::string()] = args[i + 1];
       }
       auto ffind = [&kwargs](const char *key, runtime::TVMArgValue* val) {

include/tvm/packed_func_ext.h

@@ -101,7 +101,7 @@ struct ObjectTypeChecker<Map<K, V> > {
 
 // extensions for tvm arg value
 inline TVMPODValue_::operator tvm::PrimExpr() const {
-  if (type_code_ == kNull) return PrimExpr();
+  if (type_code_ == kTVMNullptr) return PrimExpr();
   if (type_code_ == kDLInt) {
     CHECK_LE(value_.v_int64, std::numeric_limits<int>::max());
     CHECK_GE(value_.v_int64, std::numeric_limits<int>::min());
@@ -111,7 +111,7 @@ inline TVMPODValue_::operator tvm::PrimExpr() const {
     return PrimExpr(static_cast<float>(value_.v_float64));
   }
 
-  TVM_CHECK_TYPE_CODE(type_code_, kObjectHandle);
+  TVM_CHECK_TYPE_CODE(type_code_, kTVMObjectHandle);
   Object* ptr = static_cast<Object*>(value_.v_handle);
 
   if (ptr->IsInstance<IterVarNode>()) {
@@ -127,13 +127,13 @@ inline TVMPODValue_::operator tvm::PrimExpr() const {
 }
 
 inline TVMPODValue_::operator tvm::Integer() const {
-  if (type_code_ == kNull) return Integer();
+  if (type_code_ == kTVMNullptr) return Integer();
   if (type_code_ == kDLInt) {
     CHECK_LE(value_.v_int64, std::numeric_limits<int>::max());
     CHECK_GE(value_.v_int64, std::numeric_limits<int>::min());
     return Integer(static_cast<int>(value_.v_int64));
   }
-  TVM_CHECK_TYPE_CODE(type_code_, kObjectHandle);
+  TVM_CHECK_TYPE_CODE(type_code_, kTVMObjectHandle);
   Object* ptr = static_cast<Object*>(value_.v_handle);
   CHECK(ObjectTypeChecker<Integer>::Check(ptr))
       << "Expect type " << ObjectTypeChecker<PrimExpr>::TypeName()

include/tvm/runtime/c_runtime_api.h

@@ -86,62 +86,44 @@ typedef enum {
 } TVMDeviceExtType;
 
 /*!
- * \brief The type code in TVMType
- * \note TVMType is used in two places.
+ * \brief The type code in used in the TVM FFI.
  */
 typedef enum {
   // The type code of other types are compatible with DLPack.
   // The next few fields are extension types
   // that is used by TVM API calls.
-  kHandle = 3U,
-  kNull = 4U,
-  kTVMType = 5U,
+  kTVMOpaqueHandle = 3U,
+  kTVMNullptr = 4U,
+  kTVMDataType = 5U,
   kTVMContext = 6U,
-  kArrayHandle = 7U,
-  kObjectHandle = 8U,
-  kModuleHandle = 9U,
-  kFuncHandle = 10U,
-  kStr = 11U,
-  kBytes = 12U,
-  kNDArrayContainer = 13U,
+  kTVMDLTensorHandle = 7U,
+  kTVMObjectHandle = 8U,
+  kTVMModuleHandle = 9U,
+  kTVMPackedFuncHandle = 10U,
+  kTVMStr = 11U,
+  kTVMBytes = 12U,
+  kTVMNDArrayHandle = 13U,
   // Extension codes for other frameworks to integrate TVM PackedFunc.
   // To make sure each framework's id do not conflict, use first and
   // last sections to mark ranges.
   // Open an issue at the repo if you need a section of code.
-  kExtBegin = 15U,
-  kNNVMFirst = 16U,
-  kNNVMLast = 20U,
+  kTVMExtBegin = 15U,
+  kTVMNNVMFirst = 16U,
+  kTVMNNVMLast = 20U,
   // The following section of code is used for non-reserved types.
-  kExtReserveEnd = 64U,
-  kExtEnd = 128U,
+  kTVMExtReserveEnd = 64U,
+  kTVMExtEnd = 128U,
   // The rest of the space is used for custom, user-supplied datatypes
-  kCustomBegin = 129U,
+  kTVMCustomBegin = 129U,
 } TVMTypeCode;
 
-/*!
- * \brief The data type used in TVM Runtime.
- *
- *  Examples
- *   - float: type_code = 2, bits = 32, lanes=1
- *   - float4(vectorized 4 float): type_code = 2, bits = 32, lanes=4
- *   - int8: type_code = 0, bits = 8, lanes=1
- *
- * \note Arguments TVM API function always takes bits=64 and lanes=1
- */
-typedef DLDataType TVMType;
-
 /*!
  * \brief The Device information, abstract away common device types.
  */
 typedef DLContext TVMContext;
 
-/*!
- * \brief The tensor array structure to TVM API.
- */
-typedef DLTensor TVMArray;
-
 /*! \brief the array handle */
-typedef TVMArray* TVMArrayHandle;
+typedef DLTensor* TVMArrayHandle;
 
 /*!
  * \brief Union type of values
@@ -152,13 +134,13 @@ typedef union {
   double v_float64;
   void* v_handle;
   const char* v_str;
-  TVMType v_type;
+  DLDataType v_type;
   TVMContext v_ctx;
 } TVMValue;
 
 /*!
  * \brief Byte array type used to pass in byte array
- *  When kBytes is used as data type.
+ *  When kTVMBytes is used as data type.
  */
 typedef struct {
   const char* data;

include/tvm/runtime/data_type.h

@@ -44,7 +44,7 @@ class DataType {
     kInt = kDLInt,
     kUInt = kDLUInt,
     kFloat = kDLFloat,
-    kHandle = TVMTypeCode::kHandle,
+    kHandle = TVMTypeCode::kTVMOpaqueHandle,
   };
   /*! \brief default constructor */
   DataType() {}

include/tvm/runtime/device_api.h

@@ -88,7 +88,7 @@ class TVM_DLL DeviceAPI {
   virtual void* AllocDataSpace(TVMContext ctx,
                                size_t nbytes,
                                size_t alignment,
-                               TVMType type_hint) = 0;
+                               DLDataType type_hint) = 0;
   /*!
    * \brief Free a data space on device.
    * \param ctx The device context to perform operation.
@@ -115,7 +115,7 @@ class TVM_DLL DeviceAPI {
                               size_t num_bytes,
                               TVMContext ctx_from,
                               TVMContext ctx_to,
-                              TVMType type_hint,
+                              DLDataType type_hint,
                               TVMStreamHandle stream) = 0;
     /*!
    * \brief Create a new stream of execution.
@@ -177,7 +177,7 @@ class TVM_DLL DeviceAPI {
    */
   virtual void* AllocWorkspace(TVMContext ctx,
                                        size_t nbytes,
-                                       TVMType type_hint = {});
+                                       DLDataType type_hint = {});
   /*!
    * \brief Free temporal workspace in backend execution.
    *