# OnnxRuntime: Class List

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Class List
Here are the classes, structs, unions and interfaces with brief descriptions:

Ort | All C++ Onnxruntime APIs are defined inside this namespace
detail |
AllocatedFree |
AllocatorImpl |
Base | Used internally by the C++ API. C++ wrapper types inherit from this. This is a zero cost abstraction to wrap the C API objects and delete them on destruction
Base< Unowned< T > > | Covers unowned pointers owned by either the ORT or some other instance of CPP wrappers. Used for ConstXXX and UnownedXXXX types that are copyable. Also convenient to wrap raw OrtXX pointers
ConstIoBindingImpl |
ConstSessionImpl |
ConstSessionOptionsImpl |
ConstValueImpl |
IoBindingImpl |
KernelInfoImpl |
MapTypeInfoImpl |
MemoryInfoImpl |
OrtSparseValuesParam |
SequenceTypeInfoImpl |
SessionImpl |
SessionOptionsImpl |
Shape |
TensorTypeAndShapeInfoImpl |
TypeInfoImpl |
Unowned | This is a tagging template type. Use it with Base<T> to indicate that the C++ interface object has no ownership of the underlying C object
ValueImpl |
Allocator | Wrapper around OrtAllocator
AllocatorWithDefaultOptions | Wrapper around OrtAllocator default instance that is owned by Onnxruntime
ArenaCfg | It is a structure that represents the configuration of an arena based allocator
BFloat16_t | Bfloat16 (Brain Floating Point) data type
CustomOpApi | This entire structure is deprecated, but we not marking it as a whole yet since we want to preserve for the next release
CustomOpBase |
CustomOpConfigs | Class that represents session configuration entries for one or more custom operators
CustomOpDomain | Custom Op Domain
Env | The Env (Environment)
Exception | All C++ methods that can fail will throw an exception of this type
Float16_t | IEEE 754 half-precision floating point data type
Global |
IoBinding | Wrapper around OrtIoBinding
KernelContext | This class wraps a raw pointer OrtKernelContext* that is being passed to the custom kernel Compute() method. Use it to safely access context attributes, input and output parameters with exception safety guarantees. See usage example in onnxruntime/test/testdata/custom_op_library/custom_op_library.cc
KernelInfo | This struct owns the OrtKernInfo* pointer when a copy is made. For convenient wrapping of OrtKernelInfo* passed to kernel constructor and query attributes, warp the pointer with Ort::Unowned<KernelInfo> instance so it does not destroy the pointer the kernel does not own
MapTypeInfo | Wrapper around OrtMapTypeInfo
MemoryAllocation | Represents native memory allocation coming from one of the OrtAllocators registered with OnnxRuntime. Use it to wrap an allocation made by an allocator so it can be automatically released when no longer needed
MemoryInfo | Wrapper around OrtMemoryInfo
ModelMetadata | Wrapper around OrtModelMetadata
Op | Create and own custom defined operation
OpAttr | This struct provides life time management for custom op attribute
RunOptions | RunOptions
SequenceTypeInfo | Wrapper around OrtSequenceTypeInfo
Session | Wrapper around OrtSession
SessionOptions | Wrapper around OrtSessionOptions
Status | The Status that holds ownership of OrtStatus received from C API Use it to safely destroy OrtStatus* returned from the C API. Use appropriate constructors to construct an instance of a Status object from exceptions
TensorTypeAndShapeInfo | Wrapper around OrtTensorTypeAndShapeInfo
ThreadingOptions | The ThreadingOptions
TypeInfo | Type information that may contain either TensorTypeAndShapeInfo or the information about contained sequence or map depending on the ONNXType
Value | Wrapper around OrtValue
OrtAllocator | Memory allocation interface
OrtApi | The C API
OrtApiBase | The helper interface to get the right version of OrtApi
OrtCUDAProviderOptions | CUDA Provider Options
OrtCustomHandleType |
OrtCustomOp |
OrtMIGraphXProviderOptions | MIGraphX Provider Options
OrtOpenVINOProviderOptions | OpenVINO Provider Options
OrtROCMProviderOptions | ROCM Provider Options
OrtTensorRTProviderOptions | TensorRT Provider Options